MAX379EWG+

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX379EWG+ is a high-voltage, fault-protected analog multiplexer manufactured by Analog Devices Inc./Maxim Integrated. It features four differential channels (2-of-8 configuration) and utilizes a series N-channel/P-channel/N-channel structure for significant fault protection. The device operates from ±4.5V to ±18V supplies with a recommended voltage of ±15V. It supports an operating temperature range of -40°C to +85°C and is housed in a 24-pin Wide SO package. Key electrical parameters include an on-resistance of 2.0kΩ to 3.5kΩ, input leakage current of -1µA to 1µA under normal conditions, and access time of 0.5ns to 1.0ns.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Fault protection allows continuous ±60V input with power supplies active and withstands up to ±75V when supplies are off.
• All switches turn off automatically when power supplies are removed, limiting input currents to nanoamperes.
• Break-before-make operation prevents simultaneous connection of multiple inputs to the output.
• Digital inputs are compatible with both TTL and CMOS logic levels without requiring 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 specific suffix EWG corresponds to the 24-pin Wide SO package and the E grade (-40°C to +85°C) temperature rating. Confirm that the component meets RoHS3 compliance standards as indicated for this product line. Ensure the ordering information matches the required channel count and pinout for the intended circuit design.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select the MAX379EWG+ when differential signal routing is required within a fault-protected environment. This part is suitable for applications needing isolation between sensors and downstream electronics during power failures. Consider the ±15V supply requirement and the specific package dimensions for PCB layout constraints compared to single-ended alternatives like the MAX378.

Analog Switches, Multiplexers, Demultiplexers Part Context

The MAX379 is part of the MAX378/MAX379 family of high-voltage, fault-protected analog multiplexers. While the MAX378 provides eight single-ended channels, the MAX379 offers four differential channels (two 2-of-8 muxes). Both share the same fault-protection architecture and digital interface characteristics, differing primarily in channel configuration and pin assignments.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Public confirmed substitute part numbers: MAX379EPE, MAX379CWG, MAX379CJE, MAX379MJE, MAX379MLP.

Analog Switches, Multiplexers, Demultiplexers FAQ

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

When power supplies are off, all channels turn off, and the series FET structure limits input current to sub-microamp leakage values, protecting connected sensors from damage.

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

The MAX379 can withstand a continuous ±60V input when the V+ and V- power supplies are present.

Is the MAX379 compatible with standard TTL logic levels?

Yes, all digital inputs have logic thresholds of 0.8V and 2.4V, ensuring compatibility with both TTL and CMOS logic without requiring external pull-up resistors.