TIR1000, TIR1000I
STANDALONE IrDA ENCODER AND DECODER
SLLS228F – DECEMBER 1995 – REVISED JULY 1999
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Adds Infrared (IR) Port to Universal
Asynchronous Receiver Transmitter
(UART)
D
Compatible With Infrared Data Association
(IrDA) and Hewlett Packard Serial Infrared
(HPSIR)
D
Provides 1200 bps to 115 kbps Data Rate
D
Operates From 2.7 V to 5.5 V
D
Provides Simple Interface With UART
D
Decodes Negative or Positive Pulses
D
Available in Two 8-Terminal Plastic Small
Outline Packages (PSOP), PS Package Has
Slightly Larger Dimensions Than PW
Package
description
The TIR1000 serial infrared (SIR) encoder/
decoder is a CMOS device which encodes and
decodes bit data in conformance with the IrDA
specification.
A transceiver device is needed to interface to the photo-sensitive diode (PIN) and the light emitting diode (LED).
A UART is needed to interface to the serial data lines.
Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME NO.
I/O
DESCRIPTION
ÁÁÁ
Á
Á
Á
ÁÁÁ
16XCLK
ÁÁÁ
Á
Á
Á
ÁÁÁ
1
ÁÁ
ÁÁ
ÁÁ
IClock signal. 16XCLK should be set to 16 times the baud rate. The highest baud rate for IrDA is 115.2 kbps for which the
clock frequency equals 1.843 MHz (this terminal is tied to the BAUDOUT of a UART).
ÁÁÁ
ÁÁÁ
GND
ÁÁÁ
ÁÁÁ
4
ÁÁ
ÁÁ
Ground
ÁÁÁ
ÁÁÁ
IR_RXD
ÁÁÁ
ÁÁÁ
6
ÁÁ
ÁÁ
IInfrared receiver data. IR_RXD is an IrDA-SIR-modulated input from an optoelectronics transceiver whose input pulses
should be 3/16 of the baud rate period.
ÁÁÁ
ÁÁÁ
IR_TXD
ÁÁÁ
ÁÁÁ
7
ÁÁ
ÁÁ
OInfrared transmitter data. IR_TXD is an IrDA-SIR-modulated output to an optoelectronics transceiver.
ÁÁÁ
Á
Á
Á
ÁÁÁ
RESET
ÁÁÁ
Á
Á
Á
ÁÁÁ
5
ÁÁ
ÁÁ
ÁÁ
IActive high reset. RESET initializes an IrDA-SIR-decode/encode state machine (this terminal is tied to a UART reset
line).
ÁÁÁ
ÁÁÁ
U_RXD
ÁÁÁ
ÁÁÁ
3
ÁÁ
ÁÁ
OReceiver data. U_RXD is decoded (demodulated) data from IR_RXD according to the IrDA specification (this terminal is
tied to SIN of a UAR T).
ÁÁÁ
Á
Á
Á
ÁÁÁ
U_TXD
ÁÁÁ
Á
Á
Á
ÁÁÁ
2 I Transmitter data. U_TXD is encoded (modulated) data and output data as IR_TXD (this terminal is tied to SOUT from a
UART).
ÁÁÁ
ÁÁÁ
VCC 8Supply voltage
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
IrDA is a re
g
istered trademark of the Infrared Data Association.
functional block diagram
1
2
3
4
8
7
6
5
16XCLK
U_TXD
U_RXD
GND
VCC
IR_TXD
IR_RXD
RESET
PS OR PW PACKAGE
(TOP VIEW)
Decoder
Encoder
RESET
IR_RXD
16XCLK
U_TXD
U_RXD
IR_TXD
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright 1999, Texas Instruments Incorporated
TIR1000, TIR1000I
STANDALONE IrDA ENCODER AND DECODER
SLLS228F – DECEMBER 1995 – REVISED JULY 1999
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC (see Note 1) –0.5 V to 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range at any input, VI –0.5 V to VCC + 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, VO –0.5 V to VCC + 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, TA, TIR1000 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TA, TIR1000I –40°C to 85°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, Tstg –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Case temperature for 10 seconds: SOP package 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only , and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may af fect device reliability.
NOTE 1: All voltage levels are with respect to GND.
recommended operating conditions over recommended operating free-air temperature range
low voltage (3 V nominal)
MIN NOM MAX UNIT
Supply voltage, VCC
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁ
ÁÁÁ
2.7
ÁÁÁ
ÁÁÁ
3
ÁÁÁÁ
ÁÁÁÁ
3.3
V
High-level input voltage, VIH
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁ
ÁÁÁ
0.7 VCC
ÁÁÁ
ÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
V
Low-level input voltage, VIL
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
0.2 VCC
V
O
p
erating free air tem
p
erature TA
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
TIR1000
ÁÁÁ
ÁÁÁ
0
ÁÁÁ
ÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
70
°
C
Operating
free
-
air
temperat
u
re
,
T
A
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
TIR1000I
ÁÁÁ
ÁÁÁ
–40
ÁÁÁ
ÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
85
°C
standard voltage (5 V nominal)
MIN NOM MAX UNIT
Supply voltage, VCC 4.5 5 5.5 V
High-level input voltage, VIH 0.7 VCC V
Low-level input voltage, VIL 0.2 VCC V
O
p
erating free air tem
p
erature TA
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
TIR1000
ÁÁÁ
ÁÁÁ
0
ÁÁÁ
ÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
70
°
C
Operating
free
-
air
temperat
u
re
,
T
A
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
TIR1000I
ÁÁÁ
–40
ÁÁÁ
ÁÁÁÁ
85
°C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
VOH
High level out
p
ut voltage
IOH = –4 mA VCC = 5 V VCC – 0.8
V
V
OH
High
-
le
v
el
o
u
tp
u
t
v
oltage
IOH = –1.8 mA VCC = 3 V VCC – 0.55
V
VOL
Low level out
p
ut voltage
IOL = +4 mA VCC = 5 V 0.5
V
V
OL
Lo
w-
le
v
el
o
u
tp
u
t
v
oltage
IOL = +1.8 mA VCC = 3 V 0.5
V
IIInput current VI = 0 to VCC,All other pins floating ±3µA
ICC Supply current VCC = 5.25 V,
All inputs at 0.2 V,
No load on outputs
TA = 25°C,
16XCLK at 2 MHz, 1 mA
Ci(16XCLK) Clock input capacitance 5 pF
f(16XCLK) Clock frequency 2 MHz
TIR1000, TIR1000I
STANDALONE IrDA ENCODER AND DECODER
SLLS228F – DECEMBER 1995 – REVISED JULY 1999
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics
PARAMETER TEST CONDITIONS MIN TYP†MAX UNIT
trOutput rise time C(LOAD) = 15 pF (10% to 90%) 1.3 ns
tfOutput fall time C(LOAD)= 15 pF (90% to 10%) 1.8 ns
†Typical values are at TA = 25°C.
APPLICATION INFORMATION
To LED
From
TERMINAL
Optoelectronics
U_TXD
U_RXD
16XCLK
IR_TXD
IR_RXD
RESET
SOUT
SIN
BAUDOUT
RESET
TL16C550C UARTTIR1000, TIR1000I
Figure 1. Typical application of the TIR1000, TIR1000I
PRINCIPLES OF OPERATION
IrDA overview
The Infrared Data Association (IrDA) defines several protocols for sending and receiving serial infrared data,
including rates of 115.2 kbps, 0.576 Mbps, 1.152 Mbps, and 4 Mbps. The low rate of 115.2 kbps was specified
first and the others must maintain downward compatibility with it. At the 115.2 kbps rate, the protocol
implemented in the hardware is fairly simple. It primarily defines a serial infrared data
word
to be surrounded
by a start bit equal to 0 and a stop bit equal to 1. Individual bits are encoded or decoded the same whether they
are start, data, or stop bits. The TIR1000 and TIR1000I evaluate only single bits and only follow the 1 15.2 kbps
protocol. The 115.2 kbps rate is a maximum rate. When both ends of the transfer are set up to a lower but
matching speed, the protocol (with the TIR1000 and TIR1000I) still works. The clock used to code or sample
the data is 16 times the baud rate, or 1.843 Mhz maximum. To code a 1, no pulse is sent or received for 1-bit
time period, or 16 clock cycles. To code a 0, one pulse is sent or received within a 1-bit time period, or 16 clock
cycles. The pulse must be at least 1.6 µs wide and 3 clock cycles long at 1.843 Mhz. At lower baud rates the
pulse can be 1.6 µs wide or as long as 3 clock cycles. The transmitter output, IR_TXD, is intended to drive a
LED circuit to generate an infrared pulse. The LED circuits work on positive pulses. A terminal circuit is expected
to create the receiver input, IR_RXD. Most, but not all, PIN circuits have inversion and generate negative pulses
from the detected infrared light. Their output is normally high. The TIR1000 and TIR1000I can decode either
negative or positive pulses on IR_RXD.
TIR1000, TIR1000I
STANDALONE IrDA ENCODER AND DECODER
SLLS228F – DECEMBER 1995 – REVISED JULY 1999
4POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
IrDA encoder function
Serial data from a UART is encoded to transmit data to the optoelectronics. While the serial data input to this
block (U_TXD) is high, the output (IR_TXD) is always low, and the counter used to form a pulse on IR_TXD is
continuously cleared. After U_TXD resets to 0, IR_TXD rises on the falling edge of the seventh 16XCLK. On
the falling edge of the tenth 16XCLK pulse, IR_TXD falls, creating a 3-clock-wide pulse. While U_TXD stays
low, a pulse is transmitted during the seventh to tenth clocks of each 16-clock bit cycle.
U_TXD
16XCLK
IR_TXD
1234567 8 10 12 14 16
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎ
ÑÑÑÑÑÑÑÑÑÑÑÑ
ÑÑÑÑÑÑÑÑÑÑÑÑ
Figure 2. IrDA-SIR Encoding Scheme –
Detailed Timing Diagram Figure 3. Encoding Scheme – Macro View
16XCLK
U_TXD
IR_TXD
16 Cycles 16 Cycles 16 Cycles 16 Cycles
IrDA decoder function
After reset, U_RXD is high and the 4-bit counter is cleared. When a falling edge is detected on IR_RXD, U_RXD
falls on the next rising edge of 16XCLK with sufficient setup time. U_RXD stays low for 16 cycles (16XCLK) and
then returns to high as required by the IrDA specification. As long as no pulses (falling edges) are detected on
IR_RXD, U_RXD remains high.
IR_RXD
16XCLK
U_RXD
1 2 3 4 5 6 7 8 10 12 14 16
Figure 4. IrDA-SIR Decoding Scheme –
Detailed Timing Diagram Figure 5. Decoding Scheme – Macro View
ÑÑÑÑÑÑÑÑÑÑÑÑ
ÑÑÑÑÑÑÑÑÑÑÑÑ
16XCLK
IR_RXD
U_RXD
16 Cycles 16 Cycles 16 Cycles 16 Cycles
TIR1000, TIR1000I
STANDALONE IrDA ENCODER AND DECODER
SLLS228F – DECEMBER 1995 – REVISED JULY 1999
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
IrDA encoder function (continued)
It is possible for jitter or slight frequency differences to cause the next falling edge on IR_RXD to be missed for
one 16XCLK cycle. In that case, a 1-clock-wide pulse appears on U_RXD between consecutive zeroes. It is
important for the UART to strobe U_RXD in the middle of the bit time to avoid latching this 1-clock-wide pulse.
The TL16C550C UART already strobes incoming serial data at the proper time. Otherwise, note that data is
required to be framed by a leading zero and a trailing one. The falling edge of that first zero on U_RXD
synchronizes the read strobe. The strobe occurs on the eighth 16XCLK pulse after the U_RXD falling edge and
once every 16 cycles thereafter until the stop bit occurs.
1 2 3 4 5 6 7 8 10 12 14 16 1 2 3 4 5 6 7 8 10 12 14 16
IR_RXD
16XCLK
U_RXD
Figure 6. Timing Causing 1-clock-wide Pulse Between Consecutive Ones
ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
16 Cycles 16 Cycles
16 Cycles
7 Cycles
16XCLK
IR_RXD
U_RXD
External Strobe
Figure 7. Recommended Strobing For Decoded Data
TIR1000, TIR1000I
STANDALONE IrDA ENCODER AND DECODER
SLLS228F – DECEMBER 1995 – REVISED JULY 1999
6POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
IrDA encoder function (continued)
The TIR1000 and TIR1000I can decode positive pulses on IR_RXD. The timing is different, but the variation
is invisible to the UART. The decoder, which works from the falling edge, now recognizes a zero on the trailing
edge of the pulse rather than on the leading edge. As long as the pulse width is fairly constant, as defined by
the specification, the trailing edges should also be 16 clock cycles apart and data can readily be decoded. The
zero appears on U_RXD after the pulse rather than at the start of it.
12345678 10 12 14 16
IR_RXD
16XCLK
U_RXD
Figure 8. Positive IR_RXD Pulse Decode – Detailed View
ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
ÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑÑ
16
Cycles 16
Cycles 16
Cycles 16
Cycles
16XCLK
IR_RXD
U_RXD
Figure 9. Positive IR_RXD Pulse Decode – Macro View
PACKAGE OPTION ADDENDUM
www.ti.com 2-Jul-2010
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status (1) Package Type Package
Drawing Pins Package Qty Eco Plan (2) Lead/
Ball Finish MSL Peak Temp (3) Samples
(Requires Login)
TIR1000IPS ACTIVE SO PS 8 80 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
TIR1000IPSR ACTIVE SO PS 8 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
TIR1000IPW ACTIVE TSSOP PW 8 150 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor
or Sales Office
TIR1000IPWG4 ACTIVE TSSOP PW 8 150 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Contact TI Distributor
or Sales Office
TIR1000IPWR ACTIVE TSSOP PW 8 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
TIR1000IPWRG4 ACTIVE TSSOP PW 8 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Purchase Samples
TIR1000PSLE OBSOLETE SO PS 8 TBD Call TI Call TI Replaced by TIR1000PSR
TIR1000PSR ACTIVE SO PS 8 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
TIR1000PSRG4 ACTIVE SO PS 8 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
TIR1000PWLE OBSOLETE TSSOP PW 8 TBD Call TI Call TI Replaced by TIR1000PWR
TIR1000PWR ACTIVE TSSOP PW 8 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
TIR1000PWRG4 ACTIVE TSSOP PW 8 2000 Green (RoHS
& no Sb/Br) CU NIPDAU Level-1-260C-UNLIM Request Free Samples
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability
information and additional product content details.
TBD: The Pb-Free/Green conversion plan has not been defined.
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that
lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.
PACKAGE OPTION ADDENDUM
www.ti.com 2-Jul-2010
Addendum-Page 2
Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between
the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above.
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight
in homogeneous material)
(3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
TIR1000IPSR SO PS 8 2000 330.0 16.4 8.2 6.6 2.5 12.0 16.0 Q1
TIR1000IPWR TSSOP PW 8 2000 330.0 12.4 7.0 3.6 1.6 8.0 12.0 Q1
TIR1000PSR SO PS 8 2000 330.0 16.4 8.2 6.6 2.5 12.0 16.0 Q1
TIR1000PWR TSSOP PW 8 2000 330.0 12.4 7.0 3.6 1.6 8.0 12.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
TIR1000IPSR SO PS 8 2000 367.0 367.0 38.0
TIR1000IPWR TSSOP PW 8 2000 367.0 367.0 35.0
TIR1000PSR SO PS 8 2000 367.0 367.0 38.0
TIR1000PWR TSSOP PW 8 2000 367.0 367.0 35.0
PACKAGE MATERIALS INFORMATION
www.ti.com 14-Jul-2012
Pack Materials-Page 2
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