________________General Description

The MAX976/MAX978/MAX998 dual/quad/single, high-

speed, low-power comparators are optimized for

+3V/+5V single-supply applications. They achieve a

20ns propagation delay while consuming only 225µA

supply current per comparator. The MAX998 features a

low-power shutdown mode that places the output in a

high-impedance state and reduces supply current

to 1nA.

The MAX976/MAX978/MAX998 inputs have a common-

mode voltage range that extends 200mV below ground.

Their outputs are capable of rail-to-rail operation with-

out external pullup circuitry, making these devices ideal

for interface with CMOS/TTL logic. All inputs and out-

puts can tolerate a continuous short-circuit fault condi-

tion to either rail. The comparators’ internal hysteresis

ensures clean output switching, even with slow-moving

input signals.

For space-critical applications, the single MAX998 is

available in a 6-pin SOT23 package, the dual MAX976

MAX978 is available in a 16-pin QSOP package.

________________________Applications

Battery-Powered Systems

Threshold Detectors/Discriminators

3V Systems

IR Receivers

Digital Line Receivers

____________________________Features

♦ Single-Supply Operation Down to 2.7V

♦ 20ns Propagation Delay

♦ 225µA Supply Current

♦ 1nA Shutdown Supply Current

♦ Rail-to-Rail Outputs

♦ Ground-Sensing Inputs

♦ Internal Hysteresis Ensures Clean Switching

♦ Available in Space-Saving Packages

SOT23 (MAX998)

µMAX (MAX976)

QSOP (MAX978)

Single/Dual/Quad, SOT23, Single-Supply,

High-Speed, Low-Power Comparators

________________________________________________________________ Maxim Integrated Products

1

TOP VIEW

GND

IN-

IN+

16

5

SHDN

OUT

MAX998

SOT23

2

34

+ -

__________________Pin Configurations

SHDN

R1

R2

IR RECEIVER

OUT

0.1

μF

MAX998

GND

___________Typical Operating Circuit

19-1299; Rev 3; 3/09

PART*

MAX976ESA

MAX976EUA

MAX978ESE

16 Narrow SO

8 µMAX

8 SO

PIN-PACKAGE

SOT

TOP MARK

—

—

—

_______________Ordering Information

Pin Configurations continued at end of data sheet

µMAX a registered trademark of Maxim Integrated Products, Inc.

MAX978EEE

MAX998ESA

MAX998EUT-T

6 SOT23

8 SO

16 QSOP

—

—

AAAO

ature range.

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim's website at www.maxim-ic.com.