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MAX9140/MAX9141/
MAX9142/MAX9144
40ns, Low-Power, 3V/5V, Rail-to-Rail
Single-Supply Comparators
General Description
The MAX9140/MAX9141 are single and the MAX9142/
MAX9144 are dual/quad high-speed comparators optimized
for systems powered from a 3V or 5V supply. The MAX9141
features latch enable and device shutdown. These devices
combine high speed, low power, and rail-to-rail inputs.
Propagation delay is 40ns, while supply current is only
150μA per comparator.
The input common-mode range of the devices extends beyond
both power-supply rails. The outputs pull to within 0.3V of
either supply rail without external pullup circuitry, making these
devices ideal for interface with both CMOS and TTL logic. All
input and output pins can tolerate a continuous short-circuit
fault condition to either rail. Internal hysteresis ensures clean
output switching, even with slow-moving input signals.
The devices are higher-speed, lower-power, and lower-
cost upgrades to industry-standard comparators MAX941/
MAX942/MAX944.
The MAX9140 are offered in tiny 5-pin SC70 and SOT23
packages. The MAX9141 and MAX9142 are available in
8-pin SOT23 and SO packages, while the MAX9144 is
available in both 14-pin SO and TSSOP packages.
Applications
● Line Receivers
● Battery-Powered Systems
● Threshold Detectors/Discriminators
● 3V/5V Systems
● Zero-Crossing Detectors
● Sampling Circuits
Features
● Fast, 40ns Propagation Delay (10mV Overdrive)
● Low Power
• 150μA Supply Current Per Comparator (3V)
● Optimized for 3V and 5V Applications
● Rail-to-Rail Input Voltage Range
Low, 500μV Offset Voltage
● Internal Hysteresis for Clean Switching
● Outputs Swing 300mV of Power Rails
● CMOS/TTL-Compatible Outputs
● Output Latch (MAX9141 Only)
● Shutdown Function (MAX9141 Only)
● Available in SC70 and SOT23 Packages
Ordering Information
PART*
PIN-PACKAGE
TOP MARK
MAX9140AAUK+T
MAX9140AAXK+T
5 SOT23
5 SC70
+AFEJ
+ASW
MAX9140EXK-T
5 SC70
ACC
MAX9140EUK-T
5 SOT23
ADQP
MAX9141EKA-T
8 SOT23
AAFD
MAX9141ESA
8 SO
MAX9142EKA-T
8 SOT23
AAFE
MAX9142ESA
8 SO
MAX9144EUD
14 TSSOP
MAX9144ESD
14 SO
Note: All E-grade devices are specified over the -40°C to +85°C
operating temperature range. All A-grade devices are specified
over the -40°C to +125°C operating temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
-Denotes a package containing lead(Pb).
T = Tape and reel.
Pin Configurations
TOP VIEW
OUT 1
GND 2
IN+ 3
MAX9140 5 VCC
VCC 1
IN+ 2
IN- 3
GND 4
4 IN-
SC70/SOT23
MAX9141
SOT23/SO
8 N.C. OUTA 1
7 OUT INA- 2
6 SHDN
5 LE
INA+ 3
GND 4
MAX9142
A
B
SOT23/SO
OUTA 1
INA- 2
8 VCC
INA+ 3
7 OUTB
6 INB-
VCC 4
INB+ 5
5 INB+
INB- 6
OUTB 7
14 OUTD
13 IND-
AD
12 IND+
MAX9144
BC
11 GND
10 INC+
9 INC-
8 OUTC
TSSOP/SO
19-2064; Rev 6; 10/15

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MAX9140/MAX9141/
MAX9142/MAX9144
40ns, Low-Power, 3V/5V, Rail-to-Rail
Single-Supply Comparators
Absolute Maximum Ratings
Power-Supply Ranges
8-Pin SOT23 (derate 9.1mW/°C above +70°C)...........727mW
Supply Voltage (VCC to GND)............................................+6V
IN+, IN- to GND..................................... -0.3V to (VCC + 0.3V)
LE Input Voltage (MAX9141 only)......... -0.3V to (VCC + 0.3V)
SHDN Input Voltage (MAX9141 only)... -0.3V to (VCC + 0.3V)
Current into Input Pins......................................................±20mA
8-Pin SO (derate 5.9mW/°C above +70°C)...............470.6mW
14-Pin TSSOP (derate 9.1mW/°C above +70°C).........727mW
14-Pin SO (derate 8.33mW/°C above +70°C)...........666.7mW
Operating Temperature Range
E grade............................................................ -40°C to +85°C
Input/Output Short-Circuit Duration to
A grade.......................................................... -40°C to +125°C
VCC or GND...........................................................Continuous
Continuous Power Dissipation (TA = +70°C)
5-Pin SC70 (derate 3.1mW/°C above +70°C)..............247mW
Junction Temperature.......................................................+150°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°C
5-Pin SOT23 (derate 7.1mW/°C above +70°C)...........571mW
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 = 5V, VCM = 0V, SHDN = LE = VCC (MAX9141 only), CL = 15pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are
at TA = +25°C.) (Note 1)
PARAMETER
Operating Supply Voltage
Input Voltage Range
Input Offset Voltage
Input Hysteresis
Input Bias Current
Input Offset Current
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
Output High Voltage
Output Low Voltage
Output Leakage Current
SYMBOL
VCC (Note 2)
CONDITIONS
VCMR (Note 3)
VOS
VHYST
IB
IOS
CMRR
PSRR
(Note 4)
TA = +25°C
TA = -40°C to +85°C
MAX9140AA_ _
(Note 5)
(Note 6)
TA = -40°C to +85°C
MAX9140AA_ _
TA = -40°C to +85°C
MAX9140AA_ _
VCC = 5.5V
(Note 7)
TA = -40°C to +85°C
MAX9140AA_ _
2.7V ≤ VCC
5.5V
TA = -40°C to +85°C
MAX9140AA_ _
VOH
VOL
ILEAK
ISOURCE =
4mA
TA = -40°C to +85°C
MAX9140AA_ _
ISINK = 4mA
TA = -40°C to +85°C
MAX9140AA_ _
SHDN = GND, MAX9141 only (Note 8)
MIN TYP
2.7
-0.2
0.5
1.5
90
8
80
80
VCC -
0.425
VCC -
0.3
VCC - 0.47
0.3
0.04
MAX
5.5
VCC +
0.2
2.0
4.5
6.0
320
350
120
140
800
850
750
800
UNITS
V
V
mV
mV
nA
nA
µV/V
µV/V
V
0.425
0.45
1
V
µA
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Maxim Integrated 2

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MAX9140/MAX9141/
MAX9142/MAX9144
40ns, Low-Power, 3V/5V, Rail-to-Rail
Single-Supply Comparators
Electrical Characteristics (continued)
(VCC = 5V, VCM = 0V, SHDN = LE = VCC (MAX9141 only), CL = 15pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are
at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MAX9141
MIN
TYP
MAX UNITS
165 275
Supply Current (Per Comparator)
Propagation Delay
Differential Propagation Delay
Propagation Delay Skew
Logic Input-Voltage High
Logic Input-Voltage Low
Logic Input Current
Data-to-Latch Setup Time
Latch-to-Data Hold Time
Latch Pulse Width
Latch Propagation Delay
Shutdown Enable Time
ICC
tPD+,
tPD-
dtPD
VIH
VIL
IIL, IIH
tS
tH
tLPW
tLPD
VCM = VCC = 3V
MAX9140,
TA = -40°C to 85°C
MAX9140AA_ _
MAX9142/MAX9144
MAX9141
VCM = VCC = 5V
MAX9140,
TA = -40°C to 85°C
MAX9140AA_ _
MAX9142/MAX9144
MAX9141 only, SHDN = GND;
VCC = VCM = 3V
VCC = 3V, VOD = 10mV
VOD = 10mV (Note 9)
VOD = 10mV (Note 10)
(Note 11)
(Note 11)
VLOGIC = 0 to VCC (Note 11)
(Note 12)
(Note 12)
(Note 12)
(Note 12)
(Note 13)
150 250
360
150 250
200 320
165 300
400
165 300
12 30
(VCC/2)
+0.4
40
2
2
VCC/2
VCC/2
2
16
16
45
60
1
(VCC/2)
-0.4
10
µA
ns
ns
ns
V
V
µA
ns
ns
ns
ns
µs
Shutdown Disable Time
(Note 13)
5 µs
Note 1: All devices are 100% production tested at TA = +25°C. Specifications over temperature are guaranteed by design.
Note 2: Inferred from PSRR test.
Note 3: Inferred from CMRR test. Note also that either or both inputs can be driven to the absolute maximum limit (0.3V beyond
either supply rail) without damage or false output inversion.
Note 4: VOS is defined as the center of the input-referred hysteresis zone. See Figure 1.
Note 5: 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 6: The polarity of IB reverses direction as VCM approaches either supply rail.
Note 7: Specified over the full common-mode voltage range (VCMR).
Note 8: Specification is for current flowing into or out of the output pin for VOUT driven to any voltage from VCC to GND while the part
is in shutdown.
Note 9: Specified between any two channels in the MAX9142/MAX9144.
Note 10: Specified as the difference between tPD+ and tPD- for any one comparator.
Note 11: Applies to the MAX9141 only for both SHDN and LE.
Note 12: Applies to the MAX9141 only. Comparator is active with LE driven high and is latched with LE driven low (VOD = 10mV). See
Figure 2.
Note 13: Applicable to the MAX9141 only. Comparator is active with the SHDN driven high and is shutdown with SHDN driven low.
Shutdown enable time is the delay when the SHDN is driven high to the time the output is valid. Shutdown disable time is the
delay when the SHDN is driven low to the time the comparator shuts down.
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Maxim Integrated 3

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MAX9140/MAX9141/
MAX9142/MAX9144
40ns, Low-Power, 3V/5V, Rail-to-Rail
Single-Supply Comparators
Typical Operating Characteristics
(VCC = 3.0V, VCM = 0V, CL = 15pF, VOD = 10mV, TA = +25°C, unless otherwise noted.)
MAX9140 SUPPLY CURRENT
vs. SUPPLY VOLTAGE
300
250
TA = +85∞C
200
TA = +25∞C
150 TA = -40∞C
100
50
0
3
5.20
5.15
45
VCC (V)
OUTPUT HIGH VOLTAGE
vs. TEMPERATURE
6
ISOURCE = 4mA
VCC = 5.5V
5.10
5.05
5.00
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
OUTPUT SHORT-CIRCUIT (SOURCE)
CURRENT vs. TEMPERATURE
45
35
25
15
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
OUTPUT LOW VOLTAGE
vs. TEMPERATURE
330
ISINK = 4mA
328
326
324
322
320
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
OUTPUT SHORT-CIRCUIT (SINK) CURRENT
vs. TEMPERATURE
50
45
40
35
-40
140
-20 0 20 40 60 80
TEMPERATURE (°C)
INPUT BIAS CURRENT
vs. TEMPERATURE
100
120
100
80
60
40
20
0
-50
-25 0 25 50 75
TEMPERATURE (°C)
100
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Maxim Integrated 4

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MAX9140/MAX9141/
MAX9142/MAX9144
40ns, Low-Power, 3V/5V, Rail-to-Rail
Single-Supply Comparators
Typical Operating Characteristics (continued)
(VCC = 3.0V, VCM = 0V, CL = 15pF, VOD = 10mV, TA = +25°C, unless otherwise noted.)
500
400
300
200
100
0
-100
-200
-300
-400
-500
-50
7
6
5
INPUT OFFSET VOLTAGE
vs. TEMPERATURE
-25 0 25 50 75
TEMPERATURE (°C)
INPUT VOLTAGE RANGE
vs. TEMPERATURE
100
VCMR+
VCC = 5.5V
4
3
2
1
0
-1
-40
50
VCMR-
-20 0 20 40 60 80
TEMPERATURE (°C)
PROPAGATION DELAY
vs. TEMPERATURE
100
45
tPD+
40
tPD-
35
30
25
-50
-25 0 25 50 75
TEMPERATURE (°C)
100
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-50
45
TRIP POINT
vs. TEMPERATURE
VTRIP+
VTRIP-
-25 0 25 50 75
TEMPERATURE (°C)
PROPAGATION DELAY
vs. INPUT OVERDRIVE
100
40
tPD+
35
tPD-
30
25
20
0
20 40 60 80
INPUT OVERDRIVE (mV)
100
PROPAGATION DELAY
vs. CAPACITIVE LOAD
55
50
45 tPD+
40
35 tPD-
30
25
20
15
30 45 60 75 90
CAPACITIVE LOAD (pF)
105
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Maxim Integrated 5