General Description

The MAX4645/MAX4646 single-pole, single-throw (SPST)

analog switches feature a 2.5

Ω typical on-resistance

Ω max) over the

specified signal range. Each switch can handle Rail-to-

+25°C. These analog switches are ideal in low-distortion

applications and are the preferred solution over mechani-

cal relays in automated test equipment or applications

where current switching is required. They have low power

requirements, require less board space, and are more

reliable than mechanical relays.

These switches operate from a +1.8V to +5V single sup-

ply, making them ideal for use in battery-powered applica-

tions. The MAX4645/MAX4646 have fast switching speeds

The MAX4645 is a normally open (NO) switch, and the

MAX4646 is a normally closed (NC) switch. Both are

available in 5-pin SOT23, 6-pin SOT23, and 8-pin µMAX

packages.

________________________Applications

Battery-Powered Systems

Audio and Video Signal Routing

Low-Voltage Data-Acquisition Systems

Sample-and-Hold Circuits

Communications Circuits

Relay Replacement

____________________________Features

o +1.8V to +5V Single-Supply Operation

2.5

Ω max (5V supply)

3.5

Ω max (3V supply)

o 1.8V Operation

Ω typ Over Temperature

o Guaranteed Low Leakage Currents

±0.25nA at +25°C

o Rail-to-Rail Output Capability

o TTL/CMOS-Logic Compatible

o -75dB Off-Isolation at 1MHz

o Low Distortion: 0.014% typ

Fast, Low-Voltage, 2.5

Ω, SPST,

CMOS Analog Switches

________________________________________________________________ Maxim Integrated Products

1

19-1653; Rev 1; 7/00

Ordering Information

Pin Configurations/Functional Diagrams/Truth Tables

µMAX/SO/DIP

PIN 5

5

XYZA

4

123

NOTE: SOT23-5 PACKAGE

HAS LETTERING NEAREST PIN 5.

TOP VIEW

IN

GND

1

5

V+

COM

MAX4645

2

3

4

SOT23-5

INPUT

0

1

SWITCH STATE

MAX4645

OFF

ON

MAX4646

ON

OFF

SWITCHES SHOWN FOR LOGIC 0 INPUT.

NO

µMAX/SO/DIP

IN

GND

1

5

V+

COM

MAX4646

2

3

4

SOT23-5

NC

MAX4645EUT-T

-40°C to +85°C

PART

TEMP. RANGE

MAX4645EUK-T

-40°C to +85°C

MAX4646EUK-T

-40°C to +85°C

MAX4646EUT-T

-40°C to +85°C

MAX4646EUA

-40°C to +85°C

MAX4645EUA

-40°C to +85°C

8 µMAX

6 SOT23-6

5 SOT23-5

8 µMAX

6 SOT23-6

5 SOT23-5

PIN-

PACKAGE

—

AAHM

ADOC

—

AAHL

ADOB

TOP

MARK

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

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

Pin Configurations/Functional Diagrams/

Truth Tables continued at end of data sheet.