DG641/642/643

Vishay Siliconix

Document Number: 70058

S-52433—Rev. E, 06-Sep-99

www.vishay.com

S FaxBack 408-970-5600

4-1

Low On-Resistance Wideband/Video Switches

FEATURES

BENEFITS

APPLICATIONS

D Wide Bandwidth: 500 MHz

D Low Crosstalk at 5 MHz: –85 dB

D TTL Logic Compatible

D Single Supply Compatibility

D High Current: 100 mA, DG642

D High Precision

D Improved Frequency Response

D Low Insertion Loss

D Improved System Performance

D Reduced Board Space

D Low Power Consumption

D RF and Video Switching

D RGB Switching

D Video Routing

D Cellular Communications

D ATE

D Radar/FLIR Systems

D Satellite Receivers

D Programmable Filters

DESCRIPTION

The DG641/642/643 are high performance monolithic video

switches designed for switching wide bandwidth analog and

digital signals. DG641 is a quad SPST, DG642 is a single

SPDT, and DG643 is a dual SPDT function. These devices

have exceptionally low on-resistances (5

W typ—DG642), low

capacitance and high current handling capability.

To achieve TTL compatibility, low channel capacitances and

fast switching times, the DG641/642/643 are built on the

Vishay Siliconix proprietary D/CMOS process. Each switch

conducts equally well in both directions when on, and blocks

FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION

TRUTH TABLEDG642

OFF

ON

DG641

V–

V+

GND

GND

Dual-In-Line and SOIC

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

Top View

TRUTH TABLEDG641

Logic “0”

v 0.8 V

Logic “1”

w 2.4 V

Logic

Switch

0

1

OFF

ON

Logic “0”

v 0.8 V

Logic “1”

w 2.4 V

Logic

0

1

ON

OFF

Logic “0”

v 0.8 V

Logic “1”

w 2.4 V

Logic

0

1

DG642

GND

Dual-In-Line and SOIC

IN

V+

V–

1

2

3

4

8

7

6

5

Top View

1

2

3

4

5

6

7

8

16

15

14

13

12

11

10

9

Top View

GND

GND

V–

V+

GND

GND

Dual-In-Line and SOIC

DG643

OFF

ON

ON

OFF

TRUTH TABLEDG643