DG884AM VISHAY [Vishay Siliconix], DG884AM Datasheet

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DG884AM

Manufacturer Part Number
DG884AM
Description
8 x 4 Wideband Video Crosspoint Array
Manufacturer
VISHAY [Vishay Siliconix]
Datasheet

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Part Number
Manufacturer
Quantity
Price
Part Number:
DG884AM/883C
Manufacturer:
SC
Quantity:
500
DESCRIPTION
The DG884 contains a matrix of 32 T-switches configured in
an 8
used as an input or output. Any of the IN pins may be switched
to any or simultaneously to all OUT pins.
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.
Document Number: 70071
S-52433—Rev. G, 20-Dec-04
FEATURES
D Routes Any Input to Any Output
D Wide Bandwidth: 300 MHz
D Low Crosstalk: −85 dB @ 5 MHz
D Double Buffered TTL-Compatible
D Low r
D Optional Negative Supply
FUNCTIONAL BLOCK DIAGRAM
Latches with Readback
4 crosspoint array. Any of the IN/OUT pins may be
DS(on)
: 45 W
WR
CS
B
B
8 x 4 Wideband Video Crosspoint Array
1
0
I/O
A
I/O Control
3
Logic
A
BENEFITS
D Reduced Board Space
D Improved System Bandwidth
D Improved Channel Off-Isolation
D Simplified Logic Interfacing
D Allows Bipolar Signal Swings
D Reduced Insertion Loss
D High Reliability
2
A
1
IN
A
0
1
IN
Decode Logic, Switch Drivers
2
8 4 Switch Matrix
IN
3
IN
Current Event Latches
4
Next Event Latches
IN
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).
5
IN
6
IN
7
IN
8
APPLICATIONS
D Wideband Signal Routing and
D High-End Video Systems
D NTSC, PAL, SECAM Switchers
D Digital Video Routing
D ATE Systems
Multiplexing
OUT
OUT
OUT
OUT
4 Disable Outputs
RS
SALVO
1
2
3
4
Vishay Siliconix
DG884
www.vishay.com
1

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DG884AM Summary of contents

Page 1

Wideband Video Crosspoint Array FEATURES D Routes Any Input to Any Output D Wide Bandwidth: 300 MHz D Low Crosstalk: − MHz D Double Buffered TTL-Compatible Latches with Readback D Low ...

Page 2

... Current Event latches are being read 1 All crosspoints opened (but data in Next Event latches is preserved) ORDERING INFORMATION Package Part Number −40 to 85_C 44-Pin PLCC DG884DN −55 to 125_C 44-Pin CLCC DG884AM/883 Actions Document Number: 70071 S-52433—Rev. G, 20-Dec- ...

Page 3

Note: When Next Event latches are transparent. Each crosspoint is addressed individually, e.g., to connect IN requires ...

Page 4

DG884 Vishay Siliconix a SPECIFICATIONS Parameter Symbol Analog Switch e Analog Signal Range V ANALOG Drain-Source On-Resistance r DS(on) Resistance Match Dr DS(on) Between Channels Source Off Leakage Current I S(off) Drain Off Leakage Current I D(off) Total Switch On ...

Page 5

SPECIFICATIONS Parameter Symbol Power Supplies Positive Supply Current I+ Negative Supply Current I− Digital GND Supply Current I DG Logic Supply Current V− Functional Operating Supply Volt V− to GND e e age ...

Page 6

DG884 Vishay Siliconix TYPICAL CHARACTERISTICS (25_C UNLESS NOTED) Adjacent Input Crosstalk 120 100 − Frequency (MHz) All Hostile Crosstalk 100 − Frequency (MHz) www.vishay.com 6 ...

Page 7

TIMING DIAGRAMS CS for Device A Presetting Device A CS for Device Address Select Output 1 B − Address Input Select Input A − ...

Page 8

DG884 Vishay Siliconix TEST CIRCUITS − V− OUT GND DGND DG884 IN − SALVO I ...

Page 9

TEST CIRCUITS − V− OUT 1 GND DGND DG884 I/O CS SALVO FIGURE 6. ...

Page 10

DG884 Vishay Siliconix Pin Symbol 10, 12, 14, 16, GND 18, 20, 41 DGND V− 11, 13, 15, 17 ...

Page 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 I ...

Page 12

DG884 Vishay Siliconix APPLICATIONS + DG884 V− −3 V FIGURE 14. DG884 Power Supply ...

Page 13

APPLICATIONS A typical switching threshold versus V L These devices feature an address readback facility whereby the last address written to the device may be read by the system. This allows improved status monitoring and hand shaking without additional external ...

Page 14

Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc., or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description ...

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