dg884 Vishay, dg884 Datasheet - Page 11

• Manufacturer Part Number: dg884
• Description: 8 X 4 Wideband Video Crosspoint Array
• Manufacturer: Vishay

DEVICE DESCRIPTION
Readback
The I/O facility enables the user to write data to the Next
Event latches or to read the contents of the Current Event
latches. This feature permits the central controller to
periodically monitor the state of the matrix. If a power loss to
APPLICATIONS
Document Number: 70071
S-71241–Rev. H, 25-Jun-07
SALVO
WR
I/O
A
RS
A
A
A
B
B
CS
1
2
3
0
0
1
IN
IN
IN
1
2
8
Quad Unity-Gain Buffers
75
Ω
Two-Si584
Mux 3 Decoder
x1
x1
x1
RESET
EN
RS
Q
0
Figure 13. Fully Buffered 8 x 4 Crosspoint
Q
3
WR
One of Four Blocks of Logic/Latches Shown
B
DG884
0
4
/
Figure 12. Control Circuitry
B
4
/
1
SALVO
A
Buffers
0
Data
EN
A
1
A
2
the controller occurs, the readback feature helps the matrix
to recover rapidly. It also offers a means to perform PC board
diagnostics both in production and in system operation.
A
Open Drain
DIS
DIS
DIS
DIS
3
Output
DIS
1
2
3
4
4
3
7
/
Decoders/
Drivers
CLC410
x2
x2
x2
x2
Note: DIS outputs are used to
power down the Si582 amplifiers.
75
Ω
9
/
OUT
OUT
OUT
OUT
8 Analog Inputs
1 Series Switch
8 T-Switches
1
2
3
4
Vishay Siliconix
Mux 1
Mux 2
Mux 4
8
8
8
www.vishay.com
DG884
OUT
OUT
OUT
OUT
1
2
3
4
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