HI3-0509A-5

Analog Switches, Multiplexers, Demultiplexers Overview

The HI3-0509A-5 is a differential 4-channel CMOS analog multiplexer manufactured by Harris Corporation. It features active overvoltage protection allowing analog inputs to withstand constant 70VP-P levels with ±15V supplies without damaging the device or disturbing other channels. The component utilizes 44V dielectrically isolated CMOS technology and provides fail-safe operation during power loss, presenting 1kΩ resistance to protect signal sources from short-circuiting. Digital inputs sustain continuous faults up to 4V greater than either supply rail.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Active overvoltage protection maintains signal fidelity under fault conditions that would destroy standard multiplexers
• No channel interaction occurs during overvoltage events on any single input
• Fail-safe design prevents latch-up and protects signal sources during multiplexer supply loss

Analog Switches, Multiplexers, Demultiplexers Applications

• Systems where analog inputs originate from external equipment
• Circuits involving separately powered circuitry
• Applications requiring protection against high voltage transients

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify manufacturer documentation for the HI3-0509A-5 as Harris Corporation semiconductor assets were acquired by Intersil. Confirm package type and pinout compatibility with existing designs. Check for RoHS compliance status and availability of current production runs versus obsolete stock.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when differential signal routing requires robust overvoltage tolerance exceeding standard supply rails. Ensure the design accommodates the specific 4-channel differential architecture. Verify that the 44V dielectric isolation meets the system's maximum voltage stress requirements.

Analog Switches, Multiplexers, Demultiplexers Part Context

This part belongs to the HI-506A through HI-509A family of analog multiplexers featuring active overvoltage protection. The HI-509A variant specifically handles four differential channels, distinguishing it from the single-ended configurations of the HI-506A and HI-508A models within the same protected series.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided data. Verify cross-reference lists from distributor databases for equivalent protected multiplexers if direct replacement is required.