AN501 Просмотр технического описания (PDF) - Vishay Semiconductors
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AN501 Datasheet PDF : 11 Pages
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AN501
Vishay Siliconix
The DG535/536 Wideband Multiplexers
Suit a Wide Variety of Applications
Introduction
Analog switch IC’s traditionally have found limited use in
applications involving high-frequency analog or digital signals.
Degradation of switch performance and intolerable signal
cross-talk between channels has undoubtedly forced many
designers to use bulky electromechanical switches or costly
discrete designs.
At best, analog switch ICs configured in L or T arrangement could
be adopted. However, increased board space and layout
complexity became major problems in configuring systems with
high channel density.
The DG535/536 are compact 16-channel, single-ended
multiplexer ICs, primarily designed as a cost-effective solution to
video and wideband switching problems. Other applications that
benefit from the devices’ superior performance characteristics
are:
S Digital switching
S Audio Switching
S PCM routing networks
S ATE systems
S High-channel-density multiplexing or demultiplexing systems
S High-speed multiplexing systems
S Low-level signal multiplexing
Product Description
A functional block diagram of the DG535/536 is shown in
Figure 1 and the switch configuration is shown in Figure 2. The
device is fabricated using self-isolated, silicon-gate D/CMOS
technology. This process enables the logic interface and driver
circuitry, the gating and latching stages, and the switching
elements to be combined in a monolithic structure.
Ease of design for large switching matrices and interface with
microprocessors is accomplished with comprehensive logic
gating and latching functions available on the chip.
V+
GND
S1
S8
D
S9
S16
Decoders/Drivers
DIS
Gating
Logic
Latches
EN CS CS
A3 A2 A1 A0 ST
FIGURE 1. DG535/536 Functional Block Diagram
Document Number: 70608
03-Aug-99
SW1
S1
SW3
S2
SW2
‘T’ Switch
S8
Configuration
S9
S15
S16
SW4
D
SW5
1st Level
2nd Level
FIGURE 2. Switch Configuration
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