*Common to Substrate and Case

Flat Package

V+

V−*

1

2

3

4

5

6

7

14

13

12

11

10

9

8

Top View

NC

Dual-In-Line

V−

V+

NC

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

Top View

Refer to JAN38510 Information, Military Section

DG189/190/191

Vishay Siliconix

Document Number: 70034

S-51140—Rev. D, 20-Jun-05

www.vishay.com

1

High-Speed Drivers with Dual SPDT JFET Switches

FEATURES

BENEFITS

APPLICATIONS

D Constant On-Resistance Over

Entire Analog Range

D Low Leakage

D Low Crosstalk

D Rad Hardness

D Low Distortion

D Eliminates Large Signal Errors

D High Precision

D High Bandwidth Capability

D Fault Protection

D Audio Switching

D Video Switching

D Sample/Hold

D Guidance and Control Systems

D Aerospace

DESCRIPTION

The DG189/190/191 are precision dual single-pole,

double-throw (SPDT) analog switches designed to provide

accurate switching of video and audio signals. This series is

ideally suited for applications requiring a constant

on-resistance over the entire analog range.

The major difference in the devices is the on-resistance

(DG189—10 W, DG190—30 W, DG191—75 W). Reduced

< 2 nA). Applications which benefit from the flat JFET

on-resistance include audio switching, video switching, and

data acquisition.

To achieve fast and accurate switch performance, each device

comprises four n-channel JFET transistors and a TTL

compatible bipolar driver. The driver is designed to achieve

break-before-make

switching

action,

eliminating

the

inadvertent shorting between channels and the crosstalk

which would result. In the on state, each switch conducts

current equally well in either direction. In the off condition, the

switches will block up to 20 V peak-to-peak, with feedthrough

of less than −60 dB at 10 MHz.

FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION

TRUTH TABLE

Logic

0

OFF

ON

1

ON

OFF

Logic “0” v 08 V

Logic “0” v 0.8 V

Logic “1” w 24 V

g

Logic “1” w 2.4 V