General Description

The MAX985/MAX986/MAX989/MAX990/MAX993/

MAX994 single/dual/quad micropower comparators

feature low-voltage operation and Rail-to-Rail® inputs

and outputs. Their operating voltages range from 2.5V

to 5.5V, making them ideal for both 3V and 5V systems.

These comparators also operate with ±1.25V to ±2.75V

dual supplies. They consume only 11µA of supply cur-

rent while achieving a 300ns propagation delay.

Input bias current is typically 1.0pA, and input offset

voltage is typically 0.5mV. Internal hysteresis ensures

clean output switching, even with slow-moving input

signals.

The output stage’s unique design limits supply-current

surges while switching, virtually eliminating the supply

glitches typical of many other comparators. The

MAX985/MAX989/MAX993 have a push-pull output

stage that sinks as well as sources current. Large inter-

nal output drivers allow rail-to-rail output swing with

loads up to 8mA. The MAX986/MAX990/MAX994 have

an open-drain output stage that can be pulled beyond

are ideal for level translators and bipolar to single-

ended converters.

The single MAX985 is available in a chip-scale pack-

age (UCSP™), significantly reducing the required PC

board area. The single MAX985/MAX986 are available

in 5-pin SC70 packages and the dual MAX989/MAX990

are available in 8-pin SOT23 packages.

____________________________Features

o 11µA Quiescent Supply Current

o 2.5V to 5.5V Single-Supply Operation

o Common-Mode Input Voltage Range Extends

250mV Beyond the Rails

o 300ns Propagation Delay

o Push-Pull Output Stage Sinks and Sources

8mA Current (MAX985/MAX989/MAX993)

(MAX986/MAX990/MAX994)

o Unique Output Stage Reduces Output Switching

Current, Minimizing Overall Power Consumption

o 80µA Supply Current at 1MHz Switching

Frequency

o No Phase Reversal for Overdriven Inputs

o Available in Space-Saving Packages:

UCSP (MAX985)

SOT23 (MAX985/MAX986/MAX989/MAX990)

µMAX (MAX989/MAX990)

Micropower, Low-Voltage, UCSP/SC70,

Rail-to-Rail I/O Comparators

________________________________________________________________ Maxim Integrated Products

1

TOP VIEW

(BUMPS ON BOTTOM)

UCSP

MAX985

B1

B2

B3

A1

A2

A3

IN+

IN-

N.C.

OUT

Pin Configurations

19-1229; Rev 3; 9/02

Ordering Information

Ordering Information continued at end of data sheet.

Typical Application Circuit appears at end of data sheet.

Rail-to-Rail is a registered trademark of Nippon Motorola Ltd.

Pin Configurations continued at end of data sheet.

Portable/Battery-

Powered Systems

Mobile Communications

Zero-Crossing Detectors

Window Comparators

Level Translators

Threshold Detectors/

Discriminators

Ground/Supply-Sensing

Applications

IR Receivers

Digital Line Receivers

PART

TEMP RANGE

PIN/BUMP-

PACKAGE

TOP

MARK

MAX985EBT-T*

-40°C to +85°C

6 UCSP-6

AAY

MAX985EXK-T

-40°C to +85°C

5 SC70-5

ABK

Applications

Selector Guide

PART

COMPARATORS

PER PACKAGE

OUTPUT

STAGE

MAX985

1

Push-Pull

MAX986

1

Open-Drain

MAX989

2

Push-Pull

MAX990

2

Open-Drain

MAX993

4

Push-Pull

MAX994

4

Open-Drain

UCSP is a trademark of Maxim Integrated Products, Inc.

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.

*UCSP reliability is integrally linked to the user’s assembly meth-

ods, circuit board material, and environment. Refer to the UCSP

Reliability section of this data sheet for more information.