CD54HCT688F

Comparators Overview

The CD54HCT688F is an 8-bit magnitude comparator manufactured by Harris Corporation, belonging to the HCT logic series. It features inverted outputs and operates within a supply voltage range of 4.5V to 5.5V. The device is designed for industrial temperature applications, supporting a wide operating range from -55°C to 125°C. It utilizes CMOS technology and is housed in a 20-CDIP ceramic package with frit sealing, suitable for through-hole mounting.

Comparators Feature Summary

• Performs 8-bit magnitude comparison with inverted active-low outputs
• Utilizes HCT CMOS technology for compatibility with standard logic levels
• Constructed in a hermetically sealed ceramic DIP package for durability

Comparators Applications

• Industrial control systems requiring robust component packaging
• Data acquisition systems performing digital value comparisons
• Military or aerospace electronics demanding extended temperature stability

Comparators Procurement Notes

Verify RoHS compliance status as sources indicate non-compliance. Confirm the specific suffix 'F' denotes the 20-CDIP ceramic package variant. Check for availability of equivalent parts if lead times are critical, as this is a legacy component from Harris Corporation. Ensure the application environment supports the specified industrial temperature range.

Comparators Selection Notes

Select this component when a hermetically sealed, high-reliability magnitude comparator is required for harsh environments. The HCT series ensures compatibility with standard TTL/CMOS interfaces. Consider the 20-CDIP package constraints for PCB layout and mounting requirements compared to surface-mount alternatives.

Comparators Part Context

This part belongs to the Harris Corporation CD54/HCT series of high-speed CMOS logic devices. The family includes various comparators and transceivers designed for military and industrial applications. The CD54 prefix typically indicates space-grade or high-reliability variants with ceramic packaging, distinguishing them from commercial plastic-packaged counterparts.

Comparators Replacement Considerations

The CD54HC688F is a related HC-series variant with similar functionality but potentially different electrical characteristics. Verify pinout compatibility and output drive strength before substitution. No direct modern equivalents are explicitly confirmed in public documentation.