CD74HC688PWT

Comparators Overview

The CD74HC688PWT is an 8-bit identity comparator manufactured by Texas Instruments, housed in a 20-pin TSSOP package. It performs comparisons of two 8-bit binary or BCD words to determine equality (A = B). The device features active-low outputs and includes an output-enable input to control data flow. Designed for high-speed CMOS logic applications, it operates within a supply voltage range of 2 V to 6 V. The component supports surface-mount installation and functions across an industrial temperature range from -40°C to +85°C.

Comparators Feature Summary

• Performs identity comparison of two 8-bit binary or BCD words
• Features active-low outputs for direct interfacing
• Includes an output-enable input for controlled data access

Comparators Applications

• Digital systems requiring equality verification of 8-bit data words
• BCD code validation circuits
• High-speed logic control interfaces

Comparators Procurement Notes

Verify the specific suffix 'PWT' corresponds to the 20-TSSOP package and tape-and-reel packaging configuration. Confirm RoHS compliance status and lead times directly with authorized distributors or Texas Instruments. Ensure the operating environment remains within the specified -40°C to +85°C temperature range during deployment.

Comparators Selection Notes

Select this component when an 8-bit identity comparator with high-speed CMOS performance is required in a compact surface-mount package. It is suitable for designs needing active-low outputs and an enable pin for bus management. Consider the 2V to 6V supply range compatibility with existing system voltages before integration.

Comparators Part Context

This part belongs to the Texas Instruments SN74HC/CD74HC series of high-speed CMOS logic devices. The HC series offers wide operating voltage ranges and improved switching speeds compared to older LS technologies. The CD variant typically denotes commercial grade temperature specifications, aligning with the -40°C to +85°C operational window defined for this model.

Comparators Replacement Considerations

SN74HC688PWRE4: Similar HC technology but may differ in reel packaging specifics. SN74HC688DWRE4: SOIC-20 package alternative requiring footprint modification. Verify pinout compatibility and electrical characteristics before substitution.