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_______________General Description

The MAX335 analog switch with serial digital interface

offers eight separately controlled single-pole-single-

throw (SPST) switches. All switches conduct equally in

either direction, and on-resistance (100

Ω) is constant

over the analog signal range.

These CMOS switches can operate continuously with

power supplies ranging from ±4.5V to ±20V and handle

rail-to-rail analog signals. Upon power-up, all switches are

off, and the internal serial and parallel shift registers are

reset to zero. The MAX335 is equivalent to two DG211

quad switches but controlled by a serial interface.

The interface is compatible with the Motorola SPI inter-

face standard. Functioning as a shift register, this serial

interface allows data (at DIN) to be locked in synchro-

nous with the rising edge of clock (SCLK). The shift reg-

ister's output (DOUT) enables several MAX335s to be

daisy chained.

________________________Applications

Serial Data Acquisition and Process Control

Avionics

Signal Routing

Networking

____________________________Features

o 8 Separately Controlled SPST Switches

o SPI-Compatible Serial Interface

o Accepts ±15V Analog Swings

o Multiple Devices Can Be Daisy Chained

______________Ordering Information

Serial Controlled, 8-Channel SPST Switch

________________________________________________________________

Maxim Integrated Products

1

SCLK

V+

DIN

GND

NO0

COM0

NO1

COM1

NO2

COM2

NO3

COM3

DIP/SO

TOP VIEW

MAX335

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

CS

VL

DOUT

V-

NO7

COM7

NO6

COM6

NO5

COM5

NO4

COM4

__________________Pin Configuration

19-0220; Rev 2; 7/96

PART

TEMP. RANGE

PIN-PACKAGE

MAX335CNG

0°C to +70°C

24 Narrow Plastic DIP

MAX335CWG

0°C to +70°C

24 Wide SO

MAX335C/D

0°C to +70°C

Dice*

MAX335ENG

-40°C to +85°C

24 Narrow Plastic DIP

MAX335EWG

-40°C to +85°C

24 Wide SO

MAX335MRG

-55°C to +125°C

24 Narrow CERDIP**

* Contact factory for dice specifications.

** Contact factory for availability and processing to MIL-STD-883.

SPI is a trademark of Motorola Corp.

LATCH

NO0

COM0

8-BIT SHIFT REGISTER

CLOCK TRANSLATOR

CS TRANSLATOR

+5V TRANSLATOR

SCLK

CS

NO7

COM7

PARALLEL REGISTER AND TRANSLATOR

DOUT

MAX335

________________Functional Diagram