MAX378CWG+T

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX378CWG+T is a high-voltage, fault-protected analog multiplexer manufactured by Analog Devices Inc./Maxim Integrated. It features an 8-channel single-ended (1-of-8) configuration housed in a 24-pin Wide SO package. The device operates from dual power supplies ranging from ±4.5V to ±18V and supports continuous input voltages up to ±60V with supplies active, or ±75V when supplies are 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. Digital inputs are compatible with TTL and CMOS logic levels.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Series N-channel/P-channel/N-channel structure provides significant fault protection against overvoltage conditions.
• All switches automatically turn off when power supplies are removed, limiting leakage current to nanoamperes.
• Break-before-make operation prevents simultaneous connection of multiple channels to the output.

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 'CWG' corresponds to the 24-pin Wide SOIC package and commercial temperature range (0°C to +70°C). Confirm RoHS compliance status for the '+T' designation if reel packaging is required. Cross-reference the manufacturer's discontinuance notices as availability may be restricted.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component for applications requiring robust fault protection against high-voltage transients without external circuitry. Ensure the system voltage does not exceed the ±18V supply limit. Verify that the ±60V continuous input rating aligns with the maximum expected signal levels during normal operation.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the MAX378/MAX379 family of high-voltage, fault-protected analog multiplexers. The MAX378 variant specifically handles single-ended signals, whereas the MAX379 supports differential pairs. Both utilize identical protection architectures but differ in channel configuration.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

MAX378CWG

Analog Switches, Multiplexers, Demultiplexers FAQ

How does the MAX378 handle overvoltage when power is off?

When power supplies are off, all channels turn off, allowing the device to withstand continuous input voltages up to ±75V while drawing only nanoampere-level leakage currents.

What is the digital input compatibility of the MAX378?

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