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DG884AM/883 Datasheet

  • DG884AM/883

  • 8 x 4 Wideband Video Crosspoint Array

  • 151.53KB

  • 14頁

  • VISHAY   VISHAY

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DG884
Vishay Siliconix
8 x 4 Wideband Video Crosspoint Array
FEATURES
Routes Any Input to Any Output
Wide Bandwidth: 300 MHz
Low Crosstalk: 鈥?5 dB @ 5 MHz
Double Buffered TTL-Compatible
Latches with Readback
D
Low r
DS(on)
: 45
W
D
Optional Negative Supply
D
D
D
D
BENEFITS
D
D
D
D
D
D
D
Reduced Board Space
Improved System Bandwidth
Improved Channel Off-Isolation
Simplified Logic Interfacing
Allows Bipolar Signal Swings
Reduced Insertion Loss
High Reliability
APPLICATIONS
D
Wideband Signal Routing and
Multiplexing
D
High-End Video Systems
D
NTSC, PAL, SECAM Switchers
D
Digital Video Routing
D
ATE Systems
DESCRIPTION
The DG884 contains a matrix of 32 T-switches configured in an
8 4 crosspoint array. Any of the IN/OUT pins may be used
as an input or output. Any of the IN pins may be switched to
any or simultaneously to all OUT pins.
Control data is loaded individually into four Next Event latches.
When all Next Event latches have been programmed, data is
transferred into the Current Event latches via a SALVO
command. Current Event latch data readback is available to
poll array status.
Output disable capabilities make it possible to parallel multiple
DG884s to form larger switch arrays. DIS outputs provide
control signals used to place external buffers in a power saving
mode.
For additional information see applications note AN504
(FaxBack document number 70610).
The DG884 is built on a proprietary D/CMOS process that
combines low capacitance switching DMOS FETs with low
power CMOS control logic and drivers. The ground lines
between adjacent signal input pins help to reduce crosstalk.
The low on-resistance and low on-capacitance of the DG884
make it ideal for video and wideband signal routing.
FUNCTIONAL BLOCK DIAGRAM
IN
1
IN
2
IN
3
IN
4
IN
5
IN
6
IN
7
IN
8
OUT
1
OUT
2
OUT
3
OUT
4
8 4 Switch Matrix
Decode Logic, Switch Drivers
4 Disable Outputs
WR
CS
B
1
B
0
I/O Control
Logic
Current Event Latches
RS
SALVO
Next Event Latches
I/O A
3
Document Number: 70071
S-52433鈥擱ev. F, 06-Sep-99
A
2
A
1
A
0
www.vishay.com
S
FaxBack 408-970-5600
5-1

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