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MAX379 Datasheet (max378 / Max379) Fault-protected Analog Multiplexers

Manufacturer: Maxim Integrated (now Analog Devices)

Overview: 19-1902; Rev 1; 8/94 High-Voltage, Fault-Protected Analog Multiplexers _______________General.

General Description

The MAX378 8-channel single-ended (1-of-8) multiplexer and the MAX379 4-channel differential (2-of-8) multiplexer use a series N-channel/P-channel/N-channel structure to provide significant fault protection.

If the power supplies to the MAX378/MAX379 are inadvertently turned off while input voltages are still applied, all channels in the muxes are turned off, and only a few nanoamperes of leakage current will flow into the inputs.

This protects not only the MAX378/MAX379 and the circuitry they drive, but also the sensors or signal sources that drive the muxes.

Key Features

  • o o o o o o o o o o Fault Input Voltage ±75V with Power Supplies Off Fault Input Voltage ±60V with ±15V Power Supplies All Switches Off with Power Supplies Off On Channel Turns OFF if Overvoltage Occurs on Input or Output Only Nanoamperes of Input Current Under All Fault Conditions No Increase in Supply Currents Due to Fault Conditions Latchup-Proof Construction Operates from ±4.5V to ±18V Supplies All Digital Inputs are TTL and CMOS Compatible Low-Power Monolithic CMOS Design MAX378/MAX379 ww.

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