SN74ALS688DWR

Comparators Overview

The SN74ALS688DWR is an 8-bit identity comparator manufactured by Texas Instruments in the SN74ALS series. It operates within a supply voltage range of 4.5 V to 5.5 V and features active low outputs for A=B comparison logic. The device utilizes a 20-pin SOIC package with surface mount installation. Key electrical specifications include a maximum propagation delay of 20 ns, a maximum power supply current of 19 mA, and an operating temperature range from 0°C to +70°C.

Comparators Feature Summary

• Performs 8-bit identity comparison between two input words
• Provides active low output when input values are equal
• Compatible with standard 5 V logic systems

Comparators Applications

• Digital data validation circuits
• Memory address matching
• Control system equality checks

Comparators Procurement Notes

Verify the specific ordering suffix DWR confirms the tape-and-reel packaging format required for automated assembly processes. Confirm RoHS compliance status and ensure the component meets environmental regulations for the target deployment region. Cross-reference the manufacturer part number against official distributor catalogs to validate authenticity and traceability before finalizing procurement orders.

Comparators Selection Notes

Select this component when high-speed 8-bit equality detection is required within standard 5 V logic environments. The ALS technology offers faster switching speeds compared to standard LS counterparts while maintaining compatible pinouts. Ensure the design accommodates the SOIC-20 footprint and thermal requirements associated with surface mount operations in industrial temperature ranges.

Comparators Part Context

This component belongs to the Texas Instruments SN74ALS family of advanced low-power Schottky logic devices. The SN74ALS688 serves as a specialized digital comparator designed for rapid identification of identical binary sequences. It replaces older discrete comparator solutions by integrating eight-bit comparison functionality into a single integrated circuit package.

Comparators Replacement Considerations

The SN74ALS688DWG4 is listed as a discontinued alternative with the SN74ALS688DWR identified as the manufacturer recommended replacement.