CD74HCT688EE4

Comparators Overview

The CD74HCT688EE4 is an 8-bit magnitude comparator from Texas Instruments, part of the CD74HCT688 series. It operates within a supply voltage range of 4.5 V to 5.5 V and features active-low outputs for identity detection (A=B). The device utilizes High-Speed CMOS logic technology, ensuring low power consumption with a maximum supply current of 8 µA. Propagation delays are specified at 9 ns and 14 ns. It is housed in a PDIP-20 package suitable for through-hole mounting and supports an operating temperature range from -55°C to +125°C.

Comparators Feature Summary

• Performs 8-bit binary magnitude comparison to determine identity between two inputs
• Utilizes High-Speed CMOS technology for efficient performance
• Provides active-low output signaling for equality conditions

Comparators Applications

• Computer logic applications requiring data verification
• Digital systems needing 8-bit magnitude comparison
• Logic circuits designed for input equality detection

Comparators Procurement Notes

Verify the specific suffix EE4 confirms the PDIP-20 package and extended temperature rating when sourcing. Confirm RoHS compliance status via the manufacturer's official documentation prior to integration. Ensure design compatibility with 5V logic levels and check that the active-low output polarity aligns with downstream circuit requirements. Validate lead times as manufacturing cycles may vary.

Comparators Selection Notes

Select this component when an 8-bit identity comparator is required within standard digital logic families. The HCT series ensures compatibility with TTL-driven systems while offering CMOS power advantages. Consider the PDIP-20 form factor if through-hole assembly is mandated. Verify that the 4.5V to 5.5V operating range meets system power constraints and that the propagation delay specifications satisfy timing requirements.

Comparators Part Context

This device belongs to the CD74HCT688 family of high-speed CMOS logic comparators. It is engineered for computer and logic applications demanding precise 8-bit binary comparison. The HCT designation indicates compatibility with standard TTL logic levels, facilitating integration into mixed-technology systems. The EE4 suffix typically denotes specific packaging and environmental compliance attributes defined by the manufacturer.

Comparators Replacement Considerations

Consult official substitution guides for equivalent 8-bit magnitude comparators. Verify pinout compatibility and electrical characteristics such as supply voltage and propagation delay before replacing. Generic equivalents may differ in package style or output drive strength.