ZJG4438/9

  ZJG4438/9 36 V, 4-/8-Channel, Fault-Protected Analog Multiplexers.pdf

| Features

| Applications

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Analog Input/Output Module	ATE	Communication Systems
Relay Replacement	Instruments	Industrial and Process Control Systems

| General Description

The ZJG4438 and ZJG4439 are analog multiplexers, with the ZJG4438 comprising eight single channels and the ZJG4439 comprising four differential channels. These multiplexers provide fault protection. Using optimized design, both device and signal source protection is provided in the event of an overvoltage or power loss. The multiplexer can withstand continuous overvoltage inputs from -50 V to +50 V. During fault conditions with power supplies off, the multiplexer input (or output) appears as an open circuit and only 2 nA of leakage current flows. This protects not only the multiplexer and the circuitry driven by the multiplexer, but also protects the sensors or signal sources which drive the multiplexer.

The ZJG4438 switches one of eight inputs to a common output as determined by the 3-bit binary address lines, A0, A1, and A2. The ZJG4439 switches one of four differential inputs to a common differential output as determined by the 2-bit binary address lines, A0 and A1. An EN input on each device is used to enable or disable the device. When disabled, all channels are switched off.

ZJG4438/ZJG4439 are available in SOIC-16 and TSSOP-16 packages and are pin compatible with industry standards.

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