General Description

The MAX4735 quad-SPDT switch routes audio signals

in portable applications. Each channel has a 0.31

Ω typ-

ical on-resistance, allowing the MAX4735 to drive 8

Ω

loudspeakers with less than 0.02% distortion.

The MAX4735 is configured as a quad-SPDT switch with

two common control inputs. Each digital input controls

two pairs of SPDT switches. The switches are fully bidi-

rectional, allowing both multiplexing and demultiplexing

operation. Break-before-make operation is guaranteed.

The device operates from a +1.6V to +3.6V supply and

over the extended -40°C to +85°C temperature range. It

is offered in both 16-pin 3mm x 3mm TQFN and TSSOP

packages.

Applications

Cell Phones

Digital Still Cameras

PDAs and Palmtop Devices

MP3 Players

Features

♦ 0.06Ω On-Resistance Flatness

♦ Excellent 0.015Ω On-Resistance Matching

♦ Low 0.02% THD into 8Ω

♦ Low 0.015% THD into 32Ω

♦ Audio Signal Routing

♦ Space-Saving, 3mm x 3mm TQFN Package

♦ 1.8V Logic Compatible

Low-Voltage, 0.31

Ω, Quad-SPDT Analog Switch

________________________________________________________________ Maxim Integrated Products

1

16

15

14

13

9

10

11

12

COM3

NC3

NO4

COM4

4

3

2

1

COM2

NC2

NO1

COM1

56

7

8

MAX4735

TQFN

TOP VIEW

NOTE: EXPOSED PADDLE CONNECTED TO GND.

Pin Configurations

Ordering Information

PART

PIN-PACKAGE

TOP

MARK

PKG CODE

MAX4735ETE

16 TQFN

ACT

T1633-4

MAX4735EUE

16 TSSOP

—

U16-2

1.6V TO 3.6V

INTERNAL

8

Ω

SPEAKER

RING TONE/

MELODY IC

MAX4735

AUDIO

CODEC

SYSTEM

CONTROLLER

EXTERNAL

8

Ω OR 32Ω

SPEAKER

Typical Application Circuit

19-3581; Rev 0; 1/05

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.

Pin Configurations continued at end of data sheet.

Note: All products specified across the -40°C to +85°C tem-

perature range.