AVAILABLE
Functional Diagrams
Pin Configurations appear at end of data sheet.
Functional Diagrams continued at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
_________________General Description
The MAX961–MAX964/MAX997/MAX999 are low-power,
ultra-high-speed comparators with internal hysteresis.
These devices are optimized for single +3V or +5V
operation. The input common-mode range extends
100mV Beyond-the-Rails™, and the outputs can sink
or source 4mA to within 0.52V of GND and VCC.
Propagation delay is 4.5ns (5mV overdrive), while sup-
ply current is 5mA per comparator.
The MAX961/MAX963/MAX964 and MAX997 have a
shutdown mode in which they consume only 270µA
supply current per comparator. The MAX961/MAX963
provide complementary outputs and a latch-enable fea-
ture. Latch enable allows the user to hold a valid com-
parator output. The MAX999 is available in a tiny
SOT23-5 package. The single MAX961/MAX997 and
dual MAX962 are available in space-saving 8-pin
µMAX®packages.
________________________Applications
Single 3V/5V Systems
Portable/Battery-Powered Systems
Threshold Detectors/Discriminators
GPS Receivers
Line Receivers
Zero-Crossing Detectors
High-Speed Sampling Circuits
____________________________Features
♦♦Ultra-Fast, 4.5ns Propagation Delay
♦♦Ideal for +3V and +5V Single-Supply Applications
♦♦Beyond-the-Rails Input Voltage Range
♦♦Low, 5mA Supply Current (MAX997/MAX999)
♦♦3.5mV Internal Hysteresis for Clean Switching
♦♦Output Latch (MAX961/MAX963)
♦♦TTL/CMOS-Compatible Outputs
♦♦Shutdown Mode
(MAX961/MAX963/MAX964/MAX997)
♦♦Available in Space-Saving Packages:
5-Pin SOT23 (MAX999)
8-Pin µMAX (MAX961/MAX962/MAX997)
16-Pin QSOP (MAX964)
Selector Guide
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
19-1129; Rev 6; 2/08
PART
NO. OF
COMPARATORS
COMPLEMENTARY
OUTPUT
SHUTDOWN
LATCH
ENABLE
PIN-PACKAGE
MAX961 1Yes Yes Yes 8 SO/µMAX
MAX962 2No No No 8 SO/µMAX
MAX963 2Yes Yes Yes 14 SO
MAX964 4No Yes No 16 SO/QSOP
Pin Configurations
Beyond-the-Rails is a trademark and µMAX is a registered
trademark of Maxim Integrated Products, Inc.
GND
IN-IN+
15
TOP VIEW
VCC
Q
MAX999
SOT23-5
2
34
Pin Configurations continued at end of data sheet.
MAX997 1No Yes No 8 SO/µMAX
MAX999 1No No No 5 SOT23
Note: All E grade devices are specified over the -40°C to +85°C
operating temperature range. MAX999AAUK is specified over the
-40°C to +125°C operating temperature range.
+
Denotes a lead-free package.
Ordering Information
PART
PIN-PACKAGE
TOP
MARK
PKG
CODE
MAX961ESA 8 SO — S8-2
MAX961EUA-T 8 µMAX-8 — U8-1
MAX962ESA 8 SO — S8-2
MAX962EUA-T 8 µMAX-8 — U8-1
MAX963ESD 14 SO —
S14-1
MAX964ESE 16 Narrow SO —
S16-1
MAX964EEE 16 QSOP —
E16-1
MAX997ESA 8 SO — S8-2
MAX997EUA-T 8 µMAX-8 — U8-1
MAX999AAUK+T 5 SOT23-5
+AFEI
U5+1
MAX999EUK-T 5 SOT23-5 ACAB U5-1
MAX961–MAX964/
MAX997/MAX999
ELECTRICAL CHARACTERISTICS
(VCC = +2.7V to +5.5V, VCM = 0V, COUT = 5pF, VSHDN = 0V, VLE = 0V, unless otherwise noted. TMIN to TMAX is -40°C to +85°C for all
E grade devices. For MAX999AAUK only, TMIN to TMAX is -40°C to +125°C.) (Note 1)
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
ABSOLUTE MAXIMUM RATINGS
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 in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Supply Voltage, VCC to GND................................... -0.3V to +6V
All Other Pins..............................................-0.3V to (VCC + 0.3V)
Current into Input Pins ......................................................±20mA
Duration of Output Short Circuit to GND or VCC .......Continuous
Continuous Power Dissipation (TA= +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C).......571mW/°C
8-Pin SO (derate 5.88mW/°C above +70°C)...........471mW/°C
8-Pin µMAX (derate 4.10mW/°C above +70°C) ......330mW/°C
14-Pin SO (derate 8.33mW/°C above +70°C).........667mW/°C
16-Pin SO (derate 8.70mW/°C above +70°C).........696mW/°C
16-Pin QSOP (derate 8.33mW/°C above +70°C)....667mW/°C
Operating Temperature Range
MAX96_E/MAX99_E.........................................-40°C to +85°C
MAX999AAUK ...............................................-40°C to +125°C
Storage Temperature Range ............................ -65°C to +160°C
Lead Temperature (soldering, 10s) .................................+300°C
TA = +25°C TMIN to TMAX
PARAMETER SYMBOL CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Supply Voltage VCC Inferred by PSRR 2.7 5.5 2.7 5.5 V
Input Common-Mode
Voltage Range VCMR (Note 2) -0.1 VCC +
0.1 -0.1 VCC +
0.1 V
µMAX, SOT23 ±2.0 ±3.5 ±6.5
MAX999AAUK ±2.0 ±3.5 ±8.0
Input-Referred Trip Points VTRIP
VCM = -0.1V
or 5.1V, VCC
= 5V
(Note 3)
All other E
packages ±2.0 ±3.5 ±4.0
mV
Input-Referred Hysteresis 3.5 mV
µMAX, SOT23 ±0.5 ±1.5 ±4.5
MAX999AAUK ±0.5 ±1.5 ±6.0
Input Offset Voltage VOS
VCM = -0.1V
or 5.1V, VCC
= 5V
(Note 4)
All other E
packages ±0.5 ±1.5 ±2.0
mV
µMAX, SOT23 ±15 ±30
Input Bias Current IB
VIN+ = VIN-
= 0V or VCC,
VCC = 5V
All other E
packages ±15 ±15 µA
Differential Input Clamp
Voltage
VCC = 5.5V, VIN- = 0V,
IIN+ = 100µA 2.1 V
Input Capacitance 3 pF
Differential Input
Impedance RIND VCC = 5V 8 kΩ
Common-Mode Input RINCM VCC = 5V 130 kΩ
MAX961–MAX964/MAX997/MAX999
2
Maxim Integrated
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +5.5V, VCM = 0V, COUT = 5pF, VSHDN = 0V, VLE = 0V, unless otherwise noted. TMIN to TMAX is -40°C to +85°C for all
E grade devices. For MAX999AAUK only, TMIN to TMAX is -40°C to +125°C.) (Note 1)
TA = +25°C TMIN to TMAX
PARAMETER SYMBOL CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
µMAX, SOT23 0.1 0.3 1.0
Common-Mode Rejection
Ratio CMRR
VCC = 5V,
VCM = -0.1V
to 5.1V
(Note 5)
All other E
packages 0.1 0.3 0.5
mV/V
Power-Supply Rejection
Ratio PSRR VCM = 0V (Note 6) 0.05 0.3 0.3 mV/V
E grade VCC -
0.52
VCC -
0.52
Output High Voltage VOH ISOURCE =
4mA
MAX999AAUK VCC -
0.52
VCC -
0.55
V
E grade 0.52 0.52
Output Low Voltage VOL ISINK = 4mA MAX999AAUK 0.52 0.55 V
Capacitive Slew Current VOUT = 1.4V, VCC = 2.7V 30 60 mA
Output Capacitance 4 pF
MAX961/MAX963, VCC = 5V 7.2 11 11
MAX962/MAX964, VCC = 5V 5 8 9
MAX997/MAX999E, VCC = 5V 5 6.5 6.5
Supply Current per
Comparator ICC
MAX999AAUK, VCC = 5V 5 6.5 7.0
mA
Shutdown Supply Current
per Comparator ISHDN MAX961/MAX963/MAX964/
MAX997, VCC = 5V 0.27 0.5 0.5 mA
Shutdown Output Leakage
Current
MAX961/MAX963/MAX964/
MAX997, VOUT = 5V and
VCC - 5V
120µA
Rise/Fall Time tR, tFVCC = 5V 2.3 ns
Logic-Input High VIH VCC/2
+ 0.4
VCC/2
+ 0.4 V
Logic-Input Low VIL VCC/2
- 0.4
VCC/2
- 0.4 V
Logic-Input Current IIL, IIH VLOGIC = 0V or VCC ±15 ±30 µA
E grade 4.5 7.0 8.5
Propagation Delay tPD
5mV
overdrive
(Note 7) MAX999AAUK 4.5 7.0 10
ns
Differential Propagation
Delay tPD Between any two channels or
outputs (Q/Q)0.3 ns
Propagation-Delay Skew tSKEW Between tPD- and tPD+ 0.3 ns
Maxim Integrated
3
MAX961–MAX964/MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
Note 1: The MAX961EUA/MAX962EUA/MAX997EUA/MAX999EUK are 100% production tested at TA= +25°C; all temperature specifica-
tions are guaranteed by design.
Note 2: Inferred by CMRR. Either input can be driven to the absolute maximum limit without false output inversion, provided that the other
input is within the input voltage range.
Note 3: The input-referred trip points are the extremities of the differential input voltage required to make the comparator output change
state. The difference between the upper and lower trip points is equal to the width of the input-referred hysteresis zone. (See
Figure 1.)
Note 4: Input offset voltage is defined as the mean of the trip points.
Note 5: CMRR = (VOSL - VOSH) / 5.2V, where VOSL is the offset at VCM = -0.1V and VOSH is the offset at VCM = 5.1V.
Note 6: PSRR = (VOS2.7 - VOS5.5) / 2.8V, where VOS2.7 is the offset voltage at VCC = 2.7V, and VOS5.5 is the offset voltage at
VCC = 5.5V.
Note 7: Propagation delay for these high-speed comparators is guaranteed by design characterization because it cannot be accurately
measured using automatic test equipment. A statistically significant sample of devices is characterized with a 200mV step and
100mV overdrive over the full temperature range. Propagation delay can be guaranteed by this characterization, since DC tests
ensure that all internal bias conditions are correct. For low overdrive conditions, VTRIP is added to the overdrive.
Note 8: Guaranteed by design.
ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.7V to +5.5V, VCM = 0V, COUT = 5pF, VSHDN = 0V, VLE = 0V, unless otherwise noted. TMIN to TMAX is -40°C to +85°C for all
E grade devices. For MAX999AAUK only, TMIN to TMAX is -40°C to +125°C.) (Note 1)
TA = +25°C TMIN to TMAX
PARAMETER SYMBOL CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
Data-to-Latch Setup Time tSU MAX961/MAX963 (Note 8) 5 5 ns
Latch-to-Data Hold Time tHMAX961/MAX963 (Note 8) 5 5 ns
Latch Pulse Width tLPW MAX961/MAX963 (Note 8) 5 5 ns
Latch Propagation Delay tLPD MAX961/MAX963 (Note 8) 10 10 ns
Shutdown Time tOFF Delay until output is high-Z
(> 10kΩ)150 ns
Shutdown Disable Time tON Delay until output is valid 250 ns
MAX961–MAX964/MAX997/MAX999
4
Maxim Integrated
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
__________________________________________Typical Operating Characteristics
(VCC = +3.0V, CLOAD = 5pF, 5mV of overdrive, TA= +25°C, unless otherwise noted.)
0 102030405060708090100
INPUT OVERDRIVE (mV)
MAX997toc01
PROPAGATION DELAY
vs. INPUT OVERDRIVE
PROPAGATION DELAY (ns)
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.5
7.0
tPD-
tPD+
5.0
-40 85
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
20
5.2
5.4
5.6
5.8
6.0
6.2
6.4
6.6
6.8
-20 0 60
40
MAX997toc0202
PROPAGATION DELAY
vs. TEMPERATURE
tPD+
tPD-
0 120
CAPACITIVE LOAD (pF)
6020 40 10080
MAX997toc03
PROPAGATION DELAY
vs. CAPACITIVE LOAD
PROPAGATION DELAY (ns)
8
7
6
5
4
tPD+
tPD-
2.5 3.5 4.5 5.5
SUPPLY VOLTAGE (V)
5.03.0 4.0 6.0
MAX997toc04
PROPAGATION DELAY
vs. SUPPLY VOLTAGE
5.0
PROPAGATION DELAY (ns)
5.5
6.0
tPD+
tPD-
26
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5
6.0
6.5
7.0
7.5
8.0
34
MAX997toc07A
MAX961/MAX963
SUPPLY CURRENT PER COMPARATOR
vs. SUPPLY VOLTAGE
TA = +85°C
TA = -40°C
TA = +25°C
1 10 100 1000 10,000
SOURCE CURRENT (μA)
MAX997toc05
OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
VOH (V)
2.50
2.55
2.60
2.65
2.70
2.80
2.75
TA = -40°C
TA = +25°C
TA = +85°C
1 10 100 1000 10,000
SINK CURRENT (μA)
MAX997toc06
OUTPUT LOW VOLTAGE
vs. SINK CURRENT
VOL (V)
0
0.1
0.2
0.3
0.4
0.5
TA = -40°C
TA = +85°C
TA = +25°C
3
4
5
6
7
26
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
534
MAX997toc07B
MAX962/MAX964
SUPPLY CURRENT PER COMPARATOR
vs. SUPPLY VOLTAGE
TA = -40°C
TA = +85°C
TA = +25°C
3
4
5
6
7
8
9
26
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
534
MAX9997toc7C
MAX997/MAX999
SUPPLY CURRENT PER COMPARATOR
vs. SUPPLY VOLTAGE
TA = -40°C
TA = +85°C TA = +25°C
Maxim Integrated
5
MAX961–MAX964/MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
60
-40 80
310
260
TEMPERATURE (°C)
SHUTDOWN SUPPLY CURRENT (μA)
20
160
110
-20 0 60
210
40
MAX997toc08
MAX961/MAX963/MAX964/MAX997
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
VCC = 5.0V
VCC = 2.7V
26
SUPPLY VOLTAGE (V)
534
MAX997toc10
VOLTAGE TRIP POINT/INPUT OFFSET
VOLTAGE vs. SUPPLY VOLTAGE
-3
-4
TRIP POINT / VOS (mV)
4
3
2
1
0
-1
-2
VTRIP+
VOS
VTRIP-
-10123456
VCM (V)
MAX997toc11
INPUT BIAS CURRENT (IB+, IB-)
vs. COMMON-MODE VOLTAGE
IB+, IB- (μA)
-6
-4
-2
0
2
4
6
8
-8
VCC = 5.0V
VIN = VOS
NEGATIVE
VALUES
REPRESENT
CURRENT
FLOWING INTO
THE DEVICE
TA = -40°C
TA = +85°C
TA = +25°C
-0.5
-40 80
TEMPERATURE (°C)
INPUT BIAS/OFFSET CURRENT (μA)
20
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
-20 0 60
40
MAX997toc12
INPUT BIAS CURRENT/INPUT OFFSET
CURRENT vs. TEMPERATURE
IOS
IB+
IB-
____________________________Typical Operating Characteristics (continued)
(VCC = +3.0V, CLOAD = 5pF, 5mV of overdrive, TA= +25°C, unless otherwise noted.)
0
-40 80
140
120
TEMPERATURE (°C)
SHORT-CIRCUIT CURRENT (mA)
20
60
40
20
-20 0 60
80
100
40
MAX997toc13
SHORT-CIRCUIT OUTPUT CURRENT
vs. TEMPERATURE
OUTPUT SHORTED
TO GND (SOURCING)
OUTPUT SHORTED
TO VCC (SINKING)
3
-3
-40 85
2VTRIP+
VTRIP-
VOS
1
TEMPERATURE (°C)
TRIP POINT / VOS (mV)
20
-1
-2
-20 0 60
0
40
MAX997toc09
VOLTAGE TRIP POINT/INPUT OFFSET
VOLTAGE vs. TEMPERATURE
MAX997toc14
50MHz RESPONSE
VOS
GND
5ns/div
OUTPUT
1V/div
INPUT
50mV/div
VIN = 100mVP-P
MAX961–MAX964/MAX997/MAX999
6
Maxim Integrated
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
______________________________________________________________Pin Description
Comparator D Inverting Input—
Comparator D Noninverting Input
—
Comparator B Output—
Comparator C Output—
Comparator B Noninverting Input—
Comparator C Inverting Input
—
Comparator C Noninverting Input
—
Comparator B Inverting Input—
Comparator A Noninverting Input3
—
—
6
—
3
—
—
4
1
____________________________Typical Operating Characteristics (continued)
(VCC = +3.0V, CLOAD = 5pF, 5mV of overdrive, TA= +25°C, unless otherwise noted.)
MAX997toc15
PROPAGATION DELAY (tPD+)
GND
GND
5ns/div
OUTPUT
1V/div
INPUT
50mV/div
MAX997toc16
PROPAGATION DELAY (tPD-)
GND
GND
5ns/div
OUTPUT
1V/div
INPUT
50mV/div
Ground
4
Latch-Enable Input. The output latches when LE_
is high. The latch is transparent when LE_ is low.
—
5
—
Shutdown Input. The device shuts down when
SHDN is high.
8—
No Connection. Connect to GND to prevent par-
asitic feedback.
— —
—
—
9
4, 11
—
7
3, 5
—
—
6
2
8
—
7
8
14
12
11
4
—
5
6
3
2
9
16
IND-
IND+
QB
GND
QC
INB+
LE, LEA,
LEB
INC-
INC+
INB-
IN+, INA+
SHDN
N.C.
No Connection. Not internally connected.1, 5 — — — N.C.
Comparator D Output—10
——QD
Comparator B Complementary Output— —
—10 QB
Positive Supply Input (VCC to GND must be
≤5.5V)
713812 VCC
Comparator A TTL Output615713 Q, QA
Comparator A Complementary Output— —
—14 Q, QA
—
—
—
5
—
—
4
—
—
—
1
—
—
3
—
—
8
6
7
—
—
—
2
—
—
—
—
—
—
3
—
—
—
—
—
5
1
—
Comparator A Inverting Input2 2 1 1 IN-, INA-24
PIN
MAX963 MAX964MAX997 MAX962MAX961MAX999 NAME FUNCTION
Maxim Integrated
7
MAX961–MAX964/MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
_______________Detailed Description
The MAX961–MAX964/MAX997/MAX999 single-supply
comparators feature internal hysteresis, ultra-high-
speed operation, and low power consumption. Their
outputs are guaranteed to pull within 0.52V of either rail
without external pullup or pulldown circuitry. Beyond-
the-Rails input voltage range and low-voltage, single-
supply operation make these devices ideal for portable
equipment. These comparators all interface directly to
CMOS logic.
Timing
Most high-speed comparators oscillate in the linear
region because of noise or undesirable parasitic feed-
back. This can occur when the voltage on one input is
close to or equal to the voltage on the other input.
These devices have a small amount of internal hystere-
sis to counter parasitic effects and noise.
The added hysteresis of the MAX961–MAX964/MAX997/
MAX999 creates two trip points: one for the rising input
voltage and one for the falling input voltage (Figure 1).
The difference between the trip points is the hysteresis.
When the comparator’s input voltages are equal, the
hysteresis effectively causes one comparator input
voltage to move quickly past the other, thus taking the
input out of the region where oscillation occurs. Standard
comparators require hysteresis to be added with external
resistors. The fixed internal hysteresis eliminates these
resistors.
The MAX961/MAX963 include internal latches that allow
storage of comparison results. LE has a high input
impedance. If LE is low, the latch is transparent (i.e.,
the comparator operates as though the latch is not pre-
sent). The comparator’s output state is stored when LE
is pulled high. All timing constraints must be met when
using the latch function (Figure 2).
Input Stage Circuitry
The MAX961–MAX964/MAX997/MAX999 include inter-
nal protection circuitry that prevents damage to the pre-
cision input stage from large differential input voltages.
This protection circuitry consists of two groups of three
front-to-back diodes between IN+ and IN-, as well as
two 200Ωresistors (Figure 3). The diodes limit the dif-
ferential voltage applied to the comparator’s internal
circuitry to no more than 3VF, where VFis the diode’s
forward-voltage drop (about 0.7V at +25°C).
QVOL
VOH
VTRIP+
VHYST
VTRIP-
Q
VOL
VOH
VTRIP+ + VTRIP-
2
V
OS
=
VIN- = 0V
VIN+
Figure 1. Input and Output Waveforms, Noninverting Input Varied
MAX961–MAX964/MAX997/MAX999
8
Maxim Integrated
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
For a large differential input voltage (exceeding 3VF),
this protection circuitry increases the input bias current
at IN+ (source) and IN- (sink).
(IN+ - IN-) - 3VF
Input current = ————————
2 x 200
Input currents with large differential input voltages
should not be confused with input bias currents (IB).
As long as the differential input voltage is less than
3VF, this input current is less than 2IB.
The input circuitry allows the MAX961–MAX964/
MAX997/MAX999’s input common-mode range to
extend 100mV beyond both power-supply rails. The
output remains in the correct logic state if one or both
inputs are within the common-mode range. Taking
either input outside the common-mode range causes
the input to saturate and the propagation delay to
increase.
tH
tSU
tLPW
0V
VCC
VOS
DIFFERENTIAL
INPUT
VOLTAGE
LE
Q
Q
VOL
VOH
tLPD
tPD
tSKEW
tSKEW
VCC
2
VCC
2
VCC
2
Figure 2. MAX961/MAX963 Timing Diagram
MAX961-MAX964
MAX997
MAX999
IN+
200ΩTO INTERNAL
CIRCUITRY
IN-
200Ω
TO INTERNAL
CIRCUITRY
Figure 3. Input Stage Circuitry
Maxim Integrated
9
MAX961–MAX964/MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
Output Stage Circuitry
The MAX961–MAX964/MAX997/MAX999 contain a cur-
rent-driven output stage, as shown in Figure 4. During an
output transition, ISOURCE or ISINK is pushed or pulled to
the output pin. The output source or sink current is high
during the transition, creating a rapid slew rate. Once the
output voltage reaches VOH or VOL, the source or sink
current decreases to a small value, capable of maintain-
ing the VOH or VOL in static condition. This decrease in
current conserves power after an output transition has
occurred.
One consequence of a current-driven output stage is a
linear dependence between the slew rate and the load
capacitance. A heavy capacitive load slows down the
voltage output transition.
Shutdown Mode
When SHDN is high, the MAX961/MAX963/MAX964/
MAX997 shut down. When shut down, the supply cur-
rent drops to 270µA per comparator, and the outputs
become high impedance. SHDN has a high input
impedance. Connect SHDN to GND for normal opera-
tion. Exit shutdown with LE low; otherwise, the output is
indeterminate.
__________Applications Information
Circuit Layout and Bypassing
The MAX961–MAX964/MAX997/MAX999’s high band-
width requires a high-speed layout. Follow these layout
guidelines:
1) Use a PCB with a good, unbroken, low-inductance
ground plane.
2) Place a decoupling capacitor (a 0.1µF ceramic sur-
face-mount capacitor is a good choice) as close to
VCC as possible.
3) On the inputs and outputs, keep lead lengths short
to avoid unwanted parasitic feedback around the
comparators. Keep inputs away from outputs. Keep
impedance between the inputs low.
4) Solder the device directly to the printed circuit board
rather than using a socket.
5) Refer to Figure 5 for a recommended circuit layout.
6) For slow-moving input signals, take care to prevent
parasitic feedback. A small capacitor (1000pF or
less) placed between the inputs can help eliminate
oscillations in the transition region. This capacitor
causes negligible degradation to tPD when the
source impedance is low.
Figure 4. Output Stage Circuitry
MAX961-MAX964
MAX997
MAX999
ISOURCE
Q, Q
VCC
GND
ISINK
Figure 5. MAX961 PCB Layout
MAX961–MAX964/MAX997/MAX999
10
Maxim Integrated
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
SO/μMAX
QB
INB+
GND
INB-
1
2
8
7
VCC
QA
INA-
INA+
MAX962
3
4
6
5
SO/μMAX
Q
IN+
N.C.
GND
1
2
8
7VCC
SHDN
IN-
N.C.
MAX997
3
4
6
5
SO
SO/QSOP
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
INA- N.C.
QA
QB
VCC
GND
QC
QD
SHDN
MAX964
INA+
INB-
INC+
INB+
INC-
IND-
IND+
14
13
12
11
10
9
8
1
2
3
4
5
6
7
QA
QA
VCC
GNDGND
LEA
INA+
INA-
MAX963
QB
QB
SHDNINB+
INB-
LEB
Q
SHDN
GND
LE
1
2
8
7
VCC
Q
IN-
IN+
MAX961
SO/μMAX
3
4
6
5
TOP VIEW
Pin Configurations
___________________Chip Information
MAX961/MAX962 TRANSISTOR COUNT: 286
MAX963/MAX964 TRANSISTOR COUNT: 607
MAX997/MAX999 TRANSISTOR COUNT: 142
Maxim Integrated
11
MAX961–MAX964/MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
8LUMAXD.EPS
PACKAGE OUTLINE, 8L uMAX/uSOP
1
1
21-0036
J
REV.DOCUMENT CONTROL NO.APPROVAL
PROPRIETARY INFORMATION
TITLE:
MAX
0.043
0.006
0.014
0.120
0.120
0.198
0.026
0.007
0.037
0.0207 BSC
0.0256 BSC
A2 A1
c
eb
A
L
FRONT VIEW SIDE VIEW
E H
0.6±0.1
0.6±0.1
Ø0.50±0.1
1
TOP VIEW
D
8
A2 0.030
BOTTOM VIEW
1
6°
S
b
L
H
E
D
e
c
0°
0.010
0.116
0.116
0.188
0.016
0.005
8
4X S
INCHES
-
A1
A
MIN
0.002
0.950.75
0.5250 BSC
0.25 0.36
2.95 3.05
2.95 3.05
4.78
0.41
0.65 BSC
5.03
0.66
6°0°
0.13 0.18
MAX
MIN
MILLIMETERS
- 1.10
0.05 0.15
α
α
DIM
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
MAX961–MAX964/MAX997/MAX999
12
Maxim Integrated
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
QSOP.EPS
Maxim Integrated
13
MAX961–MAX964/MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
SOICN .EPS
PACKAGE OUTLINE, .150" SOIC
1
1
21-0041 B
REV.DOCUMENT CONTROL NO.APPROVAL
PROPRIETARY INFORMATION
TITLE:
TOP VIEW
FRONT VIEW
MAX
0.010
0.069
0.019
0.157
0.010
INCHES
0.150
0.007
E
C
DIM
0.014
0.004
B
A1
MIN
0.053A
0.19
3.80 4.00
0.25
MILLIMETERS
0.10
0.35
1.35
MIN
0.49
0.25
MAX
1.75
0.050
0.016L0.40 1.27
0.3940.386D
D
MINDIM
D
INCHES
MAX
9.80 10.00
MILLIMETERS
MIN MAX
16 AC
0.337 0.344 AB8.758.55 14
0.189 0.197 AA5.004.80 8
N MS012
N
SIDE VIEW
H 0.2440.228 5.80 6.20
e 0.050 BSC 1.27 BSC
C
HE
eBA1
A
D
0∞-8∞
L
1
VARIATIONS:
MAX961–MAX964/MAX997/MAX999
14
Maxim Integrated
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
SOT-23 5L .EPS
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information
go to www.maxim-ic.com/packages.)
Maxim Integrated
15
MAX961–MAX964/MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
Revision History
REVISION
NUMBER
REVISION
DATE DESCRIPTION PAGES
CHANGED
0 9/96 Initial release —
1 12/96 Added 8-pin µMAX packages. Correct minor errors. 1, 2, 3
2 3/97 Added dual and quad MAX963/MAX964 packages. 1, 2, 3
3 7/97 Added new MAX997 and MAX999 parts. 1, 2, 3
4 3/99 New wafer fab/process change to CB20. Update specifications and TOCs. 2, 3, 4, 5, 6
5 2/07 Added new Current into Input Pins in the Absolute Maximum Ratings.2
6 12/07 Added new automotive grade MAX999AAUK part and specifications. 1, 2, 3
MAX961–MAX964/MAX997/MAX999
16 Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical
Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
© 2007 Maxim Integrated The Maxim logo and Maxim Integrated are trademarks of Maxim Integrated Products, Inc.
