参数资料
型号: DG884AM883
厂商: Vishay Intertechnology,Inc.
英文描述: 8 x 4 Wideband Video Crosspoint Array
中文描述: 8 × 4交叉点阵列宽带视频
文件页数: 11/14页
文件大小: 166K
代理商: DG884AM883
DG884
Vishay Siliconix
Document Number: 70071
S-52433—Rev. G, 20-Dec-04
www.vishay.com
11
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 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.
/
Mux 3 Decoder
4
/
4
Q
0
Q
3
N
L
/
7
C
L
Data
Buffers
EN
/4
C
/
9
8
8 Analog Inputs
Mux 1
OUT
1
8 T-Switches
1 Series Switch
8
Mux 2
OUT
2
8
OUT
3
Mux 4
OUT
4
EN
DIS
Open Drain
Output
A
0
A
1
A
2
A
3
CS
WR
SALVO
I/O
B
0
B
1
RS
One of Four Blocks of Logic/Latches Shown
FIGURE 12.
Control Circuitry
Decoders/
Drivers
APPLICATIONS
WR
SALVO
IN
1
IN
2
IN
8
DG884
B
0
B
1
A
0
A
1
A
2
A
3
RESET
RS
DIS
1
OUT
1
Two—Si584
Quad Unity-Gain Buffers
CLC410
75
75
FIGURE 13.
Fully Buffered 8 X 4 Crosspoint
Note: DIS outputs are used to
power down the Si582 amplifiers.
x2
DIS
2
OUT
2
x2
DIS
3
OUT
3
x2
DIS
4
OUT
4
x2
x1
x1
x1
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