MAX379CWG+

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX379CWG+ is a high-voltage, fault-protected analog multiplexer manufactured by Analog Devices Inc./Maxim Integrated. It features two differential channels (4:1 configuration) housed in a 24-pin Wide SO package. The device operates from ±4.5V to ±18V supplies with power dissipation under 2mW. It provides significant fault protection using a series N-channel/P-channel/N-channel structure, allowing continuous ±60V input with power on and ±75V with power off. Key electrical parameters include an ON resistance of 2.0kΩ to 3.5kΩ, access time of 0.5µs to 1.0µs, and break-before-make delay of 25ns to 200ns.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Series FET switching architecture ensures all switches turn off when power supplies are removed, limiting leakage to nanoamperes.
• Continuous operation withstands ±60V input overvoltage while powered, protecting connected sensors and downstream circuitry.
• Guaranteed break-before-make switching action prevents simultaneous connection of multiple inputs to the output.
• Digital inputs maintain TTL and CMOS compatibility without requiring external pull-up resistors.

Analog Switches, Multiplexers, Demultiplexers Applications

• Data Acquisition Systems
• Industrial and Process Control Systems
• Avionics Test Equipment
• Signal Routing Between Systems

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm the specific suffix 'WG' corresponds to the 24-Wide SOIC package and the 'C' grade indicates the commercial temperature range. Ensure the '+'' designation confirms lead-free compliance. Request the original datasheet for final technical validation before integration into production designs.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component for applications requiring robust fault protection against high-voltage transients. The differential channel configuration suits balanced signal routing needs. Verify that the required supply voltage falls within the ±4.5V to ±18V operational range. Consider the thermal performance if operating near the upper limits of the specified temperature range.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the MAX378/MAX379 family of high-voltage, fault-protected analog multiplexers. The MAX379 specifically offers two differential channels, whereas the MAX378 provides eight single-ended channels. Both share identical fault-protection mechanisms and digital interface characteristics, differing primarily in channel count and configuration.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Public confirmed substitute part numbers: MAX378CWG+. Verify pinout compatibility and channel configuration differences between single-ended and differential variants before substitution.

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the MAX379 protect against overvoltage when power is off?

When power supplies are off, the series FET structure turns all channels off, limiting input current to sub-microamp levels and withstanding up to ±75V continuous input voltage.

What is the maximum input voltage the device can handle with power applied?

The device can withstand a continuous ±60V input voltage when the power supplies are active.

Does the device require pull-up resistors for digital inputs?

No, the digital inputs have logic thresholds of 0.8V and 2.4V, ensuring TTL and CMOS compatibility without requiring pull-up resistors.