DG428/429
Vishay Siliconix
Single 8-Ch/Differential 4-Ch Latchable Analog Multiplexers
FEATURES
BENEFITS
APPLICATIONS
D Low rDS(on): 55 W
D Low Charge Injection: 1 pC
D Improved System Accuracy
D Microprocessor Bus Compatible
D Easily Interfaced
D Data Acquisition Systems
D Automatic Test Equipment
D Avionics and Military Systems
D Communication Systems
D On-Board TTL Compatible
Address Latches
D Reduced Crosstalk
D High Throughput
D High Speed—tTRANS: 160 ns
D Break-Before-Make
D Microprocessor-Controlled
Analog Systems
D Improved Reliability
D Low Power Consumption: 0.3 mW
D Medical Instrumentation
DESCRIPTION
The DG428/DG429 analog multiplexers have on-chip address
and control latches to simplify design in microprocessor based
applications. Break-before-make switching action protects
against momentary crosstalk of adjacent input signals.
several devices. All control inputs, address (Ax) and enable
(EN) are TTL compatible over the full specified operating
temperature range.
The silicon-gate CMOS process enables operation over a
wide range of supply voltages. The absolute maximumvoltage
rating is extended to 44 V. Additionally, single supply operation
is also allowed and an epitaxial layer prevents latchup.
The DG428 selects one of eight single-ended inputs to a
common output, while the DG429 selects one of four
differential inputs to a common differential output.
An on channel conducts current equally well in both directions.
In the off state each channel blocks voltages up to the power
supply rails. An enable (EN) function allows the user to reset
the multiplexer/demultiplexer to all switches off for stacking
On-board TTL-compatible address latches simplify the digital
interface design and reduce board space in bus-controlled
systems such as data acquisition systems, process controls,
avionics, and ATE.
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
DG428
DG428
Dual-In-Line
PLCC
WR
RS
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
3
2
1
20 19
A
0
A
1
Latches
EN
V–
A
2
EN
V–
4
5
6
7
8
18
A
2
Latches
17 GND
Decoders/Drivers
Decoders/Drivers
GND
V+
V+
S
1
S
2
S
3
16
15
14
S
1
S
5
S
2
S
5
S
6
S
3
S
6
9
10 11 12 13
Top View
S
4
S
7
D
S
8
Top View
Document Number: 70063
S-52433—Rev. J, 06-Sep-99
www.vishay.com S FaxBack 408-970-5600
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