CD54HCT688F3A

Comparators Overview

The CD54HCT688F3A is an 8-bit identity/magnitude comparator with enable, manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and features a propagation delay time of 34 ns. The component is housed in a 20-pin Ceramic Dual In-Line Package (CDIP-20) and supports an operating temperature range from -55°C to 125°C. Designed for high-speed CMOS logic applications, it provides cascading capabilities and offers standard output fanout of 10 LSTTL loads or bus driver output fanout of 15 LSTTL loads.

Comparators Feature Summary

• Provides 8-bit identity and magnitude comparison functionality with an enable input
• Supports cascading for expanded bit-width comparisons
• Compatible with HCT logic standards for direct interface with TTL-driven systems

Comparators Applications

• Digital data comparison circuits
• Magnitude detection systems
• Industrial control logic interfaces

Comparators Procurement Notes

Verify the specific suffix F3A against official Texas Instruments documentation to confirm package type and temperature grade. Ensure compatibility with existing system voltage levels and thermal requirements before procurement. Cross-reference ordering information directly with authorized distributors to avoid counterfeit components.

Comparators Selection Notes

Select this component when an 8-bit comparator with enable functionality is required for military or industrial environments due to its extended temperature range. Consider the CDIP-20 package constraints for board layout. Verify that the 34 ns propagation delay meets system timing specifications and that the HCT input thresholds align with upstream logic outputs.

Comparators Part Context

This part belongs to the Texas Instruments CD54HC/CD54HCT series of high-speed CMOS logic devices. The '54' prefix indicates a military-grade temperature range capability, while 'HCT' denotes High-speed CMOS technology compatible with TTL inputs. The device serves as a fundamental building block for digital arithmetic and decision-making logic in complex integrated circuits.

Comparators Replacement Considerations

Direct substitutes include other variants within the CD54HCT688 family, such as CD54HCT688F or CD54HCT688J, provided they match the required package and temperature specifications. Verify pinout compatibility and electrical characteristics before substitution.