MAX941/MAX942/
MAX944
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
General Description
The MAX941/MAX942/MAX944 are single/dual/quad highspeed comparators optimized for systems powered from a
3V or 5V supply. These devices combine high speed, low
power, and rail-to-rail inputs. Propagation delay is 80ns,
while supply current is only 350μA per comparator.
The input common-mode range of the MAX941/MAX942/
MAX944 extends beyond both power-supply rails. The
outputs pull to within 0.4V 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 MAX941 features latch enable and device shutdown.
The single MAX941 and dual MAX942 are offered in a
tiny μMAX® package. Both the single and dual MAX942
are available in 8-pin DIP and SO packages. The quad
MAX944 comes in 14-pin DIP and narrow SO packages.
Applications
●●
●●
●●
●●
●●
●●
3V/5V Systems
Battery-Powered Systems
Threshold Detectors/Discriminators
Line Receivers
Zero-Crossing Detectors
Sampling Circuits
Features
●● Available in μMAX Package
●● Optimized for 3V and 5V Applications
(Operation Down to 2.7V)
●● Fast, 80ns Propagation Delay (5mV Overdrive)
●● Rail-to-Rail Input Voltage Range
●● Low 350μA Supply Current per Comparator
●● Low, 1mV Offset Voltage
●● Internal Hysteresis for Clean Switching
●● Outputs Swing 200mV of Power Rails
●● CMOS/TTL-Compatible Outputs
●● Output Latch (MAX941 Only)
●● Shutdown Function (MAX941 Only)
Ordering Information
PART
MAX941CPA
PINPACKAGE
TEMP RANGE
0°C to +70°C
8 PDIP
MAX941CSA
0°C to +70°C
8 SO
MAX941EPA
-40°C to +85°C
8 PDIP
MAX941ESA
-40°C to +85°C
8 SO
MAX941EUA-T
-40°C to +85°C
8 µMAX
MAX941AUA-T
-40°C to +125°C
8 µMAX
T = Tape and reel.
Ordering Information continued at end of data sheet.
μMAX is a registered trademark of Maxim Integrated Products, Inc.
Pin Configurations
TOP VIEW
MAX941
MAX942
OUTA 1
V+
1
8
N.C.
OUTA
1
8
V+
IN+
2
7
OUT
INA-
2
7
OUTB
IN- 3
6
GND
INA+ 3
6
INB-
SHDN 4
5
LATCH
GND 4
5
INB+
PDIP/SO/µMAX
A
B
PDIP/SO/µMAX
INA- 2
INA+ 3
14 OUTD
A
MAX944
V+ 4
INB+ 5
INB- 6
D
B
12 IND+
11 GND
C
OUTB 7
PDIP/SO
19-0229; Rev 10; 9/14
13 IND-
10 INC+
9
INC-
8
OUTC
MAX941/MAX942/
MAX944
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
Absolute Maximum Ratings
Power-Supply Ranges
Supply Voltage V+ to GND..............................................+6.5V
Differential Input Voltage..........................-0.3V to (V+ + 0.3V)
Common-Mode Input Voltage...................-0.3V to (V+ + 0.3V)
LATCH Input (MAX941 only)....................-0.3V to (V+ + 0.3V)
SHDN Control Input (MAX941 only) .........-0.3V to (V+ + 0.3V)
Current Into Input Pins......................................................±20mA
Continuous Power Dissipation (TA = +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)...727mW
8-Pin SO (derate 5.88mW/°C above +70°C)................471mW
8-Pin μMAX (derate 4.1mW/°C above +70°C).............330mW
14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)...800mW
14-Pin SO (derate 8.33mW/°C above +70°C)..............667mW
Operating Temperature Ranges
MAX94_C_ _.......................................................0°C to +70°C
MAX94_E_ _................................................... -40°C to +85°C
MAX94_AUA.................................................. -40°C to +125°C
MAX942MSA................................................. -55°C to +125°C
Storage Temperature Range............................. -65°C to +150°C
Lead Temperature (soldering, 10s).................................. +300°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 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
(V+ = 2.7V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 14)
PARAMETER
Positive Supply Voltage
Input Voltage Range
Input-Referred Trip
Points
Input Offset Voltage
Input Bias Current
Input Offset Current
Input Differential Clamp
Voltage
Common-Mode Rejection
Ratio
Power-Supply Rejection
Ratio
SYMBOL
VCMR
VTRIP
VOS
IB
IOS
VCLAMP
CMRR
PSRR
Output High Voltage
VOH
Output Low Voltage
VOL
Output Leakage Current
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CONDITIONS
V+
ILEAK
(Note 1)
VCM =
0V or
VCM = V+
(Note 2)
VCM =
0V or
VCM = V+
(Note 3)
TA = +25°C
TA = TMIN
to TMAX
TA = +25°C
MIN
MAX
UNITS
2.7
TYP
5.5
V
-0.2
V+ + 0.2
V
MAX94_C_ _, MAX94_EP_,
MAX94_ES_, MAX942MSA
1
3
MAX941_UA/MAX942_UA
1
4
MAX94_C_ _, MAX94_EP_,
MAX94_ES_, MAX942MSA
4
MAX941_UA/MAX942_UA
6
MAX94_C_ _, MAX94_EP_,
MAX94_ES_, MAX942MSA
1
2
MAX941_UA/MAX942_UA
1
3
MAX94_C_ _, MAX94_EP_,
MAX94_ES_, MAX942MSA
TA = TMIN
to TMAX
3
MAX941_UA/MAX942_UA
150
300
MAX94_E/A, MAX942MSA
150
400
VIN = VOS, VCM = 0V or V+
10
150
Force 100μA into IN+, IN- = GND,
measure VIN+ - VIN-, Figure 3
2.2
(Note 5)
2.7V ≤ V+ ≤ 5.5V,
VCM = 0V
mV
mV
80
300
MAX941_UA/MAX942_UA
80
800
MAX94_C_ _, MAX94_EP_,
MAX94_ES_, MAX942MSA
80
300
MAX941_UA/MAX942_UA
80
350
V+ - 0.4
V+ - 0.2
ISOURCE = 4mA
V+ - 0.4
V+ - 0.3
nA
nA
V
MAX94_C_ _, MAX94_EP_,
MAX94_ES_, MAX942MSA
ISOURCE = 400μA
μV/V
μV/V
V
ISINK = 400μA
0.2
0.4
ISINK = 4mA
0.3
0.4
(Note 6)
mV
5.5
MAX94_C
VIN = VOS, VCM = 0V or
VCM = V+ (Note 4)
mV
1
V
µA
Maxim Integrated │ 2
MAX941/MAX942/
MAX944
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
Electrical Characteristics (continued)
(V+ = 2.7V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 14)
PARAMETER
SYMBOL
CONDITIONS
V+ = 3V
Supply Current per
Comparator
ICC
V+ = 5V
MIN
TYP
MAX
MAX941
380
600
MAX942/MAX944
350
500
MAX941
430
700
MAX942/MAX944
400
600
12
60
MAX941
1.0
4.2
MAX942/MAX944
1.0
3.6
MAX94_C
80
150
MAX94_E/A, MAX942MSA
80
200
MAX941 only, shutdown mode (V+ = 3V)
Power Dissipation per
Comparator
UNITS
μA
PD
(Note 7)
Propagation Delay
tPD+,
tPD-
(Note 8)
Differential Propagation
Delay
dtPD
(Note 9)
10
ns
(Note 10)
10
ns
Propagation Delay Skew
Logic-Input Voltage High
VIH
(Note 11)
Logic-Input Voltage Low
VIL
(Note 11)
Logic-Input Current
Data-to-Latch Setup Time
Latch-to-Data Hold Time
IIL, IIH
V+/2 + 0.4
mW
ns
V
V+/2 - 0.4
10
V
VLOGIC = 0V or V+ (Note 11)
2
µA
tS
(Note 12)
20
ns
tH
(Note 12)
30
ns
Latch Pulse Width
tLPW
MAX941 only
50
ns
Latch Propagation Delay
tLPD
MAX941 only
70
ns
Shutdown Time
(Note 13)
3
ns
Shutdown Disable Time
(Note 13)
10
ns
Note 1: Inferred from the 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 2: 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 3: VOS is defined as the center of the input-referred hysteresis zone (see Figure 1).
Note 4: The polarity of IB reverses direction as VCM approaches either supply rail. See Typical Operating Characteristics for more
detail.
Note 5: Specified over the full common-mode range (VCMR).
Note 6: Applies to the MAX941 only when in shutdown mode. Specification is for current flowing into or out of the output pin for
VOUT driven to any voltage from V+ to GND.
Note 7: Typical power dissipation specified with V+ = 3V; maximum with V+ = 5.5V.
Note 8: Parameter is guaranteed by design and specified with VOD = 5mV and CLOAD = 15pF in parallel with 400μA of sink or
source current. VOS is added to the overdrive voltage for low values of overdrive (see Figure 2).
Note 9: Specified between any two channels in the MAX942/MAX944.
Note 10: Specified as the difference between tPD+ and tPD- for any one comparator.
Note 11: Applies to the MAX941 only for both SHDN and LATCH pins.
Note 12: Applies to the MAX941 only. Comparator is active with LATCH pin driven high and is latched with LATCH pin driven low
(see Figure 2).
Note 13: Applicable to the MAX941 only. Comparator is active with SHDN pin driven high and is in shutdown with SHDN pin driven
low. Shutdown disable time is the delay when SHDN is driven high to the time the output is valid.
Note 14: The MAX941_UA and MAX942_UA are 100% production tested at TA = +25°C. Specifications over temperature are
guaranteed by design.
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Maxim Integrated │ 3
MAX941/MAX942/
MAX944
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
Typical Operating Characteristics
(V+ = 3.0V, TA = +25°C, unless otherwise noted.)
50
RS = 10Ω
CLOAD = 15pF
25
75
50
100
80
RS = 10Ω
CLOAD = 15pF
VOD = 5mV
-60 -40 -20 0
60
RS = 10Ω
CLOAD = 15pF
VOD = 5mV
2
MAX941 toc07
TA = +25°C
3
4
5
10
100
1000
SINK CURRENT (µA)
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10,000
500
400
TA = +125°C
TA = +25°C
TA = -55°C
2.8
2.7
2.5
6
1
TA = +125°C
500
TA = +25°C
400
300
TA = -55°C
200
0
10
3
4
5
SUPPLY VOLTAGE (V)
1000
10,000
MAX942 TOTAL SUPPLY CURRENT
vs. SUPPLY VOLTAGE
800
TA = +125°C
700
TA = +25°C
600
500
TA = -55°C
400
2
100
SOURCE CURRENT (µA)
100
TA = +125°C
300
200
2.6
MAX941 TOTAL SUPPLY CURRENT
vs. SUPPLY VOLTAGE
600
SUPPLY CURRENT (µA)
VOL (V)
TA = -55°C
100
OUTPUT HIGH VOLTAGE vs.
SOURCE CURRENT
SUPPLY VOLTAGE (V)
0.3
1
0
50
30
OUTPUT LOW VOLTAGE
vs. SINK CURRENT
0
RS = 10Ω
VOD = 5mV
3.0
tPD-
70
TEMPERATURE (°C)
0.1
tPD-
2.9
80
40
0.4
100
CAPACITIVE LOAD (pF)
tPD+
90
20 40 60 80 100 120 140
120
60
100k
10k
PROPAGATION DELAY vs.
SUPPLY VOLTAGE
90
0.2
1k
PROPAGATION DELAY vs.
TEMPERATURE
100
0.5
100
MAX941 toc03
MAX941 toc02
10
SOURCE IMPEDANCE (Ω)
PROPAGATION DELAY (ns)
PROPAGATION DELAY (ns)
100
110
60
50
140
80
INPUT OVERDRIVE (mV)
120
70
CLOAD = 15pF
VOD = 5mV
100
MAX941 toc04
130
150
SUPPLY CURRENT (µA)
0
tPD-
VOH (V)
40
200
tPD+
MAX941 toc06
60
250
160
6
MAX941 toc09
tPD-
tPD+
MAX941 toc08
70
300
PROPAGATION DELAY vs.
CAPACITIVE LOAD
180
PROPAGATION DELAY (ns)
tPD+
80
350
PROPAGATION DELAY (ns)
PROPAGATION DELAY (ns)
90
30
400
MAX941 toc01
100
PROPAGATION DELAY vs.
SOURCE IMPEDANCE
MAX941 toc05
PROPAGATION DELAY vs.
INPUT OVERDRIVE
300
2
3
4
5
SUPPLY VOLTAGE (V)
6
Maxim Integrated │ 4
MAX941/MAX942/
MAX944
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
Typical Operating Characteristics (continued)
(V+ = 3.0V, TA = +25°C, unless otherwise noted.)
1.50
TA = +25°C
1.25
1.00
2
1
0
VCM-
TA = -55°C
-1
4
5
SUPPLY VOLTAGE (V)
-60 -40 -20
6
0
VOS
-500
VTRIP-
-1000
-1500
-2000
VCM = 0
-60 -40 -20
40
SHUTDOWN SUPPLY CURRENT (µA)
200
OUTPUT SHORTED
TO GND (SOURCING)
-60 -40 -20
IB100
250
TA = -55°C
200
TA = +25°C
100
VIN+ = VINNEGATIVE VALUES
REPRESENT CURRENT
FLOWING INTO THE
DEVICE
TA = +125°C
50
V+ = 6V
0
50
-50
IOS
-60 -40 -20
-100
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
0
1
2
3
4
5
COMMON-MODE VOLTAGE (V)
10MHz RESPONSE
30
VOS
20
V+
6
MAX941 toc17
INPUT
50mV/div
OUTPUT
1V/div
V+ = 2.7V
10
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
INPUT BIAS CURRENT (IB+, IB-)
vs. COMMON-MODE VOLTAGE
150
150
MAX941 SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
V+ = 6.0V
10
0
20 40 60 80 100 120 140
IB+
0
0 20 40 60 80 100 120 140
TEMPERATURE (°C)
20
INPUT BIAS CURRENT/INPUT OFFSET
CURRENT vs. TEMPERATURE
250
INPUT BIAS / OFFSET CURRENT (nA)
500
TRIP POINTS / VOS (µV)
MAX941 toc13
VTRIP+
30
TEMPERATURE (°C)
VOLTAGE TRIP POINTS/INPUT OFFSET
VOLTAGE vs. TEMPERATURE
1000
0
IB+, IB- (nA)
3
MAX941-14
2
OUTPUT SHORTED
TO V+ (SINKING)
MAX941 toc16
0.75
MAX941 toc12
VCM+
3
40
MAX941 toc15
INPUT VOLTAGE RANGE (V)
TA = +125°C
V+ = 3.0V
SHORT-CIRCUIT OUTPUT CURRENT
vs. TEMPERATURE
SHORT-CIRCUIT OUTPUT CURRENT (mA)
1.75
SUPPLY CURRENT (mA)
4
MAX941 toc10
2.00
INPUT VOLTAGE RANGE
vs. TEMPERATURE
MAX941 toc11
MAX944 TOTAL SUPPLY CURRENT
vs. SUPPLY VOLTAGE
GND
0
-60 -40 -20
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0 20 40 60 80 100 120 140
TEMPERATURE (°C)
50ns/div
Maxim Integrated │ 5
MAX941/MAX942/
MAX944
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
Typical Operating Characteristics (continued)
(V+ = 3.0V, TA = +25°C, unless otherwise noted.)
PROPAGATION DELAY (tPD+)
PROPAGATION DELAY (tPD-)
MAX941 toc18
MAX941 toc19
INPUT
50mV/div
VOD
VOS
V+
INPUT
50mV/div
VOS
VOD
V+
OUTPUT
1V/div
V+
2
GND
OUTPUT
1V/div
V+
2
GND
20ns/div
tPD+
INPUT STEP = 100mV
VOD = +5mV
20ns/div
tPD-
INPUT STEP = 100mV
VOD = -5mV
Pin Description
PIN
NAME
FUNCTION
MAX941
MAX942
MAX944
—
1
1
—
2
2
INA-
Comparator A Inverting Input
—
3
3
INA+
Comparator A Noninverting Input
1
8
4
V+
—
5
5
INB+
Comparator B Noninverting Input
—
6
6
INB-
Comparator B Inverting Input
—
7
7
OUTB
Comparator B Output
—
—
8
OUTC
Comparator C Output
—
—
9
INC-
Comparator C Inverting Input
—
—
10
INC+
Comparator C Noninverting Input
6
4
11
GND
Ground
—
—
12
IND+
Comparator D Noninverting Input
—
—
13
IND-
Comparator D Inverting Input
—
—
14
OUTD
2
—
—
IN+
Noninverting Input
3
—
—
IN-
Inverting Input
4
—
—
SHDN
Shutdown: MAX941 is active when SHDN is driven high; MAX941 is in shutdown
when SHDN is driven low.
5
—
—
LATCH
The output is latched when LATCH is low. The latch is transparent when LATCH
is high.
7
—
—
OUT
Comparator Output
8
—
—
N.C.
No Connection. Not internally connected.
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OUTA
Comparator A Output
Positive Supply (V+ to GND must be ≤ 6.5V)
Comparator D Output
Maxim Integrated │ 6
MAX941/MAX942/
MAX944
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
fixed internal hysteresis eliminates these resistors and the
equations needed to determine appropriate values.
VTRIP+
VHYST
VTRIP-
VIN+
VOS =
VTRIP+ + VTRIP-
VIN- = 0V
2
VOH
COMPARATOR
OUTPUT
VOL
Figure 1. Input and Output Waveform, Noninverting Input
Varied
Detailed Description
The MAX941/MAX942/MAX944 single-supply comparators feature internal hysteresis, high speed, and low
power. Their outputs are guaranteed to pull within 0.4V
of either supply rail without external pullup or pulldown
circuitry. Rail-to-rail input voltage range and low-voltage
single-supply operation make these devices ideal for portable equipment. The MAX941/MAX942/MAX944 interface directly to CMOS and TTL logic.
Timing
Most high-speed comparators oscillate in the linear
region because of noise or undesired parasitic feedback.
This tends to occur when the voltage on one input is at
or equal to the voltage on the other input. To counter
the parasitic effects and noise, the MAX941/MAX942/
MAX944 have internal hysteresis.
The hysteresis in a comparator 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 MAX941/MAX942/MAX944’s
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Figure 1 illustrates the case where IN- is fixed and IN+ is
varied. If the inputs were reversed, the figure would look
the same, except the output would be inverted.
The MAX941 includes an internal latch that allows storage of comparison results. The LATCH pin has a high
input impedance. If LATCH is high, the latch is transparent (i.e., the comparator operates as though the latch
is not present). The comparator’s output state is stored
when LATCH is pulled low. All timing constraints must be
met when using the latch function (Figure 2).
Shutdown Mode (MAX941 Only)
The MAX941 shuts down when SHDN is low. When shut
down, the supply current drops to less than 60μA, and the
three-state output becomes high impedance. The SHDN
pin has a high input impedance. Connect SHDN to V+ for
normal operation. Exit shutdown with LATCH high; otherwise, the output will be indeterminate.
Input Stage Circuitry
The MAX941/MAX942/MAX944 include internal protection circuitry that prevents damage to the precision input
stage from large differential input voltages. This protection
circuitry consists of two back-to-back diodes between IN+
and IN- as well as two 4.1kΩ resistors (Figure 3). The
diodes limit the differential voltage applied to the internal
circuitry of the comparators to be no more than 2VF,
where VF is the forward voltage drop of the diode (about
0.7V at +25°C).
For a large differential input voltage (exceeding 2VF), this
protection circuitry increases the input bias current at IN+
(source) and IN- (sink).
Input Current =
(IN + − IN− ) − 2VF
2 x 4.1kΩ
Input current with large differential input voltages should
not be confused with input bias current (IB). As long as the
differential input voltage is less than 2VF, this input current is equal to IB. The protection circuitry also allows for
the input common-mode range of the MAX941/MAX942/
MAX944 to extend beyond both power-supply rails. The
output is in the correct logic state if one or both inputs are
within the common-mode range.
Maxim Integrated │ 7
MAX941/MAX942/
MAX944
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
tS
tH
V+
DIFFERENTIAL
INPUT
VOLTAGE
VOS
0V
tLPW
V+
LATCH
V+
2
0V
VOH
OUT
tPD
tLPD
V+
2
VOL
Figure 2. MAX941 Timing Diagram with Latch Operator
Output Stage Circuitry
The MAX941/MAX942/MAX944 contain a current-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 maintaining the VOH or VOL
static condition. This significant 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 will slow down a voltage output transition. This can be useful in noisesensitive
applications where fast edges may cause interference.
Applications Information
Circuit Layout and Bypassing
The high gain bandwidth of the MAX941/MAX942/
MAX944 requires design precautions to realize the comparators’ full high-speed capability. The recommended
precautions are:
1) Use a printed circuit board with a good, unbroken, lowinductance ground plane.
2) Place a decoupling capacitor (a 0.1μF ceramic capacitor is a good choice) as close to V+ as possible.
3) Pay close attention to the decoupling capacitor’s bandwidth, keeping leads short.
4) On the inputs and outputs, keep lead lengths short to
avoid unwanted parasitic feedback around the comparators.
5) Solder the device directly to the printed circuit board
instead of using a socket.
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Maxim Integrated │ 8
MAX941/MAX942/
MAX944
IN+
4.1kΩ
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
TO INTERNAL
CIRCUITRY
MAX941
MAX942
MAX944
VCC
MAX941
MAX942
MAX944
ISOURCE
OUTPUT
TO INTERNAL
CIRCUITRY
IN–
4.1kΩ
ISINK
0
Figure 3. Input Stage Circuitry
Figure 4. Output Stage Circuitry
VDD = 3.3V
V+ = 3V
SERIAL
DIGITAL
INPUT
VREFC
VDD
10kΩ
SDI
8-BIT DAC
COAX LINE
MAX512
20kΩ
3V
MAX941
DACOUTC
GND
VSS
MAX941
0V
CLEAN
DIGITAL
SIGNAL
20kΩ
ANALOG IN
Figure 5. 3.3V Digitally Controlled Threshold Detector
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Figure 6. Line Transceiver Application
Maxim Integrated │ 9
MAX941/MAX942/
MAX944
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
Ordering Information (continued)
PART
TEMP RANGE
PINPACKAGE
MAX942MSA/PR
-55°C to +125°C
8 SO
MAX942CPA
0°C to +70°C
8 PDIP
MAX942CSA
0°C to +70°C
8 SO
MAX942EPA
-40°C to +85°C
8 PDIP
MAX942ESA
-40°C to +85°C
8 SO
MAX942EUA-T
-40°C to +85°C
8 µMAX
MAX942AUA-T
-40°C to +125°C
8 µMAX
MAX944CPD
0°C to +70°C
14 PDIP
MAX944CSD
0°C to +70°C
14 SO
MAX944EPD
-40°C to +85°C
14 PDIP
MAX944ESD
-40°C to +85°C
14 SO
Chip Information
PROCESS: BIPOLAR
T = Tape and reel.
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Maxim Integrated │ 10
MAX941/MAX942/
MAX944
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
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.
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
LAND PATTERN NO.
8 μMAX
U8-1
21-0036
90-0092
8 PDIP
P8-1
21-0043
—
8 SO
S8-2
21-0041
90-0096
14 PDIP
P14-3
21-0043
—
14 SO
S14-1
21-0041
90-0112
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Maxim Integrated │ 11
MAX941/MAX942/
MAX944
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
Single-Supply Comparators
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
CHANGED
8
12/08
Added SO package diagram and removed transistor count
10
9
3/09
Corrected Ordering Information for MAX944ESD
10
10
9/14
Corrected Electrical Characteristics and removed automotive reference from Features
1, 3
DESCRIPTION
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.
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 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.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
© 2014 Maxim Integrated Products, Inc. │ 12
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