358 8-Channel Fault-Protected Analog Multiplexer

DDC’s 358 8-Channel single-ended (1 of 8) multiplexers with fault protection features a greater than 50 krad (Si) total dose tolerance, depending upon space mission.

Using a series N-channel, P-channel, N-channel structure, these multiplexers provide significantly improved fault protection.

If the power supplies to the fault-protected multiplexer are inadvertently turned off while input voltages are still applied, all channels in the multiplexer are turned off, and only a few nanoamperes of leakage current will flow into the inputs.

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.

All digital inputs have logic thresholds of 0.8V and 2.4V, ensuring both TTL and CMOS compatibility without requiring pullup resistors.

Break-before-make operation is guaranteed. Power supply currents have been reduced and typical power dissipation is less than 2 mW.