CD74HCT688ME4

Comparators Overview

The CD74HCT688ME4 is an 8-bit magnitude comparator manufactured by Texas Instruments in a 20-SOIC package. It operates on a single 5V supply with a voltage range of 4.5V to 5.5V. The device features high-speed CMOS logic and includes an enable input for controlling comparison operations. Key electrical specifications include a maximum propagation delay of 9ns at 5V and a maximum supply current of 8µA. It supports through-hole or surface-mount installation and functions within a temperature range of -55°C to +125°C.

Comparators Feature Summary

• Provides 8-bit magnitude comparison capabilities with identity detection
• Features high-speed CMOS technology for efficient operation
• Includes an enable input to control comparison functionality

Comparators Applications

• Digital data comparison systems
• Address decoding circuits
• Error checking logic

Comparators Procurement Notes

Verify the specific suffix ME4 indicates the SOIC-20 package variant when sourcing. Confirm RoHS compliance status as per the manufacturer's latest documentation. Ensure the operating environment stays within the specified -55°C to +125°C temperature range. Check for obsolete status updates from Texas Instruments before finalizing procurement plans.

Comparators Selection Notes

Select this component when an 8-bit magnitude comparator with an enable pin is required in a surface-mount design. The HCT logic family ensures compatibility with standard TTL levels while offering CMOS power efficiency. Consider the 20-SOIC package constraints for PCB layout. Verify that the 9ns propagation delay meets the system timing requirements.

Comparators Part Context

This part belongs to the CD74HCT series of high-speed CMOS logic devices from Texas Instruments. It is functionally similar to other 8-bit comparators but offers specific packaging and speed characteristics. The ME4 suffix denotes the tape-and-reel or tube packaging option for the SOIC-20 footprint, distinguishing it from DIP variants like the EE4.

Comparators Replacement Considerations

Direct substitutes may include other 8-bit magnitude comparators with enable inputs from compatible logic families. Verify pinout compatibility and electrical specifications such as supply voltage and propagation delay. Cross-reference with Texas Instruments' official replacement guides for confirmed equivalent parts.