DG641, DG642, DG643
Vishay Siliconix
Low On-Resistance Wideband/Video Switches
DESCRIPTION
FEATURES
The DG641, DG642, DG643 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 typ-DG642), low capacitance and high
current handling capability.
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Wide bandwidth: 500 MHz
Low crosstalk at 5 MHz: - 85 dB
Low RDS(on): 5 , DG642
TTL logic compatible
Fast switching: tON 50 ns
Single supply compatibility
• High current: 100 mA, DG642
BENEFITS
To achieve TTL compatibility, low channel capacitances and
fast switching times, the DG641, DG642, DG643 are built on
the Vishay Siliconix proprietary D/CMOS process. Each
switch conducts equally well in both directions when on, and
blocks up to 14 Vp-p when off. An epitaxial layer prevents
latchup.
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High precision
Improved frequency response
Low insertion loss
Improved system performance
Reduced board space
Low power consumption
APPLICATIONS
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RF and video switching
RGB switching
Video routing
Cellular communications
ATE
Radar/FLIR systems
Satellite receivers
Programmable filters
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
Dual-In-Line and SOIC
IN1
Dual-In-Line and SOIC
16 IN2
1
IN1
1
16
IN2
D1
2
15
D2
Dual-In-Line and SOIC
D1
2
15 D2
S1
3
14 S2
S1
1
8
IN
GND
3
14
GND
V-
4
13 V+
D1
2
7
V+
S1
4
13
S2
V-
3
6
D2
V-
5
12
V+
GND
4
5
S2
S4
6
11
S3
GND
7
10
GND
D4
8
9
D3
DG641
GND
5
12 GND
S4
6
11 S3
D4
7
10 D3
IN4
8
9
DG642
Top View
IN3
DG643
Top View
Top View
TRUTH TABLE (DG641)
Logic
0
1
Switch
OFF
ON
Logic “0” 0.8 V
Logic “1” 2.4 V
Document Number: 70058
S11-0154-Rev. F, 31-Jan-11
TRUTH TABLE (DG642)
Logic
0
1
Logic “0” 0.8 V
Logic “1” 2.4 V
SW1
OFF
ON
SW2
ON
OFF
TRUTH TABLE (DG643)
Logic
0
1
SW1, SW2
OFF
ON
SW3, SW4
ON
OFF
Logic “0” 0.8 V
Logic “1”2.4 V
www.vishay.com
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