General Description

The MAX4635/MAX4636 are fast, dual 4

Ω single-

pole/double-throw (SPDT) analog switches that operate

with supply voltages from +1.8V to +5.5V. High switch-

ing speeds, 1

Ω on-resistance flatness, and low power

consumption make these devices ideal for audio/video,

communications, and battery-operated devices.

Containing two independently controllable SPDT

switches in 10-pin µMAX and 10-pin 3mm x 3mm thin

QFN packages, the MAX4635/MAX4636 use little board

space, and have low power consumption ensuring min-

imal impact on your power budget. The analog signal

range extends to the supply rails. The MAX4635 has

inverted logic compared to the MAX4636.

________________________Applications

Battery-Powered Equipment

Relay Replacement

Audio and Video Signal Routing

Low-Voltage Data-Acquisition Systems

Sample-and-Hold Circuits

Communications Circuits

Features

o Guaranteed On-Resistance

4

Ω (max) +5V Supply

5.5

Ω (max) +3V Supply

o Guaranteed Match Between Channels

0.2

Ω (max)

o Guaranteed Flatness Over Signal Range

1

Ω (max) with +5V Supply

o Fast Switching Speeds

14ns (max) Turn-On Time

6ns (max) Turn-Off Time

o 1.8V Operation

100

Ω (typ) On-Resistance Over Temperature

56ns (typ) Turn-On Time

17ns (typ) Turn-Off Time

o +1.8V to +5.5V Single-Supply Operation

o Low Crosstalk: -67dB at 1MHz

o High Off-Isolation: -65dB at 1MHz

o THD: 0.1%

Fast, Low-Voltage, Dual 4

Ω SPDT

CMOS Analog Switches

________________________________________________________________ Maxim Integrated Products

1

1

2

3

4

5

10

9

8

7

6

COM1

NO1

V+

NO2

NC2

GND

NC1

IN1

MAX4636

µMAX

TOP VIEW

COM2

IN2

1

2

3

4

5

10

9

8

7

6

COM1

NC1

V+

NC2

NO2

GND

NO1

IN1

MAX4635

µMAX

COM2

IN2

1

2

3

4

5

10

9

8

7

6

COM1

NO1

V+

NO2

NC2

GND

NC1

IN1

MAX4636

3 x 3 THIN QFN

COM2

IN2

1

2

3

4

5

10

9

8

7

6

COM1

NC1

V+

NC2

NO2

GND

NO1

IN1

MAX4635

3 x 3 THIN QFN

COM2

IN2

0

SWITCHES SHOWN FOR "0" INPUT

1

OFF

ON

ON

OFF

IN_

NO_ TO COM_ NC_ TO COM_

Pin Configuration/Functional Diagram/Truth Table

19-1709; Rev 2; 5/03

Ordering Information

PART

TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX4635EUB

-40°C to +85°C

10 µMAX

—

MAX4635ETB

-40°C to +85°C

10 Thin

QFN (3

AAT

MAX4636EUB

-40°C to +85°C

10 µMAX

—

MAX4636ETB

-40°C to +85°C

10 Thin

QFN (3

AAO

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.