DG508ACY

Overview

The DG508ACY is a single-ended analog multiplexer manufactured by Harris Corporation, belonging to the CMOS monolithic family. It features one function with eight selectable channels housed in a ceramic dual in-line package (CDIP) with 16 terminals. The device operates on a nominal negative supply voltage of -15 V and supports an extended industrial temperature range from -55 °C to +125 °C. Key electrical specifications include a maximum on-state resistance of 400 Ω, an on-state resistance matching specification of 16.2 Ω, and a typical off-state isolation of 68 dB. The component utilizes glass-sealed ceramic construction for durability.

Feature Summary

• Monolithic CMOS construction providing high channel density within a compact footprint
• Bidirectional signal conduction capability in the ON state across all active channels
• High-voltage blocking performance in the OFF state, capable of isolating up to supply rails
• Ceramic DIP packaging designed for harsh environment reliability and thermal stability

Applications

• Data acquisition systems requiring multi-channel signal routing
• Precision instrumentation involving analog signal switching
• Demultiplexing applications in electronic test equipment

Procurement Notes

Verify the specific suffix 'CY' against official Harris or successor manufacturer documentation to confirm exact binning, testing levels, or environmental qualifications. Ensure compliance with RoHS directives if required, as legacy ceramic packages may not meet modern restriction standards. Confirm lead-free status and traceability requirements before procurement.

Selection Notes

Select this component when high isolation and bidirectional switching are required in a ruggedized form factor. The wide operating temperature range makes it suitable for aerospace or industrial environments where standard plastic packages may fail. Verify that the 400 Ω maximum on-resistance meets the system's voltage drop constraints.

Part Context

The DG508A series includes variants such as the DG506A, DG507A, and DG509A, offering different channel configurations like 16-channel or dual 4-channel setups. These devices share common CMOS architecture and control logic but differ in pin counts and channel organization. The DG508ACY specifically denotes the 8-channel variant in a military-grade or high-reliability ceramic package.

Replacement Considerations

Direct replacements include the DG508AAK and DG508ACJ from Intersil or Maxim Integrated. Verify pin compatibility and package dimensions when substituting. Cross-reference datasheets to ensure equivalent on-resistance and isolation characteristics.