General Description

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 ±1% (MAX971/MAX973/

MAX974) or ±2% (MAX981–MAX984) voltage reference

and programmable hysteresis.

Ideal for 3V 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 comparator’s

input voltage ranges from the negative supply rail to within

1.3V of the positive supply.

The single MAX971/MAX981 and the dual MAX973/

MAX982/MAX983 provide a unique, simple method for

adding hysteresis without feedback or complicated

equations, simply by using the HYST pin plus two

resistors.

The MAX971–MAX974 and MAX981–MAX984’s 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 (1% reference)

and the MAX931–MAX934 (2% reference).

Features

o Available in Ultra-Small Packages:

UCSP™ (MAX972)

µMAX (MAX9_1/MAX9_2/MAX9_3)

o Ultra-Low Quiescent Current (4µA, max)

Over Extended Temp Range (MAX971/MAX981)

o Power Supplies:

Single 2.5V to 11V

Dual ±1.25V to ±5.5V

o Input Voltage Range Includes Negative Supply

o Internal Bandgap Reference

1.182V ±1% (MAX97_)

1.182V ±2% (MAX98_)

o 12µs Propagation Delay (10mV Overdrive)

o Output Has Separate GND Pin (MAX9_1/MAX9_4)

Applications

Ultra-Low-Power, Open-Drain,

Single/Dual-Supply Comparators

________________________________________________________________________________________ 1

MAX971

MAX981

OUT

IN+

HYST

REF

V-

GND

V+

21

4

5

6

8

3

7

IN-

THRESHOLD DETECTOR

Typical Operating Circuit

19-0450; Rev 3; 2/03

Ordering Information continued at end of data sheet.

UCSP is a trademark of Maxim Integrated Products, Inc.

MAX971

1%

Yes

8-Pin

DIP/SO/µMAX

MAX972

None

No

8-Pin UCSP/

DIP/SO/µMAX

MAX973

1%

Yes

8-Pin

DIP/SO/µMAX

MAX974

1%

No

16-Pin DIP/SO

MAX981

2%

Yes

8-Pin

DIP/SO/µMAX

MAX982

2%

Yes

8-Pin

DIP/SO/µMAX

MAX983

2%

Yes

8-Pin

DIP/SO/µMAX

MAX984

2%

No

16-Pin DIP/SO

1

2

2

4

1

2

2

4

Ordering Information

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.

PART

TEMP RANGE

PIN-PACKAGE

MAX971CPA

0

°C to +70°C

8 Plastic Dip

MAX971CSA

0

°C to +70°C

8 SO

MAX971CUA

0

°C to +70°C

8 µMAX

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Systems

Threshold Detectors

Window Comparators

Level Translators

Oscillator Circuits