19-0450; Rev 3; 2/03
Ultra-Low-Power, Open-Drain,
Single/Dual-Supply Comparators
General Description
Features
The MAX971–MAX974 and MAX981–MAX984 single/
dual/quad low-voltage comparators feature the lowest
power consumption available. These micropower
devices draw less than 4µA supply current over
temperature (MAX971/MAX972/MAX981/MAX982), and
include an internal 1.182V 1ꢀ (MAX971/MAX97ꢁ/
MAX974) or 2ꢀ (MAX981–MAX984) voltage reference
and programmable hysteresis.
ꢀ Available in Ultra-Small Packages:
UCSP™ (MAX972)
µMAX (MAX9_1/MAX9_2/MAX9_3)
ꢀ Ultra-Low Quiescent Current (4µA, max)
Over Extended Temp Range (MAX971/MAX981)
ꢀ Power Supplies:
Single 2.5V to 11V
Dual 1.25V to 5.5V
Ideal for ꢁV or 5V single-supply applications, these
devices operate from a single 2.5V to 11V supply (or
1.25V to 5.5V dual supplies), and each comparatorꢂs
input voltage ranges from the negative supply rail to within
1.ꢁV of the positive supply.
ꢀ Input Voltage Range Includes Negative Supply
ꢀ Internal Bandgap Reference
1.182V 1% (MAX97_)
1.182V 2% (MAX98_)
The single MAX971/MAX981 and the dual MAX97ꢁ/
MAX982/MAX98ꢁ provide a unique, simple method for
adding hysteresis without feedback or complicated
equations, simply by using the HYST pin plus two
resistors.
ꢀ 12µs Propagation Delay (10mV Overdrive)
ꢀ Output Has Separate GND Pin (MAX9_1/MAX9_4)
Applications
Battery-Powered
Systems
Window Comparators
Level Translators
The MAX971–MAX974 and MAX981–MAX984ꢂs open-
drain outputs permit wire-ORed configurations. Thanks to
an 11V output range and separate GND pin for the output
transistor (MAX971/MAX974, MAX981/MAX984), these
devices are ideal for level translators and bipolar to single-
ended converters. For similar devices with complementary
output stages, see the MAX921–MAX924 (1ꢀ reference)
and the MAX9ꢁ1–MAX9ꢁ4 (2ꢀ reference).
Threshold Detectors
Oscillator Circuits
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
8 Plastic Dip
8 SO
MAX971CPA
MAX971CSA
MAX971CUA
0°C to +70°C
0°C to +70°C
0°C to +70°C
8 µMAX
Ordering Information continued at end of data sheet.
Typical Operating Circuit
V
IN
8-Pin
DIP/SO/µMAX
MAX971
MAX972
MAX97ꢁ
MAX974
MAX981
MAX982
MAX98ꢁ
MAX984
1ꢀ
None
1ꢀ
1
2
2
4
1
2
2
4
Yes
No
7
V+
8-Pin UCSP/
DIP/SO/µMAX
3
IN+
8-Pin
DIP/SO/µMAX
OUT 8
Yes
No
4 IN-
1ꢀ
16-Pin DIP/SO
HYST
5
8-Pin
DIP/SO/µMAX
2ꢀ
Yes
Yes
Yes
No
MAX971
MAX981
6 REF
8-Pin
DIP/SO/µMAX
2ꢀ
GND
1
V-
2
8-Pin
DIP/SO/µMAX
2ꢀ
THRESHOLD DETECTOR
UCSP is a trademark of Maxim Integrated Products, Inc.
2ꢀ
16-Pin DIP/SO
________________________________________________________________________________________
1
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.
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