74HCT688PW,112

Comparators Overview

The 74HCT688PW,112 is an 8-bit magnitude comparator from the NXP 74HCT series. It operates within a supply voltage range of 4.5 V to 5.5 V and features active-low outputs that indicate equality (A=B). The device is housed in a 20-TSSOP package and supports surface mount installation. It exhibits a maximum propagation delay of 34 ns at 4.5 V with 50 pF load. Operating temperatures range from -40 °C to +125 °C, with a maximum supply current of 8 µA.

Comparators Feature Summary

• Performs 8-bit magnitude comparison with active-low output signaling when input A equals input B
• Compatible with standard 5 V logic systems via HCT technology for direct interface with TTL circuits
• Designed for industrial temperature ranges ensuring reliable operation in harsh environments

Comparators Applications

• Digital data comparison circuits
• Address decoding systems
• Equality checking in microprocessor interfaces

Comparators Procurement Notes

Verify component status as obsolete or end-of-life through official NXP channels before procurement planning. Confirm package integrity and pinout compatibility with existing PCB layouts. Request original manufacturer documentation to ensure authenticity and traceability. Check for alternative sourcing options if immediate replacement is required due to discontinuation.

Comparators Selection Notes

Select this component for applications requiring precise 8-bit equality detection in 5 V logic environments. Ensure system voltage remains within the 4.5 V to 5.5 V specification. Consider thermal management for high-temperature operations up to 125 °C. Verify timing requirements against the 34 ns propagation delay limit for signal integrity.

Comparators Part Context

This part belongs to the Philips/NXP 74HCT logic family, designed for high-speed CMOS operation with TTL-compatible inputs. The 74HCT688 specifically addresses magnitude comparison needs. It shares functional similarities with other comparators but offers specific 8-bit resolution and active-low output characteristics tailored for digital identity verification tasks.

Comparators Replacement Considerations

Official substitutes include 74HCT688PW,118 and 74HCT688D,652. Verify pinout and electrical specifications match before substitution. Consult NXP documentation for cross-reference details.