General Description

The MAX9021/MAX9022/MAX9024 single/dual/quad

comparators are optimized for low-power consumption

while still providing a fast output response. They are

designed for single-supply applications from 2.5V to

5.5V, but can also operate from dual supplies. These

comparators have a 3µs propagation delay and con-

sume 2.8µA of supply current per comparator over the

-40°C to +125°C operating temperature range. The

combination of low-power, single-supply operation

down to 2.5V, and ultra-small footprint makes these

devices ideal for portable applications.

The MAX9021/MAX9022/MAX9024 have 4mV of built-in

hysteresis to provide noise immunity and prevent oscil-

lations even with a slow-moving input signal. The input

common-mode range extends from the negative supply

to within 1.1V of the positive supply. The design of the

comparator-output stage substantially reduces switch-

ing current during output transitions, eliminating power-

supply glitches.

The MAX9021 single comparator is available in tiny 5-

pin SC70 and SOT23 packages. The MAX9022 dual

comparator is available in 8-pin SOT23, µMAX, and SO

packages, and the MAX9024 quad comparator is avail-

able in 14-pin TSSOP and SO packages.

Applications

Features

o Low-Cost Solution Available in Space-Saving

SC70 Packages (Half the Size of SOT23)

o Low 2.8µA Supply Current

o 3µs Propagation Delay

o Internal 4mV Comparator Hysteresis

o 2.5 to 5.5V Single-Supply Voltage Range

o No Phase Reversal for Overdriven Inputs

o Space-Saving Packages

5-Pin SC70 (MAX9021)

8-Pin SOT23 (MAX9022)

8-Pin µMAX (MAX9022)

14-Pin TSSOP (MAX9024)

Micropower, Ultra-Small, Single/Dual/Quad,

Single-Supply Comparators

________________________________________________________________ Maxim Integrated Products

1

TOP VIEW

OUT

IN-

15

IN+

MAX9021

SC70/SOT23

2

34

INB-

INB+

1

2

8

7

OUTB

INA-

INA+

OUTA

S0T23/

µMAX/SO

3

4

6

5

MAX9022

14

13

12

11

10

9

8

1

2

3

4

5

6

7

OUTD

IND-

IND+

INA+

INA-

OUTA

MAX9024

INC+

INC-

OUTC

OUTB

INB-

INB+

TSSOP/SO

Pin Configurations

19-1842; Rev 1; 7/01

Ordering Information

Battery-Powered

Portable Systems

Mobile Communications

Sensor-Signal Detection

Photodiode Preamps

Digital Line Receivers

Keyless Entry Systems

Threshold Detectors/

Discriminators

Typical Application Circuit appears at end of data sheet.

PART

TEMP RANGE

PIN-PACKAGE

MAX9021AXK-T

-40

°C to +125°C

5 SC70-5

MAX9021AUK-T

-40

°C to +125°C

5 SOT23-5

MAX9022AKA-T

-40

°C to +125°C

8 SOT23-8

MAX9022AUA

-40

°C to +125°C

8 µMAX

MAX9022ASA

-40

°C to +125°C

8 SO

MAX9024AUD

-40

°C to +125°C

14 TSSOP

MAX9024ASD

-40

°C to +125°C

14 SO

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.