General Description

The MAX9644/MAX9645/MAX9646 are small, single com-

parators, ideal for a wide variety of portable electronics

applications such as cell phones, media players, and

notebooks that have extremely tight board space and

power constraints. These comparators are offered in both

a miniature 4-bump UCSP™ package with a 1mm x 1mm

footprint (as small as two 0402 resistors) and a

5-pin SOT23 package.

The ICs feature an input voltage range of -0.3V to

+5.5V, independent of supply voltage. These devices

maintain high impedance at the inputs even when pow-

nal filtering to provide high RF immunity.

The ICs have an internal 0.2V reference. These devices

feature either a push-pull or an open-drain output. They

consume only 700nA (max) supply current and operate

perature range.

Applications

Cell Phones

Portable Media Players

Electronic Toys

Notebook Computers

Portable Medical Devices

Features

o Tiny, 1mm x 1mm x 0.6mm 4-Bump UCSP

Footprint = Two 0402 Resistors

Also Available in a 5-Pin SOT23 Package

o Ultra-Low Operating Current (700nA max)

o -0.3V to +5.5V Input Voltage Range

o Internal 0.2V Reference Trimmed to 1% Accuracy

o 15µs Propagation Delay

o -40°C to +85°C Extended Temperature Range

Low-Power Comparators with Precision

Reference in 4-Bump UCSP

________________________________________________________________

Maxim Integrated Products

1

19-5803; Rev 1; 10/11

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.

EVALUATION

KIT

AVAILABLE

Ordering Information

PART

PIN-PACKAGE

TOP MARK

MAX9644EBS+G45

4 UCSP

+AGL

MAX9644EUK+

5 SOT23

+AFJN

MAX9645EBS+G45

4 UCSP

+AGM

MAX9645EUK+

5 SOT23

+AFJO

MAX9646EBS+G45

4 UCSP

+AGN

MAX9646EUK+

5 SOT23

+AFJP

Note: All devices are specified over the extended -40°C to

+85°C operating temperature range.

+

Denotes a lead(Pb)-free/RoHS-compliant package.

G45

= Protective die coating.

UCSP is a trademark of Maxim Integrated Products, Inc.

PART

REFERENCE VOLTAGE (V)

INPUT

OUTPUT

MAX9644

0.2

Noninverting

Open drain

MAX9645

0.2

Inverting

Open drain

MAX9646

0.2

Noninverting

Push-pull

Selector Guide