PLCC

14

15

16

17

18

8

7

6

5

4

1

2

319

20

11

10

913

12

Top View

GND

V–

GND

V+

GND

GND

V–

GND

Dual-In-Line

GND

GND

GND

GND

V+

GND

1

2

3

4

5

6

7

8

20

19

18

17

16

15

14

13

Top View

912

10

11

DG540

DG540

DG540/541/542

Vishay Siliconix

Document Number: 70055

S-00399—Rev. G, 13-Sep-99

www.vishay.com

S FaxBack 408-970-5600

4-1

Wideband/Video “T” Switches

FEATURES

BENEFITS

APPLICATIONS

D Wide Bandwidth: 500 MHz

D Low Crosstalk: –85 dB

D High Off-Isolation: –80 dB @ 5 MHz

D “T” Switch Configuration

D TTL and CMOS Logic Compatible

D Flat Frequency Response

D High Color Fidelity

D Low Insertion Loss

D Improved System Performance

D Reduced Board Space

D Reduced Power Consumption

D Improved Data Throughput

D RF and Video Switching

D RGB Switching

D Local and Wide Area Networks

D Video Routing

D Fast Data Acquisition

D ATE

D Radar/FLR Systems

D Video Multiplexing

DESCRIPTION

The DG540/541/542 are high performance monolithic

wideband/video switches designed for switching RF, video

and digital signals. By utilizing a “T” switch configuration on

each channel, these devices achieve exceptionally low

crosstalk and high off-isolation. The crosstalk and off-isolation

of the DG540 are further improved by the introduction of extra

GND pins between signal pins.

To achieve TTL compatibility, low channel capacitances and

fast switching times, the DG540 family is built on the

Vishay Siliconix proprietary D/CMOS process. Each switch

conducts equally well in both directions when on.

FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION

TRUTH TABLE

Logic

Switch

0

OFF

1

ON

Logic “0”

v 0.8 V

Logic “1”

w 2 V

Logic 1

w 2 V