DG428/429

Vishay Siliconix

Document Number: 70063

S-52433—Rev. J, 06-Sep-99

www.vishay.com

S FaxBack 408-970-5600

5-1

Single 8-Ch/Differential 4-Ch Latchable Analog Multiplexers

FEATURES

BENEFITS

APPLICATIONS

D Low Charge Injection: 1 pC

D On-Board TTL Compatible

Address Latches

D Break-Before-Make

D Low Power Consumption: 0.3 mW

D Improved System Accuracy

D Microprocessor Bus Compatible

D Easily Interfaced

D Reduced Crosstalk

D High Throughput

D Improved Reliability

D Data Acquisition Systems

D Automatic Test Equipment

D Avionics and Military Systems

D Communication Systems

D Microprocessor-Controlled

Analog Systems

D Medical Instrumentation

DESCRIPTION

The DG428/DG429 analog multiplexers have on-chip address

and control latches to simplify design in microprocessor based

applications. Break-before-make switching action protects

against momentary crosstalk of adjacent input signals.

The DG428 selects one of eight single-ended inputs to a

common output, while the DG429 selects one of four

differential inputs to a common differential output.

An on channel conducts current equally well in both directions.

In the off state each channel blocks voltages up to the power

supply rails. An enable (EN) function allows the user to reset

the multiplexer/demultiplexer to all switches off for stacking

(EN) are TTL compatible over the full specified operating

temperature range.

The silicon-gate CMOS process enables operation over a

wide range of supply voltages. The absolute maximum voltage

rating is extended to 44 V. Additionally, single supply operation

is also allowed and an epitaxial layer prevents latchup.

On-board TTL-compatible address latches simplify the digital

interface design and reduce board space in bus-controlled

systems such as data acquisition systems, process controls,

avionics, and ATE.

FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION

DG428

DG428

WR

D

RS

EN

V–

GND

V+

Dual-In-Line

Decoders/Drivers

1

2

3

4

5

6

7

8

18

17

16

15

14

13

12

11

Top View

910

Latches

PLCC

14

15

16

17

18

8

7

6

5

4

1

2

319

20

11

10

913

12

Top View

EN

V–

GND

V+

Latches

Decoders/Drivers