DG458 Datasheet, PDF (1/8 Pages) Vishay Siliconix – Fault-Protected Single 8-Ch/Differential 4-Ch Analog Multiplexers

DG458/459
Vishay Siliconix
Fault-Protected Single 8-Ch/Differential 4-Ch Analog Multiplexers
FEATURES
D Fault and Overvoltage Protection
D All Channels Off When Power Off
D Latchup-Proof
D Fast Switching—T_A: 200 ns
D Break-Before-Make Switching
D Low On-Resistance: 180 W
D Low Power Consumption: 3 mW
D TTL and CMOS Compatible Inputs
BENEFITS
D Improved Ruggedness
D Power Loss Protection
D Prevents Adjacent Channel Crosstalk
D Standard Logic Interface
D Superior Accuracy
D Fast Settling Time
APPLICATIONS
D Data Acquisition Systems
D Industrial Process Control Systems
D Avionics Test Equipment
D High-Rel Control Systems
D Telemetry
DESCRIPTION
The DG458 and DG459 are 8-channel single-ended and
4-channel differential analog multiplexers, respectively,
incorporating fault protection. A series n-p-n MOSFET
structure provides device and signal-source protection in the
event of power loss or overvoltages. Under fault conditions the
multiplexer input (or output) appears as an open circuit and
only a few nanoamperes of leakage current will flow. This
protects not only the multiplexer and the circuitry following it,
but also protects the sensors or signal sources which drive the
multiplexer.
The DG458 and DG459 can withstand continuous overvoltage
inputs up to "35 V. All digital inputs have TTL compatible logic
thresholds. Break-before-make operation prevents channel-
to-channel interference.
The DG458 and DG459 are improved pin-compatible
replacements for HI-508A/509A and MAX358/359
multiplexers.
FUNCTIONAL BLOCK DIAGRAM AND PIN CONFIGURATION
DG458
Dual-In-Line
A₀
1
16 ^A1
EN _{2 Decoders/Drivers 15} A₂
V–
3
GND
14
S₁
4
S₂
5
V+
13
12 ^S5
S₃
6
11 ^S6
S_{4 7}
10 ^S7
D8
9
S₈
Top View
Document Number: 70064
S-52433—Rev. F, 06-Sep-99
DG459
Dual-In-Line
A₀
1
16 ^A1
EN _{2 Decoders/Drivers 15} GND
V–
3
V+
14
S_1a
4
S_2a
5
13
S_1b
12
S_2b
S_3a
6
11
S_3b
S_4a
7
10
S_4b
D_{a 8}
9
D_b
Top View
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