SN74LS688DW

Overview

The SN74LS688DW is an 8-bit identity comparator from the 74LS series, manufactured by onsemi. It operates within a supply voltage range of 4.85V to 5.25V and features low-active outputs that indicate equality (A=B). The device utilizes Low Power Schottky technology and is housed in a 20-SOIC package with a width of 7.50mm. It supports surface mount installation and functions within an operating temperature range of 0°C to 70°C. Propagation delay is specified at 23ns under 5V supply and 45pF load conditions.

Feature Summary

• Provides 8-bit magnitude comparison functionality with active-low output signaling when input vectors are identical.

Applications

• Digital data validation circuits requiring equality checks

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels due to obsolete status. Confirm RoHS compliance requirements as the part may not meet current environmental standards. Validate package integrity and pin configuration against the 20-SOIC specification before integration into production systems.

Selection Notes

Select this component for legacy TTL-compatible designs requiring 8-bit identity comparison. Ensure power supply stability within the 4.85V to 5.25V range to maintain signal integrity. Consider thermal management for operation near the upper limit of the 70°C junction temperature rating.

Part Context

This part belongs to the 74LS logic family, characterized by Low Power Schottky technology. It serves as a digital comparator within integrated circuit logic families, specifically designed for identity verification tasks in standard TTL voltage environments.

Replacement Considerations

Public confirmed substitute part numbers: None identified in provided documentation.