74HCT688P-E

Comparators Overview

The Renesas Electronics Corporation 74HCT688P-E is an 8-bit magnitude comparator belonging to the 74HCT series. It operates with a supply voltage range of 4.5V to 5.5V and features active-low outputs for the A=B identity comparison function. The device provides output currents of 4mA for both high and low states, with a maximum propagation delay of 34ns at 4.5V and 50pF load. It functions within a temperature range of -40°C to 125°C and draws a quiescent current of 8µA.

Comparators Feature Summary

• Performs 8-bit magnitude comparison with active-low output indicating equality between inputs A and B
• Compatible with standard 5V CMOS logic families through HCT input levels
• Designed for industrial operating temperatures ranging from -40°C to 125°C

Comparators Applications

• Digital data validation circuits
• Address decoding systems
• Identity verification in digital logic designs

Comparators Procurement Notes

Verify the manufacturer part number 74HCT688P-E against official Renesas documentation to ensure authenticity. Confirm that the package type matches the required DIP-16 configuration. Check for specific ordering suffixes if tape-and-reel packaging is needed instead of bulk. Ensure the supply voltage requirements align with the 4.5V to 5.5V specification before integration.

Comparators Selection Notes

Select this component when an 8-bit identity comparator is required within the 74HCT logic family. It is suitable for applications needing active-low outputs and standard 5V operation. Consider the 34ns propagation delay and 4mA drive capability for timing and load constraints. Verify compatibility with existing system voltages and temperature ranges.

Comparators Part Context

This part belongs to the HD74HCT series, a standard family of 5V drive bipolar general-purpose logic ICs from Renesas. The series has a long market history and high penetration. The 74HCT688 specifically implements magnitude comparison functionality, distinguishing it from other logic gates in the same package family.

Comparators Replacement Considerations

Check for direct equivalents such as the HD74HCT688P or other manufacturers' 74HCT688 variants. Ensure pinout compatibility and electrical specifications match exactly. Verify that any substitute maintains the active-low output characteristic and 8-bit comparison function.