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 supply current is 5mA per comparator.
The MAX961/MAX963/MAX964 and MAX997 have a
shutdown mode in which they consume only 270μA sup-
ply current per comparator. The MAX961/MAX963 pro-
vide complementary outputs and a latch-enable feature.
Latch enable allows the user to hold a valid comparator
output. The MAX999 is available in a tiny 5-pin SOT23
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)
Beyond-the-Rails is a trademark and μMAX is a registered
trademark of Maxim Integrated Products, Inc. Pin Configurations continued at end of data sheet.
19-1129; Rev 7; 9/14
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(Pb)-free/RoHS-compliant package.
PART PIN-PACKAGE TOP MARK
MAX961ESA 8 SO —
MAX961EUA-T 8 µMAX —
MAX962ESA 8 SO —
MAX962EUA-T 8 µMAX —
MAX963ESD 14 SO —
MAX964ESE 16 Narrow SO —
MAX964EEE 16 QSOP —
MAX997ESA 8 SO —
MAX997EUA-T 8 µMAX —
MAX999AAUK+T 5 SOT23 +AFEI
MAX999EUK-T 5 SOT23 ACAB
PART
NO. OF
COMPARATORS
COMPLEMENTARY
OUTPUT
SHUTDOWN
LATCH
ENABLE
PIN-PACKAGE
MAX961 1 Yes Ye s Yes 8 SO/μMAX
MAX962 2 No No No 8 SO/μMAX
MAX963 2 Yes Ye s Yes 14 SO
MAX964 4 No Yes No 16 SO/QSOP
MAX997 1 No Yes No 8 SO/μMAX
MAX999 1 No No No 5 SOT23
GND
IN-IN+
1 5
TOP VIEW
VCC
Q
MAX999
SOT23
2
3 4
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
Selector Guide
Pin Congurations
Ordering Information
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
(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)
PARAMETER SYMBOL CONDITIONS TA = +25ºC TMIN to TMAX UNITS
MIN TYP MAX MIN TYP MAX
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
Input-Referred Trip Points VTRIP
VCM = -0.1V
or 5.1V,
VCC = 5V
(Note 3)
µMAX, SOT23 ±2.0 ±3.5 ±6.5
mV
MAX999AAUK ±2.0 ±3.5 ±8.0
All other E
packages ±2.0 ±3.5 ±4.0
Input-Referred Hysteresis 3.5 mV
Input Offset Voltage VOS
VCM = -0.1V
or 5.1V,
VCC = 5V
(Note 4)
µMAX, SOT23 ±0.5 ±1.5 ±4.5
mV
MAX999AAUK ±0.5 ±1.5 ±6.0
All other E
packages ±0.5 ±1.5 ±2.0
Input Bias Current IB
VIN+ = VIN-
= 0V or VCC,
VCC = 5V
µMAX, SOT23 ±15 ±30
µA
All other E
packages ±15 ±15
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
Impedance RINCM VCC = 5V 130 kΩ
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
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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.
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)
PARAMETER SYMBOL CONDITIONS TA = +25ºC TMIN to TMAX UNITS
MIN TYP MAX MIN TYP MAX
Common-Mode Rejection
Ratio CMRR
VCC = 5V,
VCM = -0.1V
to 5.1V
(Note 5)
µMAX, SOT23 0.1 0.3 1.0
mV/V
All other E
packages 0.1 0.3 0.5
Power-Supply Rejection
Ratio PSRR VCM = 0V (Note 6) 0.05 0.3 0.3 mV/V
Output High Voltage VOH
ISOURCE =
4mA
E grade VCC -
0.52
VCC -
0.52 V
MAX999AAUK VCC -
0.52
VCC -
0.55
Output Low Voltage VOL
ISINK =
4mA
E grade 0.52 0.52 V
MAX999AAUK 0.52 0.55
Capacitive Slew Current VOUT = 1.4V, VCC = 2.7V 30 60 mA
Output Capacitance 4 pF
Supply Current per
Comparator ICC
MAX961/MAX963, VCC = 5V 7.2 11 11
mA
MAX962/MAX964, VCC = 5V 5 8 9
MAX997/MAX999E, VCC = 5V 5 6.5 6.5
MAX999AAUK, VCC = 5V 5 6.5 7.0
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
1 20 µA
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
Propagation Delay tPD
5mV
overdrive
(Note 7)
E grade 4.5 7.0 8.5
ns
MAX999AAUK 4.5 7.0 10
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
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
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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)
Note 1: The MAX961EUA/MAX962EUA/MAX997EUA/MAX999EUK are 100% production tested at TA = +25°C; all temperature
specifications 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.
PARAMETER SYMBOL CONDITIONS TA = +25ºC TMIN to TMAX UNITS
MIN TYP MAX MIN TYP MAX
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
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
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Electrical Characteristics (continued)
(VCC = +3.0V, CLOAD = 5pF, 5mV of overdrive, TA = +25°C, unless otherwise noted.)
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-
1 10 100 1000 10,000
SOURCE CURRENT (µA)
MAX997toc05
OUTPUT HIGH VOLTAGE
vs. SOURCE CURRENT
V
OH
(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
V
OL
(V)
0
0.1
0.2
0.3
0.4
0.5
TA = -40°C
TA = +85°C
TA = +25°C
2 6
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
5
6.0
6.5
7.0
7.5
8.0
3 4
MAX997toc07A
MAX961/MAX963
SUPPLY CURRENT PER COMPARATOR
vs. SUPPLY VOLTAGE
TA = +85°C
TA = -40°C
TA = +25°C
0 10 20 30 40 50 60 70 80 90 100
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+
3
4
5
6
7
2 6
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
53 4
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
2 6
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
53 4
MAX9997toc7C
MAX997/MAX999
SUPPLY CURRENT PER COMPARATOR
vs. SUPPLY VOLTAGE
TA = -40°C
TA = +85°C TA = +25°C
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
Maxim Integrated
│
5
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Typical Operating Characteristics
(VCC = +3.0V, CLOAD = 5pF, 5mV of overdrive, TA = +25°C, unless otherwise noted.)
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
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
2 6
SUPPLY VOLTAGE (V)
53 4
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
V
CM
(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 = -40ºC
TA = +85ºC
TA = +25ºC
-0.5
-40 80
TEMPERATURE (ºC)
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-
0
-40 80
140
120
TEMPERATURE (°C)
SHORT-CIRCUIT CURRENT (µA)
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)
MAX997toc14
50MHz RESPONSE
VOS
GND
5ns/div
OUTPUT
1V/div
INPUT
50mV/div
VIN = 100mVP-P
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
Maxim Integrated
│
6
www.maximintegrated.com
Typical Operating Characteristics (continued)
(VCC = +3.0V, CLOAD = 5pF, 5mV of overdrive, TA = +25°C, unless otherwise noted.)
PIN NAME FUNCTION
MAX997 MAX999 MAX961 MAX962 MAX963 MAX964
1, 5 — — — — — N.C. No Connection. Not internally connected.
2 4 2 2 1 1 IN-, INA- Comparator A Inverting Input
3 3 1 1 2 2 IN+, INA+ Comparator A Noninverting Input
— — 4 — 3, 5 — LE, LEA,
LEB
Latch-Enable Input. The output latches when
LE_ is high. The latch is transparent when LE_
is low.
4 2 5 5 4, 11 12 GND Ground
— — — — — 16 N.C. No Connection. Connect to GND to prevent
parasitic feedback.
— — — 4 6 3 INB- Comparator B Inverting Input
— — — 3 7 4 INB+ Comparator B Noninverting Input
— — — — — 5 INC- Comparator C Inverting Input
— — — — — 6 INC+ Comparator C Noninverting Input
— — — — — 7 IND- Comparator D Inverting Input
— — — — — 8 IND+ Comparator D Noninverting Input
8 — 3 — 8 9 SHDN Shutdown Input. The device shuts down when
SHDN is high.
— — — 6 9 14 QB Comparator B Output
— — — — — 11 QC Comparator C Output
— — — — — 10 QD Comparator D Output
— — — — 10 — QB Comparator B Complementary Output
7 5 8 8 12 13 VCC
Positive Supply Input (VCC to GND must be
≤5.5V)
6 1 6 7 13 15 Q, QA Comparator A TTL Output
— — 7 — 14 — Q, QA Comparator A Complementary Output
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
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
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Typical Operating Characteristics (continued)
Pin Description
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 exter-
nal 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 feedback. 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 hysteresis 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 hys-
teresis effectively causes one comparator input voltage to
move quickly past the other, thus taking the input out of
the region where oscillation occurs. Standard compara-
tors 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 present).
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 internal
protection circuitry that prevents damage to the preci-
sion 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
200Ω resistors (Figure 3). The diodes limit the differential
voltage applied to the comparator’s internal circuitry to no
more than 3VF, where VF is the diode’s forward-voltage
drop (about 0.7V at +25°C).
Figure 1. Input and Output Waveforms, Noninverting Input Varied
QVOL
VOH
VTRIP+
VHYST
VTRIP-
Q
VOL
VOH
VTRIP+ + VTRIP-
2
VOS =
VIN- = 0V
VIN+
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
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For a large differential input voltage (exceeding 3VF), this
protection circuitry increases the input bias current at IN+
(source) and IN- (sink).
F
(IN IN ) 3V
Input current
2 200
+− − −
=
×
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.
Figure 2. MAX961/MAX963 Timing Diagram
Figure 3. Input Stage Circuitry
tH
tSU
tLPW
0V
VCC
VOS
DIFFERENTIAL
INPUT
VOLTAGE
LE
Q
Q
VOL
VOH
tLPD
tPD
tSKEW
tSKEW
VCC
2
VCC
2
VCC
2
MAX961–MAX964
MAX997
MAX999
IN+
200ΩTO INTERNAL
CIRCUITRY
IN-
200Ω
TO INTERNAL
CIRCUITRY
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
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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 volt-
age output transition.
Shutdown Mode
When SHDN is high, the MAX961/MAX963/MAX964/
MAX997 shut down. When shut down, the supply current
drops to 270μA per comparator, and the outputs become
high impedance. SHDN has a high input impedance.
Connect SHDN to GND for normal operation. Exit shut-
down 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 com-
parators. Keep inputs away from outputs. Keep imped-
ance 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 oscil-
lations in the transition region. This capacitor causes
negligible degradation to tPD when the source imped-
ance is low.
Figure 4. Output Stage Circuitry Figure 5. MAX961 PCB Layout
MAX961–MAX964
MAX997
MAX999
ISOURCE
Q, Q
VCC
GND
ISINK
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
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SO/MAX
QB
INB+
GND
INB-
1
2
8
7
VCC
QA
INA-
INA+
MAX962
3
4
6
5
SO/MAX
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/MAX
3
4
6
5
TOP VIEW
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
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Pin Congurations
Chip Information
MAX961/MAX962 TRANSISTOR COUNT: 286
MAX963/MAX964 TRANSISTOR COUNT: 607
MAX997/MAX999 TRANSISTOR COUNT: 142
PACKAGE TYPE PACKAGE CODE DOCUMENT NO. LAND PATTERN NO.
5 SOT23 U5+1 21-0057 90-0174
8 SO S8-2 21-0041 90-0096
8 µMAX U8-1 21-0036 90-0092
14 SO S14-1 21-0041 90-0112
16 SO S16-1 21-0041 90-0097
16 QSOP E16-1 21-0055 90-0167
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
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Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
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 specications and TOCs. 2, 3, 4, 5, 6
5 2/07 Added new Current into Input Pins in the Absolute Maximum Ratings. 2
6 12/08 Added new MAX999AAUK part and specications. 1, 2, 3
7 9/14 Removed automotive reference from Revision History. 13
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specications 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.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
MAX961–MAX964/
MAX997/MAX999
Single/Dual/Quad, Ultra-High-Speed, +3V/+5V,
Beyond-the-Rails Comparators
© 2014 Maxim Integrated Products, Inc.
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Revision History
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.