2010 Microchip Technology Inc. DS21909D-page 1
MCP9800/1/2/3
Features:
• Temperature-to-Digital Converter
• Accuracy with 12-bit Resolution:
- ±0.5°C (typical) at +25°C
- ±1°C (maximum) from -10°C to +85°C
- ±2°C (maximum) from -10°C to +125°C
- ±3°C (maximum) from -55°C to +125°C
• User-selectable Resolution: 9-12 bit
• Operating Voltage Range: 2.7V to 5.5V
• 2-wire Interface: I2C™/SMBus Compatible
• Operating Current: 200 µA (typical)
• Shutdown Current: 1 µA (maximum)
• Power-saving One-shot Temperature
Measurement
• Available Packages: SOT-23-5, MSOP-8, SOIC-8
Typical Applications:
• Personal Computers and Servers
• Hard Disk Drives and Other PC Peripherals
• Entertainment Systems
• Office Equipment
• Data Communication Equipment
• Mobile Phones
• General Purpose Temperature Monitoring
Typical Application
Description:
Microchip Technology Inc.’s MCP9800/1/2/3 family of
digital temperature sensors converts temperatures
between -55°C and +125°C to a digital word. They
provide an accuracy of ±1°C (maximum) from -10°C to
+85°C.
The MCP9800/1/2/3 family comes with
user-programmable registers that provide flexibility for
temperature sensing applications. The register settings
allow user-selectable 9-bit to 12-bit temperature
measurement resolution, configuration of the
power-saving Shutdown and One-shot (single
conversion on command while in Shutdown) modes
and the specification of both temperature alert output
and hysteresis limits. When the temperature changes
beyond the specified limits, the MCP9800/1/2/3 outputs
an alert signal. The user has the option of setting the
alert output signal polarity as an active-low or
active-high comparator output for thermostat operation,
or as temperature event interrupt output for
microprocessor-based systems.
This sensor has an industry standard 2-wire, I2C™/
SMBus compatible serial interface, allowing up to eight
devices to be controlled in a single serial bus. These
features make the MCP9800/1/2/3 ideal for
sophisticated multi-zone temperature-monitoring
applications.
Package Types
PIC®
VDD
R
Microcontroller
MCP9800/02
GND
VDD
ALERT
SDA
SCLK
4
1
2
3
5
I2C™ Port
I/O Port
RPULL-UP
PIC16F737
SDA
GND
ALERT
SCLK
GND
V
DD
ALERT
SDA
SCLK
4
MCP9800
MCP9802
1
2
3
5
SOT-23-5
MCP9801
MCP9803
1
2
3
4
8
7
6
5
SOIC, MSOP
A0
V
DD
A1
A2
MCP9802/03: Serial Bus time-out 35 ms (typ.)
MCP9800/01: No Serial Bus time-out
2-Wire High-Accuracy Temperature Sensor
MCP9800/1/2/3
DS21909D-page 2 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. DS21909D-page 3
MCP9800/1/2/3
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
VDD....................................................................... 6.0V
Voltage at all Input/Output pins .....GND – 0.3V to 5.5V
Storage temperature .......................... -65°C to +150°C
Ambient temp. with power applied ..... -55°C to +125°C
Junction Temperature (TJ) ................................. 150°C
ESD protection on all pins (HBM:MM) .......(4 kV:400V)
Latch-Up Current at each pin........................ ±200 mA
†Notice: Stresses above those listed under “Maximum
ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied.
Exposure to maximum rating conditions for extended periods
may affect device reliability.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground, and
TA = -55°C to +125°C.
Parameters Sym Min Typ Max Unit Conditions
Power Supply
Operating Voltage Range VDD 2.7 — 5.5 V
Operating Current IDD — 200 400 µA Continuous Operation
Shutdown Current ISHDN — 0.1 1 µA Shutdown mode
Power-on-Reset Threshold (POR) VPOR —1.7— VV
DD falling edge
Line Regulation Δ°C/ΔV— 0.2 — °C/VV
DD = 2.7V to 5.5V
Temperature Sensor Accuracy
Accuracy with 12-bit Resolution:
TA = +25°C TACY —±0.5— °CV
DD = 3.3V
-10°C < TA +85°C TACY -1.0 — +1.0 °C VDD = 3.3V
-10°C < TA +125°C TACY -2.0 — +2.0 °C VDD = 3.3V
-55°C < TA +125°C TACY -3.0 — +3.0 °C VDD = 3.3V
Internal ADC
Conversion Time:
9-bit Resolution tCONV — 30 75 ms 33 samples/sec (typical)
10-bit Resolution tCONV — 60 150 ms 17 samples/sec (typical)
11-bit Resolution tCONV — 120 300 ms 8 samples/sec (typical)
12-bit Resolution tCONV — 240 600 ms 4 samples/sec (typical)
Alert Output (Open-drain)
High-level Current IOH —— 1µAV
OH = 5V
Low-level Voltage VOL ——0.4VI
OL= 3 mA
Thermal Response
Response Time tRES — 1.4 — s Time to 63% (89°C)
27°C (Air) to 125°C (oil bath)
MCP9800/1/2/3
DS21909D-page 4 2010 Microchip Technology Inc.
Graphical Symbol Description
DIGITAL INPUT/OUTPUT PIN CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground and
TA = -55°C to +125°C.
Parameters Sym Min Typ Max Units Conditions
Serial Input/Output (SCLK, SDA, A0, A1, A2)
Input
High-level Voltage VIH 0.7 VDD —— V
Low-level Voltage VIL ——0.3V
DD V
Input Current IIN -1 — +1 µA
Output (SDA)
Low-level Voltage VOL ——0.4VI
OL= 3 mA
High-level Current IOH ——1µAV
OH = 5V
Low-level Current IOL 6——mAV
OL = 0.6V
Capacitance CIN —10—pF
SDA and SCLK Inputs
Hysteresis VHYST 0.05 VDD —— V
TEMPERATURE CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VDD = +2.7V to +5.5V, GND = Ground.
Parameters Sym Min Typ Max Units Conditions
Temperature Ranges
Specified Temperature Range TA-55 — +125 °C (Note 1)
Operating Temperature Range TA-55 — +125 °C
Storage Temperature Range TA-65 — +150 °C
Thermal Package Resistances
Thermal Resistance, 5L-SOT23 JA —256— °C/W
Thermal Resistance, 8L-SOIC JA —163— °C/W
Thermal Resistance, 8L-MSOP JA —206— °C/W
Note 1: Operation in this range must not cause TJ to exceed Maximum Junction Temperature (+150°C).
VDD VIH
VIL
IIN
Voltage
Current
Time
Time
VDD
IOH
Voltage
Current
Time
Time
INPUT OUTPUT
VOL
IOL
2010 Microchip Technology Inc. DS21909D-page 5
MCP9800/1/2/3
Timing Diagram
SERIAL INTERFACE TIMING SPECIFICATIONS
Electrical Specifications: Unless otherwise indicated, VDD = 2.7V to 5.5V, GND = Ground, -55°C < TA < +125°C,
CL = 80 pF, and all limits measured to 50% point.
Parameters Sym Min Typ Max Units Conditions
2-Wire I2C™/SMBus Compatible Interface
Serial Port Frequency fSC 0 — 400 kHz I2C MCP9800/01
fSC 10 — 400 kHz SMBus MCP9802/03
Clock Period tSC 2.5 — — µs
Low Clock tLOW 1.3 — — µs
High Clock tHIGH 0.6 — — µs
Rise Time tR20 — 300 ns 10% to 90% of VDD (SCLK, SDA)
Fall Time tF20 — 300 ns 90% to 10% of VDD (SCLK, SDA)
Data Setup Before SCLK High tSU-DATA 0.1 — — µs
Data Hold After SCLK Low tH-DATA 0—0.9µs
Start Condition Setup Time tSU-START 0.6 — — µs
Start Condition Hold Time tH-START 0.6 — — µs
Stop Condition Setup Time tSU-STOP 0.6 — — µs
Bus Idle tIDLE 1.3 — — µs
Time Out tOUT 25 35 50 ms MCP9802/03 only
tSU-START
tH-START
tSU-DATA
tSU-STOP
tB-FREE
SCL
SDA
tH-DATA
tHIGH
tLOW
tR, tF
Start Condition Data Transmission Stop Condition
MCP9800/1/2/3
DS21909D-page 6 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. DS21909D-page 7
MCP9800/1/2/3
2.0 TYPICAL PERFORMANCE CURVES
Note: Unless otherwise noted: VDD = 2.7V to 5.5V.
FIGURE 2-1: Average Temperature
Accuracy vs. Ambient Temperature, VDD = 3.3V.
FIGURE 2-2: Average Temperature
Accuracy vs. Ambient Temperature.
FIGURE 2-3: Average Temperature
Accuracy vs. Ambient Temperature, VDD = 3.3V.
FIGURE 2-4: Temperature Accuracy
Histogram, TA = +25°C.
FIGURE 2-5: Supply Current vs. Ambient
Temperature.
FIGURE 2-6: Shutdown Current vs.
Ambient Temperature.
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore, outside the warranted range.
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-55 -35 -15 5 25 45 65 85 105 125
TA (°C)
Temperature Accuracy (°C)
12-Bit Resolution
160 Samples
VDD= 3.3V
Spec. Limits
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-55 -35 -15 5 25 45 65 85 105 125
TA (°C)
Temperature Accuracy (°C)
12-Bit Resolution
160 Samples
VDD = 2.7V
VDD = 3.3V
VDD = 5.5V
VDD = 5.0V
-3.0
-2.0
-1.0
0.0
1.0
2.0
3.0
-55 -35 -15 5 25 45 65 85 105 125
TA (°C)
Temperature Accuracy (°C)
11-Bit
12-Bit
9-Bit
10-Bit
VDD = 3.3V
160 Samples
Resolution
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Temperature Accuracy (°C)
Occurrences
TA = +25°C
VDD = 3.3V
5 lots
32 Samples/lot
160 Samples
50
100
150
200
250
300
350
400
-55 -35 -15 5 25 45 65 85 105 125
TA (°C)
IDD (µA)
VDD = 2.7V
VDD = 3.3V
VDD = 5.5V
VDD = 5.0V
0
0.2
0.4
0.6
0.8
1
-55 -35 -15 5 25 45 65 85 105 125
TA (°C )
ISHDN (µA)
MCP9800/1/2/3
DS21909D-page 8 2010 Microchip Technology Inc.
Note: Unless otherwise noted: VDD = 2.7V to 5.5V.
FIGURE 2-7: ALERT and SDA IOL vs.
Ambient Temperature.
FIGURE 2-8: ALERT and SDA Output
VOL vs. Ambient Temperature.
FIGURE 2-9: MCP980X Thermal
Response vs Time.
6
12
18
24
30
36
42
48
-55 -35 -15 5 25 45 65 85 105 125
TA (°C)
ALERT & SDA IOL (mA)
VDD = 5.5V
VDD = 3.3V
VDD = 2.7V
VOL
= 0.6V
0
0.1
0.2
0.3
0.4
-55 -35 -15 5 25 45 65 85 105 125
TA (°C)
ALERT & SDA VOL (V)
VDD = 5.5V
VDD = 3.3V
VDD = 2.7V
IOL
= 3mA
5
25
45
65
85
105
125
145
-202468101214161820
Time (s)
Temperature Data (°C)
SOIC
Average of 10 samples per package
27°C (Air) to 125°C (Oil bath)
MSOP
SOT-23
2010 Microchip Technology Inc. DS21909D-page 9
MCP9800/1/2/3
3.0 PIN DESCRIPTION
The descriptions of the pins are listed in Table 3 - 1.
TABLE 3-1: PIN FUNCTION TABLE
3.1 Serial Data Pin (SDA)
The SDA is a bidirectional input/output pin, used to
serially transmit data to and from the host controller.
This pin requires a pull-up resistor to output data.
3.2 Serial Clock Pin (SCLK)
The SCLK is a clock input pin. All communication and
timing is relative to the signal on this pin. The clock is
generated by the host controller on the bus.
3.3 Power Supply Input (VDD)
The VDD pin is the power pin. The operating voltage, as
specified in the DC electrical specification table, is
applied on this pin.
3.4 Ground (GND)
The GND pin is the system ground pin.
3.5 ALERT Output
The MCP9800/1/2/3’s ALERT pin is an open-drain
output pin. The device outputs an alert signal when the
ambient temperature goes beyond the
user-programmed temperature limit.
3.6 Address Pins (A2, A1, A0)
These pins are device or slave address input pins and
are available only with the MCP9801/03. The device
addresses for the MCP9800/02 are factory-set.
The address pins are the Least Significant bits (LSb) of
the device address bits. The Most Significant bits
(MSb) (A6, A5, A4, A3) are factory-set to <1001>. This
is illustrated in Tab le 3-2.
MCP9800
MCP9802
SOT-23-5
MCP9801
MCP9803
MSOP, SOIC
Symbol Function
5 1 SDA Bidirectional Serial Data
4 2 SCLK Serial Clock Input
3 3 ALERT Temperature Alert Output
2 4 GND Ground
— 5 A2 Address Select Pin (bit 2)
— 6 A1 Address Select Pin (bit 1)
— 7 A0 Address Select Pin (bit 0)
18V
DD Power Supply Input
TABLE 3-2: SLAVE ADDRESS
Device A6 A5 A4 A3 A2 A1 A0
MCP9800/02A0 1001000
MCP9800/02A1 1001001
MCP9800/02A2 1001010
MCP9800/02A3 1001011
MCP9800/02A4 1001100
MCP9800/02A5 1001101
MCP9800/02A6 1001110
MCP9800/02A7 1001111
MCP9801/03 1001XXX
Note: User-selectable address is shown by X.
MCP9800/1/2/3
DS21909D-page 10 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. DS21909D-page 11
MCP9800/1/2/3
4.0 SERIAL COMMUNICATION
4.1 2-Wire SMBus/Standard Mode
I2C™ Protocol-Compatible
Interface
The MCP9800/1/2/3 serial clock input (SCL) and the
bidirectional serial data line (SDA) form a 2-wire
bidirectional SMBus/Standard mode I2C compatible
communication port (refer to the Digital Input/Output
Pin Characteristics Table and Serial Interface
Timing Specifications Table).
The following bus protocol has been defined:
TABLE 4-1: MCP9800 SERIAL BUS
PROTOCOL DESCRIPTIONS
4.1.1 DATA TRANSFER
Data transfers are initiated by a Start condition (Start),
followed by a 7-bit device address and a read/write bit.
An Acknowledge (ACK) from the slave confirms the
reception of each byte. Each access must be
terminated by a Stop condition (Stop).
Repeated communication is initiated after tB-FREE.
This device does not support sequential register read/
write. Each register needs to be addressed using the
Register Pointer.
This device supports the Receive Protocol. The
register can be specified using the pointer for the initial
read. Each repeated read or receive begins with a Start
condition and address byte. The MCP9800/1/2/3
retains the previously selected register. Therefore, it
outputs data from the previously-specified register
(repeated pointer specification is not necessary).
4.1.2 MASTER/SLAVE
The bus is controlled by a master device (typically a
microcontroller) that controls the bus access and
generates the Start and Stop conditions. The
MCP9800/1/2/3 is a slave device and does not control
other devices in the bus. Both master and slave
devices can operate as either transmitter or receiver.
However, the master device determines which mode is
activated.
4.1.3 START/STOP CONDITION
A high-to-low transition of the SDA line (while SCL is
high) is the Start condition. All data transfers must be
preceded by a Start condition from the master. If a Start
condition is generated during data transfer, the
MCP9800/1/2/3 resets and accepts the new Start
condition.
A low-to-high transition of the SDA line (while SCL is
high) signifies a Stop condition. If a Stop condition is
introduced during data transmission, the MCP9800/1/
2/3 releases the bus. All data transfers are ended by a
Stop condition from the master.
4.1.4 ADDRESS BYTE
Following the Start condition, the host must transmit an
8-bit address byte to the MCP9800/1/2/3. The address
for the MCP9800 Temperature Sensor is
‘1001,A2,A1,A0’ in binary, where the A2, A1 and A0
bits are set externally by connecting the corresponding
pins to VDD ‘1’ or GND ‘0’. The 7-bit address
transmitted in the serial bit stream must match the
selected address for the MCP9800/1/2/3 to respond
with an ACK. Bit 8 in the address byte is a read/write
bit. Setting this bit to ‘1’ commands a read operation,
while ‘0’ commands a write operation (see Figure 4-1).
Term Description
Master The device that controls the serial bus,
typically a microcontroller.
Slave The device addressed by the master,
such as the MCP9800/1/2/3.
Transmitter Device sending data to the bus.
Receiver Device receiving data from the bus.
Start A unique signal from master to initiate
serial interface with a slave.
Stop A unique signal from the master to
terminate serial interface from a slave.
Read/Write A read or write to the MCP9800/1/2/3
registers.
ACK A receiver Acknowledges (ACK) the
reception of each byte by polling the
bus.
NAK A receiver Not-Acknowledges (NAK) or
releases the bus to show End-of-Data
(EOD).
Busy Communication is not possible
because the bus is in use.
Not Busy The bus is in the Idle state, both SDA
and SCL remain high.
Data Valid SDA must remain stable before SCL
becomes high in order for a data bit to
be considered valid. During normal
data transfers, SDA only changes state
while SCL is low.
MCP9800/1/2/3
DS21909D-page 12 2010 Microchip Technology Inc.
FIGURE 4-1: Device Addressing.
4.1.5 DATA VALID
After the Start condition, each bit of data in
transmission needs to be settled for a time specified by
tSU-DATA before SCL toggles from low-to-high (see
“Serial Interface Timing Specifications” on Page 5).
4.1.6 ACKNOWLEDGE (ACK)
Each receiving device, when addressed, is obliged to
generate an ACK bit after the reception of each byte.
The master device must generate an extra clock pulse
for ACK to be recognized.
The acknowledging device pulls down the SDA line for
tSU-DATA before the low-to-high transition of SCL from
the master. SDA also needs to remain pulled down for
tH-DATA after a high-to-low transition of SCL.
During read, the master must signal an End-of-Data
(EOD) to the slave by not generating an ACK bit (NAK)
once the last bit has been clocked out of the slave. In
this case, the slave will leave the data line released to
enable the master to generate the Stop condition.
123456789
SCL
SDA 10 01A2 A1 A0
Start
Address Byte
Slave
Address R/W
PIC18FXXXX Response
Code Address
A
C
K
2010 Microchip Technology Inc. DS21909D-page 13
MCP9800/1/2/3
5.0 FUNCTIONAL DESCRIPTION
The MCP9800/1/2/3 temperature sensor consists of a
band-gap type temperature sensor, a Analog-to-
Digital Converter (ADC), user-programmable registers
and a 2-wire I2C protocol-compatible serial interface.
FIGURE 5-1: Functional Block Diagram.
5.1 Temperature Sensor
The MCP9800/1/2/3 uses the difference in the base-
emitter voltage of a transistor while its collector current
is changed from IC1 to IC2. With this method, the VBE
depends only on the ratio of the two currents and the
ambient temperature, as shown in Equation 5-1.
EQUATION 5-1:
5.2 Analog-to-Digital Converter
A Sigma-Delta ADC is used to convert VBE to a digital
word that corresponds to the transistor temperature.
The converter has an adjustable resolution from 0.5°C
(at 30 ms conversion time) to 0.0625°C (at 240 ms
conversion time). Thus, it allows the user to make
trade-offs between resolution and conversion time.
Refer to Section 5.3.2 “Sensor Configuration
Register (CONFIG)” and Section 5.3.4.7 “ ADC
Resolution” for details.
Resolution
0.5°C
0.25°C
0.125°C
0.0625°C
Temperature
THYST
TSET
Register
Register
Register
Register
Pointer
I2C™
Interface
Configuration
Register ADC
Band-Gap
Temperature
Sensor
One-Shot
Shutdown
Fault Queue
Alert Polarity
Alert Comp/Int
VBE
kT
q
------
ln IC1IC2
=
Where:
T = temperature in kelvin
VBE = change in diode base-emitter
voltage
k = Boltzmann's constant
q = electron charge
IC1 and IC2= currents with n:1 ratio
MCP9800/1/2/3
DS21909D-page 14 2010 Microchip Technology Inc.
5.3 Registers
The MCP9800/1/2/3 has four registers that are
user-accessible. These registers are specified as the
Ambient Temperature (TA) register, the Temperature
Limit-set (TSET) register, the Temperature Hysteresis
(THYST) register and device Configuration (CONFIG)
register.
The Ambient Temperature register is a read-only
register and is used to access the ambient temperature
data. The data from the ADC is loaded in parallel in the
register. The Temperature Limit-set and Temperature
Hysteresis registers are read/write registers that
provide user-programmable temperature limits. If the
ambient temperature drifts beyond the programmed
limits, the MCP9800/1/2/3 outputs an alert signal using
the ALERT pin (refer to Section 5.3.4.3 “ALERT
Output Configuration”). The device Configuration
register provides access for the user to configure the
MCP9800/1/2/3’s various features. These registers are
described in further detail in the following sections.
The registers are accessed by sending Register Point-
ers to the MCP9800/1/2/3 using the serial interface.
This is an 8-bit pointer. However, the two Least
Significant bits (LSbs) are used as pointers and all
other bits need to be cleared <0>. This device has addi-
tional registers that are reserved for test and
calibration. If these registers are accessed, the device
may not perform according to the specification. The
pointer description is shown below.
FIGURE 5-2: Register Block Diagram.
ALERT Output
Control Logic
ALERT
Output
Resolution
Temperature
THYST
TSET
Register
Register
Register
Configuration
Register
One-Shot
Shutdown
Fault Queue
Alert Polarity
Alert Comp/Int
REGISTER 5-1: REGISTER POINTER
U-0 U-0 U-0 U-0 U-0 U-0 R/W-0 R/W-0
000000P1P0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7-2 Unimplemented: Read as ‘0’
bit 1-0 Px<1:0>: Pointer bits
00 = Temperature register (TA)
01 = Configuration register (CONFIG)
10 = Temperature Hysteresis register (THYST)
11 = Temperature Limit-set register (TSET)
.
2010 Microchip Technology Inc. DS21909D-page 15
MCP9800/1/2/3
TABLE 5-1: BIT ASSIGNMENT SUMMARY FOR ALL REGISTERS
Register
Pointer
P1 P0
MSB/
LSB
Bit Assignment
76 5 43210
Ambient Temperature Register (TA)
0 0 MSB Sign 26°C 25°C 24°C 23°C 22°C 21°C 20°C
LSB 2-1°C 2-2°C 2-3°C 2-4°C 0000
Sensor Configuration Register (CONFIG)
0 1 LSB One-Shot Resolution Fault Queue ALERT
Polarity
COMP/INT Shutdown
Temperature Hysteresis Register (THYST)
1 0 MSB Sign 26°C 25°C 24°C 23°C 22°C 21°C 20°C
LSB 2-1°C 0 0 0 0 0 0 0
Temperature Limit-Set Register (TSET)
1 1 MSB Sign 26°C 25°C 24°C 23°C 22°C 21°C 20°C
LSB 2-1°C 0 0 0 0 0 0 0
MCP9800/1/2/3
DS21909D-page 16 2010 Microchip Technology Inc.
5.3.1 AMBIENT TEMPERATURE
REGISTER (TA)
The MCP9800/1/2/3 has a 16-bit read-only Ambient
Temperature register that contains 9-bit to 12-bit
temperature data. (0.5°C to 0.0625°C resolutions,
respectively). This data is formatted in two’s
complement. The bit assignments, as well as the
corresponding resolution, is shown in the register
assignment below.
The refresh rate of this register depends on the
selected ADC resolution. It takes 30 ms (typical) for
9-bit data and 240 ms (typical) for 12-bit data. Since
this register is double-buffered, the user can read the
register while the MCP9800/1/2/3 performs
Analog-to-Digital conversion in the background. The
decimal code to ambient temperature conversion is
shown in Equation 5-2:
EQUATION 5-2:
TACode 2 4–
=
Where:
TA= Ambient Temperature (°C)
Code = MCP9800 output in decimal
REGISTER 5-2: AMBIENT TEMPERATURE REGISTER (TA) – ADDRESS <0000 0000>b
Upper Half:
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
Sign 26 °C 25 °C 24 °C 23 °C 22 °C 21 °C 20 °C
bit 15 bit 8
Lower Half:
R-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
2-1 °C/bit 2-2 °C 2-3 °C 2-4 °C 0 0 0 0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
Note 1: When the 0.5°C, 0.25°C or 0.125°C resolutions are selected, bit 6, bit 7 or bit 8 will remain clear <0>,
respectively.
2010 Microchip Technology Inc. DS21909D-page 17
MCP9800/1/2/3
FIGURE 5-3: Timing Diagram for Reading +25.25°C Temperature from the TA Register (See
Section 5.3.1 “Ambient Temperature Register (TA)”).
SDA A
C
K
1001A
TA Pointer
0000
A
C
K
S2
A
1
A
0
12345678 12345678
SCL
0
Address Byte
A
C
K
1001A
MSB Data
A
C
K
N
A
K
S P
2
A
1
A
0
12345678 12345678 12345678
Address Byte LSB Data
R
PIC18FXXX PIC18FXXX
PIC18FXXX Master Master
W
SDA
SCL
000
00011001 01000
000
Note: It is not necessary to
select the Register
Pointer if it was set
from the previous read/
write.
(see Section 4.1.1)
MCP9800/1/2/3
DS21909D-page 18 2010 Microchip Technology Inc.
5.3.2 SENSOR CONFIGURATION
REGISTER (CONFIG)
The MCP9800/1/2/3 has an 8-bit read/write
Configuration register that allows the user to select the
different features. These features include shutdown,
ALERT output select as comparator or interrupt output,
ALERT output polarity, fault queue cycle, temperature
measurement resolution and One-shot mode (single
conversion while in shutdown). These functions are
described in detail in the following sections.
REGISTER 5-3: CONFIGURATION REGISTER (CONFIG) – ADDRESS <0000 0001>b
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
One-Shot Resolution Fault Queue ALERT
Polarity
COMP/INT Shutdown
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7 ONE-SHOT bit
1 = Enabled
0 = Disabled (Power-up default)
bit 5-6 ADC RESOLUTION bits
00 = 9 bit or 0.5°C (Power-up default)
01 = 10 bit or 0.25°C
10 = 11 bit or 0.125°C
11 = 12 bit or 0.0625°C
bit 3-4 FAULT QUEUE bits
00 = 1 (Power-up default)
01 =2
10 =4
11 =6
bit 2 ALERT POLARITY bit
1 = Active-high
0 = Active-low (Power-up default)
bit 1 COMP/INT bit
1 = Interrupt mode
0 = Comparator mode (Power-up default)
bit 0 SHUTDOWN bit
1 = Enable
0 = Disable (Power-up default)
2010 Microchip Technology Inc. DS21909D-page 19
MCP9800/1/2/3
FIGURE 5-4: Timing Diagram for Writing and Reading from the Configuration Register (See
Section 5.3.2 “Sensor Configuration Register (CONFIG)”).
SDA A
C
K
1001A
CONFIG Pointer
0000
A
C
K
S2
A
1
A
0
12345678 12345678
SCL
0
Address Byte
A
C
K
1001
A
Data
N
A
K
S P
2
A
1
A
0
12345678 12345678
Address Byte
R
PIC18FXXX PIC18FXXX
PIC18FXXX
W
SDA
SCL
001
01100000
• Reading the CONFIG Register.
• Writing to the CONFIG Register to change the resolution to 0.0625°C <0110 0000>b.
SDA A
C
K
1001A0000
A
C
K
S2
A
1
A
0
12345678 12345678
SCL
0
Address Byte
W
PIC18FXXX PIC18FXXX
MSB Data
A
C
KP
12345678 1
CONFIG Pointer
PIC18FXXX
001
01100000
Note: It is not necessary to
select the Register
Pointer if it was set
from the previous read/
write
(see Section 4.1.1).
MCP9800/1/2/3
DS21909D-page 20 2010 Microchip Technology Inc.
5.3.3 TEMPERATURE HYSTERESIS
REGISTER (THYST)
The MCP9800/1/2/3 has a 16-bit read/write
Temperature Hysteresis register that contains a 9-bit
data in two’s compliment format. This register is used
to set a hysteresis for the TSET limit. Therefore, the data
represents a minimum temperature limit. If the ambient
temperature drifts below the specified limit, the
MCP9800/1/2/3 asserts an alert output (refer to
Section 5.3.4.3 “ALERT Output Configuration”).
This register uses the nine Most Significant bits (MSbs)
and all other bits are “don’t cares”.
The power-up default value of THYST register is 75°C,
or <0100 1011 0>b in binary.
REGISTER 5-4: TEMPERATURE HYSTERESIS REGISTER (THYST) – ADDRESS <0000 0010>b
Upper Half:
R/W-0 R/W-1 R/W-0 R/W-0 R/W-1 R/W-0 R/W-1 R/W-1
Sign 26 °C 25 °C 24 °C 23 °C 22 °C 21 °C 20 °C
bit 15 bit 8
Lower Half:
R/W-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
2-1 °C 0 0 0 0 0 0 0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
2010 Microchip Technology Inc. DS21909D-page 21
MCP9800/1/2/3
FIGURE 5-5: Timing Diagram for Writing and Reading from the Temperature Hysteresis Register
(See Section 5.3.3 “Temperature Hysteresis Register (THYST)”).
SDA A
C
K
1001A0000
A
C
K
S2
A
1
A
0
12345678 12345678
SCL
0
Address Byte
A
C
K
1001
A
MSB Data
A
C
K
N
A
K
S P
2
A
1
A
0
12345678 12345678 12345678
Address Byte LSB Data
R
PIC18FXXX PIC18FXXX
PIC18FXXX Master Master
W
SDA
SCL
010
01011111 00000
000
• Reading the THYST Register.
• Writing to the THYST Register to set the temperature hysteresis to 95°C <0101 1111 0000 0000>b.
SDA A
C
K
1001A0000
A
C
K
S2
A
1
A
0
12345678 12345678
SCL
0
Address Byte
W
PIC18FXXX PIC18FXXX
MSB Data
A
C
K
A
C
KP
12345678 12345678
LSB Data
THYST Pointer
PIC18FXXX PIC18FXX
010
01011111 00000
000
Note: It is not necessary to
select the Register
Pointer if it was set
from the previous read/
write
(see Section 4.1.1).
THYST Pointer
MCP9800/1/2/3
DS21909D-page 22 2010 Microchip Technology Inc.
5.3.4 TEMPERATURE LIMIT-SET
REGISTER (TSET)
The MCP9800/1/2/3 has a 16-bit read/write
Temperature Limit-Set register (TSET) which contains a
9-bit data in two’s compliment format. This data
represents a maximum temperature limit. If the ambient
temperature exceeds this specified limit, the
MCP9800/1/2/3 asserts an alert output. (Refer to
Section 5.3.4.3 “ALERT Output Configuration”).
This register uses the nine Most Significant bits (MSbs)
and all other bits are “don’t cares”.
The power-up default value of the TSET register is
80°C, or <0101 0000 0>b in binary.
REGISTER 5-5: TEMPERATURE LIMIT-SET REGISTER (TSET) – ADDRESS <0000 0011>b
Upper Half:
R/W-0 R/W-1 R/W-0 R/W-1 R/W-0 R/W-0 R/W-0 R/W-0
Sign 26 °C 25 °C 24 °C 23 °C 22 °C 21 °C 20 °C
bit 15 bit 8
Lower Half:
R/W-0 R-0 R-0 R-0 R-0 R-0 R-0 R-0
2-1 °C 0 0 0 0 0 0 0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
2010 Microchip Technology Inc. DS21909D-page 23
MCP9800/1/2/3
FIGURE 5-6: Timing Diagram for Writing and Reading from the Temperature Limit-set Register
(See Section 5.3.4 “Temperature Limit-Set Register (TSET)”).
SDA A
C
K
1001A
TSET Pointer
0000
A
C
K
S2
A
1
A
0
12345678 12345678
SCL
0
Address Byte
A
C
K
1001
A
MSB Data
A
C
K
N
A
K
S P
2
A
1
A
0
12345678 12345678 12345678
Address Byte LSB Data
R
PIC18FXXX PIC18FXXX
PIC18FXXX Master Master
W
SDA
SCL
011
01011010 00000
000
• Reading the TSET Register.
• Writing to the TSET Register to set the temperature limit to 90°C, <0101 1010 0000 0000>b
SDA A
C
K
1001A0000
A
C
K
S2
A
1
A
0
12345678 12345678
SCL
0
Address Byte
W
PIC18FXXX PIC18FXXX
MSB Data
A
C
K
A
C
KP
12345678 12345678
LSB Data
TSET Pointer
PIC18FXXX PIC18FXX
011
01011010 00000
000
Note: It is not necessary to
select the Register
Pointer if it was set
from the previous read/
write.
(see Section 4.1.1)
MCP9800/1/2/3
DS21909D-page 24 2010 Microchip Technology Inc.
5.3.4.1 Shutdown Mode
The Shutdown mode disables all power-consuming
activities (including temperature sampling operations)
while leaving the serial interface active. The device
consumes 2 µA (maximum) in this mode. It remains in
this mode until the Configuration register is updated to
enable continuous conversion or until power is
recycled.
In Shutdown mode, the CONFIG, TA, TSET and THYST
registers can be read or written to; however, the serial
bus activity will increase the shutdown current.
5.3.4.2 One-Shot Mode
The MCP9800/1/2/3 can also be used in a One-shot
mode that can be selected using bit 7 of the CONFIG
register. The One-shot mode performs a single
temperature measurement and returns to Shutdown
mode. This mode is especially useful for low-power
applications where temperature is measured upon
command from a controller. For example, a 9-bit TA in
One-shot mode consumes 200 µA (typical) for 30 ms
and 0.1 µA (typical) during shutdown.
To access this feature, the device needs to initially be
in Shutdown mode. This is done by sending a byte to
the CONFIG register with bit 0 set <1> and bit 7 cleared
<0>. Once the device is in Shutdown mode, the
CONFIG register needs to be written to again, with bit
0 and bit 7 set <1>. This begins the single conversion
cycle of tCONV, 30ms for 9-bit data. Once the
conversion is completed, TA is updated and bit 7 of
CONFIG becomes cleared <0> by the MCP9800/1/2/3.
TABLE 5-2: SHUTDOWN AND ONE-SHOT
MODE DESCRIPTION
5.3.4.3 ALERT Output Configuration
The ALERT output can be configured as either a
comparator output or as Interrupt Output mode using
bit 1 of CONFIG. The polarity can also be specified as
an active-high or active-low using bit 2 of CONFIG. The
following sections describe each output mode, while
Figure 5-7 gives a graphical description.
5.3.4.4 Comparator Mode
In Comparator mode, the ALERT output is asserted
when TA is greater than TSET
. The pin remains active
until TA is lower than THYST
. The Comparator mode is
useful for thermostat-type applications, such as turning
on a cooling fan or triggering a system shutdown when
the temperature exceeds a safe operating range.
In Comparator mode, if the device enters the Shutdown
mode with asserted ALERT output, the output remains
active during shutdown. The device must be operating
in continuous conversion, with TA below THYST
, for the
ALERT output to be deasserted.
5.3.4.5 Interrupt Mode
In Interrupt mode, the ALERT output is asserted when
TA is greater than TSET
. However, the output is
deasserted when the user performs a read from any
register. This mode is designed for interrupt-driven,
microcontroller-based systems. The microcontroller
receiving the interrupt will have to acknowledge the
interrupt by reading any register from the MCP9800/1/
2/3. This will clear the interrupt and the ALERT pin will
become deasserted. When TA drifts below THYST
, the
MCP9800/1/2/3 outputs another interrupt and the
controller needs to read a register to deassert the
ALERT output. Shutting down the device will also reset,
or deassert, the ALERT output.
FIGURE 5-7: Alert Output.
Operational Mode One-Shot
(Bit 7)
Shutdown
(Bit 0)
Continuous Conversion 00
Shutdown 01
Continuous Conversion
(One-shot is ignored)
10
One-shot (Note 1)11
Note 1: The shutdown command <01> needs to
be programmed before sending a
one-shot command <11>.
TSET
THYST
ALERT
ALERT
Comparator mode
Interrupt mode
Active-low
Active-low
TA
Register
Read
* See Section 5.3.4.5 “Interrupt Mode”
*
2010 Microchip Technology Inc. DS21909D-page 25
MCP9800/1/2/3
5.3.4.6 Fault Queue
The fault queue feature can be used as a filter to lessen
the probability of spurious activation of the ALERT pin.
TA must remain above TSET for the consecutive
number of conversion cycles selected using the Fault
Queue bits. Bit 3 and bit 4 of CONFIG can be used to
select up to six fault queue cycles. For example, if six
fault queues are selected, TA must be greater than
TSET for six consecutive conversions before ALERT is
asserted as a comparator or an interrupt output.
This queue setting also applies for THYST
. If six fault
queues are selected, TA must remain below THYST for
six consecutive conversions before ALERT is
deasserted (Comparator mode) or before another
interrupt is asserted (Interrupt mode).
5.3.4.7 ADC Resolution
The MCP9800/1/2/3 provides access to select the ADC
resolution from 9-bit to 12-bit (0.5°C to 0.0625°C
resolution) using bit 6 and bit 5 of the CONFIG register.
The user can gain better insight into the trends and
characteristics of the ambient temperature by using a
finer resolution. Increasing the resolution also reduces
the quantization error. Figure 2-3 shows accuracy
versus resolution.
Table 5-3 shows the TA register conversion time for the
corresponding resolution.
TABLE 5-3: RESOLUTION AND
CONVERSION TIME
5.4 Summary of Power-up Condition
The MCP9800/1/2/3 has an internal Power-on Reset
(POR) circuit. If the power supply voltage VDD glitches
down to the 1.7V (typical) threshold, the device resets
the registers to the power-up default settings.
Table 5-4 shows the power-up default summary.
TABLE 5-4: POWER-UP DEFAULTS
At power-up, the MCP9800/1/2/3 has an inherent 2 ms
(typical) power-up delay before updating the registers
with default values and start a conversion cycle. This
delay reduces register corruption due to unsettled
power. After power-up, it takes tCONV for the TCN75A
to update the TA register with valid temperature data.
Bits Resolution tCONV (typical)
90.5 30ms
10 0.25 60 ms
11 0.125 120 ms
12 0.0625 240 ms
Register Data
(Hex) Power-up Defaults
TA0000 0°C
TSET A000 80°C
THYST 9600 75°C
Pointer 00 Temperature register
CONFIG 00
Continuous Conversion
Comparator mode
Active-low Output
Fault Queue 1
9-bit Resolution
MCP9800/1/2/3
DS21909D-page 26 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. DS21909D-page 27
MCP9800/1/2/3
6.0 APPLICATIONS INFORMATION
6.1 Connecting to the Serial Bus
The SDA and SCL serial interface are open-drain pins
that require pull-up resistors. This configuration is
shown in Figure 6-1.
FIGURE 6-1: Pull-up Resistors on Serial
Interface.
The MCP9800/1/2/3 is designed to meet 0.4V
(maximum) voltage drop at 3 mA of current. This allows
the MCP9800/1/2/3 to drive lower values of pull-up
resistors and higher bus capacitance. In this
application, all devices on the bus must meet the same
pull-down current requirements.
6.2 Typical Application
Microchip provides several microcontroller product
lines with Master Synchronous Serial Port modules
(MSSP) that include the I2C interface mode. This
module implements all master and slave functions and
simplifies the firmware development overhead.
Figure 6-2 shows a typical application using the
PIC16F737 as a master to control other Microchip
slave products, such as EEPROM, fan speed
controllers and the MCP9800 temperature sensor
connected to the bus.
FIGURE 6-2: Multiple Devices on I2C™
Bus.
The ALERT output can be wired with a number of other
open-drain devices. In such applications, the output
needs to be programmed as an active-low output. Most
systems will require pull-up resistors for this
configuration.
6.3 Layout Considerations
The MCP9800/1/2/3 does not require any additional
components besides the master controller in order to
measure temperature. However, it is recommended
that a decoupling capacitor of 0.1 µF to 1 µF be used
between the VDD and GND pins. A high-frequency
ceramic capacitor is recommended. It is necessary for
the capacitor to be located as close as possible to the
power pins in order to provide effective noise
protection.
For applications where a switching regulator is used to
power the sensor, it is recommended to add a 200Ω
resistor in series to VDD to filter out the switcher noise
from the sensor. It is also recommended to add the
series resistor in applications where a linear regulator
is used to step-down a switching regulator voltage to
power the sensor. For example, if a linearly regulated
3.3V from a 5V switching regulator is used to power the
sensor, add a 200Ω series resistor (refer to Figure 6-3).
FIGURE 6-3: Power-supply Filter Using a
Single Resistor.
6.4 Thermal Considerations
The MCP9800/1/2/3 measures temperature by
monitoring the voltage of a diode located in the die. A
low-impedance thermal path between the die and the
Printed Circuit Board (PCB) is provided by the pins.
Therefore, the MCP9800/1/2/3 effectively monitors the
temperature of the PCB. However, the thermal path for
the ambient air is not as efficient because the plastic
device package functions as a thermal insulator.
A potential for self-heating errors can exist if the
MCP9800/1/2/3 SDA and SCL communication lines
are heavily loaded with pull-ups. Typically, the
self-heating error is negligible because of the relatively
small current consumption of the MCP9800/1/2/3.
However, in order to maximize the temperature
accuracy, the SDA and SCL pins need to be lightly
loaded.
PIC®SDA
SCL
VDD
R
R
MCU
MCP9800/1/2/3
SDA SCL
PIC16F737
Microcontroller
Temperature
Sensor
24LC01
EEPROM
TC654
Fan Speed
Controller
TCN75A
VDD
200
MCP9800/1/2/3
Switching
Regulator 0.1 µF
bypass
VDD
200
MCP9800/1/2/3
Switching
Regulator 0.1 µF
bypass
Regulator
Linear
MCP9800/1/2/3
DS21909D-page 28 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. DS21909D-page 29
MCP9800/1/2/3
7.0 PACKAGING INFORMATION
7.1 Package Marking Information
5-Lead SOT-23
XXNN
8-Lead SOIC (150 mil) Example:
XXXXXXXX
XXXXYYWW
NNN
MCP9803
SN1044
256
8-Lead MSOP Example:
XXXXX
YWWNNN
9803M
044256
Example:
Part Number MCP9800 Part Number MCP9802
MCP9800A0T-M/OT LDNN MCP9802A0T-M/OT JKNN
MCP9800A1T-M/OT LENN MCP9802A1T-M/OT JLNN
MCP9800A2T-M/OT LFNN MCP9802A2T-M/OT JMNN
MCP9800A3T-M/OT LGNN MCP9802A3T-M/OT JPNN
MCP9800A4T-M/OT LHNN MCP9802A4T-M/OT JQNN
MCP9800A5T-M/OT LJNN MCP9802A5T-M/OT JRNN
MCP9800A6T-M/OT LKNN MCP9802A6T-M/OT JSNN
MCP9800A7T-M/OT LLNN MCP9802A7T-M/OT JTNN
Legend: XX...X Customer-specific information
Y Year code (last digit of calendar year)
YY Year code (last 2 digits of calendar year)
WW Week code (week of January 1 is week ‘01’)
NNN Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
*This package is Pb-free. The Pb-free JEDEC designator ( )
can be found on the outer packaging for this package.
Note: In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
3
e
3
e
MCP9800/1/2/3
DS21909D-page 30 2010 Microchip Technology Inc.
φ
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b
E
E1
D
123
e
e1
A
A1
A2 c
L
L1
2010 Microchip Technology Inc. DS21909D-page 31
MCP9800/1/2/3
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
MCP9800/1/2/3
DS21909D-page 32 2010 Microchip Technology Inc.
!"
D
N
E
E1
NOTE 1
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e
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A
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A2 c
L1 L
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2010 Microchip Technology Inc. DS21909D-page 33
MCP9800/1/2/3
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
MCP9800/1/2/3
DS21909D-page 34 2010 Microchip Technology Inc.
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
2010 Microchip Technology Inc. DS21909D-page 35
MCP9800/1/2/3
Note: For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
MCP9800/1/2/3
DS21909D-page 36 2010 Microchip Technology Inc.
#$%&'()*+,
2010 Microchip Technology Inc. DS21906D-page 37
MCP9800/1/2/3
APPENDIX A: REVISION HISTORY
Revision D (November 2010)
The following is the list of modifications:
1. Updated Tab l e 3 -2 to include all available I2C
address options for the MCP9800/02.
2. Added more package markings examples to the
table in Section 7.1 “Package Marking
Information”.
3. Updated the Product Identification System
section.
Revision C (September 2010)
The following is the list of modifications:
1. Updated Section 6.3 “Layout Considerations”.
2. Updated package markings drawings.
3. Removed lead free designation letter G from
Section 7.0 “Packaging Information” and
from the Product Identification System page. All
devices are lead free.
4. Added Appendix A: Revision History
Revision B (May 2008)
The following is the list of modifications:
1. Added lead free designation letter G in
Section 7.0 “Packaging Information” and in
the Product Identification System page.
Revision A (October 2004)
• Original Release of this Document.
MCP9800/1/2/3
DS21906D-page 38 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. DS21909D-page 39
MCP9800/1/2/3
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO. –X /XX
PackageTemperature
Range
Device
Device: MCP9800: Temperature Sensor
MCP9801: Temperature Sensor
MCP9802: Temperature Sensor
MCP9803: Temperature Sensor
A0 = Slave address set to ‘000’
A1 = Slave address set to ‘001’
A2 = Slave address set to ‘010’
A3 = Slave address set to ‘011’
A4 = Slave address set to ‘100’
A5 = Slave address set to ‘101’
A6 = Slave address set to ‘110’
A7 = Slave address set to ‘111’
Tape and Reel: = Blank
T = Tape and Reel
Temperature Range: M = -55C to +125C
Package: OT = Plastic Small Outline Transistor (SOT-23), 5-lead
MS = Plastic Micro Small Outline (MSOP), 8-lead
SN = Plastic SOIC, (150 mil Body), 8-lead
Examples:
a) MCP9800A0T-M/OT Slave address ‘000’,
Tape and Reel,
-55C to +125C,
SOT-23 package.
b) MCP9800A5T-M/OT Slave address ‘101’,
Tape and Reel,
-55C to +125C,
SOT-23 package.
a) MCP9801-M/MS -55C to +125C,
8LD MSOP package.
b) MCP9801T-M/MS Tape and Reel, -55C
to +125C,
8LD MSOP package.
c) MCP9801-M/SN -55C to +125C,
8LD SOIC package.
d) MCP9801T-M/SN Tape and Reel, -55C
to +125C,
8LD SOIC package.
a) MCP9802A0T-M/OT Slave address ‘000’,
Tape and Reel, -55C
to +125C, SOT-23
package.
b) MCP9802A5T-M/OT Slave address ‘101’,
Tape and Reel, -55C
to +125C, SOT-23
package.
a) MCP9803-M/MS -55C to +125C,
8LD MSOP package.
b) MCP9803T-M/MS Tape and Reel, -55C
to +125C,
8LD MSOP package.
c) MCP9803-M/SN -55C to +125C,
8LD SOIC package.
d) MCP9803T-M/SN Tape and Reel, -55C
to +125C,
8LD SOIC package.
XX
Slave
Address
X
Tape & Reel
MCP9800/1/2/3
DS21909D-page 40 2010 Microchip Technology Inc.
NOTES:
2010 Microchip Technology Inc. DS21909D-page 41
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART,
PIC32 logo, rfPIC and UNI/O are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MXDEV, MXLAB, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip
Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified
logo, MPLIB, MPLINK, mTouch, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance,
TSHARC, UniWinDriver, WiperLock and ZENA are
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2010, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-60932-662-3
Note the following details of the code protection feature on Microchip devices:
• Microchip products meet the specification contained in their particular Microchip Data Sheet.
• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
• Microchip is willing to work with the customer who is concerned about the integrity of their code.
• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS21909D-page 42 2010 Microchip Technology Inc.
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08/04/10
