CD74HC688NSR

Comparators Overview

The CD74HC688NSR is an 8-bit identity comparator from Texas Instruments' HC logic family, housed in a 20-pin SOIC package. It compares two 8-bit binary or BCD words, asserting an active-low output when inputs are equal (A=B). Operating on a 2V to 6V supply with a maximum quiescent current of 80µA, it features propagation delays of 26ns at 6V and 45ns at 2V. The device supports SMD/SMT mounting and functions within a -40°C to +85°C temperature range.

Comparators Feature Summary

• Performs magnitude comparison of two 8-bit binary or BCD words
• Provides active-low output signal indicating input equality
• Supports cascading for multi-word comparison applications

Comparators Applications

• Digital data validation circuits
• Address decoding systems
• Control logic verification

Comparators Procurement Notes

Verify the specific suffix 'NSR' confirms the SOIC-20 package and reel packaging format. Ensure the component meets RoHS standards as indicated by manufacturer specifications. Confirm that the operating voltage range aligns with system requirements before integration. Cross-reference the datasheet revision date to ensure compatibility with design constraints.

Comparators Selection Notes

Select this component for high-speed CMOS applications requiring 8-bit identity comparison. The HC series offers standard fanout capabilities compatible with LSTTL loads. Consider the SOIC-20 package for surface-mount assembly needs. Verify that the propagation delay characteristics meet timing requirements for the target digital interface speed.

Comparators Part Context

This part belongs to the CDx4HC688 high-speed CMOS logic family. It serves as a specialized integrated circuit for digital logic operations. The device complements other Texas Instruments logic components by providing dedicated comparison functionality without requiring multiple discrete gates.

Comparators Replacement Considerations

The SN74HC688DWRE4 is a confirmed substitute offering identical logical function and pinout compatibility. Both parts belong to the same HC logic family and provide equivalent 8-bit identity comparison capabilities.