MAX942 Maxim Integrated Products, MAX942 Datasheet

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MAX942

Manufacturer Part Number
MAX942
Description
Manufacturer
Maxim Integrated Products
Datasheet

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The MAX941/MAX942/MAX944 are single/dual/quad
high-speed comparators optimized for systems pow-
ered from a 3V or 5V supply. These devices combine
high speed, low power, and Rail-to-Rail
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 fea-
tures 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 pack-
ages.
________________________Applications
19-0229; Rev 4; 9/01
Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
TOP VIEW
3V/5V Systems
Battery-Powered Systems
Threshold Detectors/Discriminators
Line Receivers
Zero-Crossing Detectors
Sampling Circuits
High-Speed, Low-Power, 3V/5V, Rail-to-Rail,
SHDN
IN +
IN-
V +
1
2
3
4
________________________________________________________________ Maxim Integrated Products
DIP/SO/µMAX
MAX941
General Description
8
7
6
5
N.C.
OUT
GND
LATCH
®
inputs.
OUTA
INA +
INA-
GND
Single-Supply Comparators
1
2
3
4
DIP/SO/µMAX
A
MAX942
o Available in µMAX Package
o Optimized for 3V and 5V Applications
o Fast, 80ns Propagation Delay (5mV overdrive)
o Rail-to-Rail Input Voltage Range
o Low Power:
o Low, 1mV Offset Voltage
o Internal Hysteresis for Clean Switching
o Outputs Swing 200mV of Power Rails
o CMOS/TTL-Compatible Outputs
o Output Latch (MAX941 only)
o Shutdown Function (MAX941 only)
____________________________Features
Ordering Information continued at end of data sheet.
MAX941CPA
MAX941CSA
MAX941EPA
MAX941ESA
MAX941EUA
(operation down to 2.7V)
1mW Power Dissipation per Comparator (3V)
350µA Supply Current
PART
B
8
7
6
5
V +
OUTB
INB-
INB +
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
0°C to +70°C
0°C to +70°C
Ordering Information
OUTA
OUTB
INA +
INA-
INB +
INB-
V +
Pin Configurations
1
2
3
4
5
6
7
A
B
DIP/SO
MAX944
PIN-PACKAGE
8 Plastic DIP
8 SO
8 Plastic DIP
8 SO
8 µMAX
C
D
14
13
12
11
10
9
8
OUTD
IND-
IND +
GND
INC +
INC-
OUTC
1

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MAX942 Summary of contents

Page 1

... Internal hysteresis ensures clean output switching, even with slow-moving input signals. The MAX941 fea- tures 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 pack- ages ...

Page 2

... MAX941EUA/MAX942EUA = V+ CM MAX94_C_ _, MAX94_EP_ MIN MAX94_ES_ to T MAX MAX941EUA/MAX942EUA MAX94_C = (Note 4) CM MAX94_E = MAX94_C_ _, MAX94_EP_, MAX94_ES_ MAX941EUA/MAX942EUA MAX94_C_ _, MAX94_EP_, MAX94_ES_ = 0 CM MAX941EUA/MAX942EUA = 400µA SOURCE = 4mA SOURCE = 400µA SINK = 4mA SINK = +25°C.) (Note 14) A MIN TYP MAX UNITS 2.7 6 ...

Page 3

... Note 12: Applies to the MAX941 only. Comparator is active with (see Figure 2). Note 13: Applicable to the MAX941 only. Comparator is active with low. Shutdown disable time is the delay when Note 14: The MAX941EUA and MAX942EUA are 100% production tested at T guaranteed by design. _______________________________________________________________________________________ Single-Supply Comparators CONDITIONS ...

Page 4

... CAPACITIVE LOAD (pF) OUTPUT HIGH VOLTAGE vs. SOURCE CURRENT 3 +125° +25°C 2 -55°C A 2.8 2.7 2.6 2 100 1000 10,000 SOURCE CURRENT (µA) MAX942 TOTAL SUPPLY CURRENT vs. SUPPLY VOLTAGE 800 T = +125°C A 700 T = +25°C A 600 500 T = -55°C A 400 300 SUPPLY VOLTAGE (V) ...

Page 5

High-Speed, Low-Power, 3V/5V, Rail-to-Rail, ____________________________Typical Operating Characteristics (continued) (V+ = 3.0V +25°C, unless otherwise noted.) A MAX944 TOTAL SUPPLY CURRENT vs. SUPPLY VOLTAGE 2.00 1. +125° +25°C A 1.25 1. ...

Page 6

... High-Speed, Low-Power, 3V/5V, Rail-to-Rail, Single-Supply Comparators _____________________________Typical Operating Characteristics (continued) (V+ = 3.0V +25°C, unless otherwise noted.) A PROPAGATION DELAY ( GND 20ns/div INPUT STEP = 100mV t PD+ ______________________________________________________________Pin Description PIN NAME MAX941 MAX942 MAX944 — OUTA — INA+ — — INB+ — — OUTB — ...

Page 7

... I 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. ...

Page 8

... __________Applications Information The high gain bandwidth of the MAX941/MAX942/ MAX944 requires design precautions to realize the comparators’ full high-speed capability. The recom- mended precautions are: , the source Use a printed circuit board with a good, unbro- ken, low-inductance ground plane. 2) Place a decoupling capacitor (a 0.1µF ceramic capacitor is a good choice) as close possible ...

Page 9

... Figure 5. 3.3V Digitally Controlled Threshold Detector _______________________________________________________________________________________ Single-Supply Comparators MAX941 V CC MAX942 MAX944 0 Figure 4. Output Stage Circuitry = 3.3V DD COAX LINE MAX941 Figure 6. Line Transceiver Application MAX941 MAX942 I MAX944 SOURCE I SINK 10kΩ 3V 20kΩ 0 MAX941 CLEAN DIGITAL SIGNAL 20kΩ OUTPUT ...

Page 10

... MAX944CSD 0°C to +70°C MAX944EPD -40°C to +85°C MAX944ESD -40°C to +85°C 10 ______________________________________________________________________________________ MAX941 TRANSISTOR COUNT: 192 PIN-PACKAGE MAX942 TRANSISTOR COUNT: 314 8 Plastic DIP 8 SO MAX944 TRANSISTOR COUNT: 620 8 Plastic DIP PROCESS: BiPolar µMAX 14 Plastic DIP Plastic DIP ...

Page 11

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 11 © 2001 Maxim Integrated Products ...

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