DM54LS279W/883

Latches Overview

The DM54LS279W/883 is a quadruple S-R latch manufactured by National Semiconductor, now part of Texas Instruments. It features four independent circuits housed in a 16-lead ceramic flatpack (CDFP16) package. The device operates with a nominal supply voltage of 5 V and supports an extended temperature range from -55°C to 125°C. Key electrical specifications include a propagation delay of 27 ns at 5 V with a 15 pF load, an output high current of 400 µA, and an output low current of 4 mA.

Latches Feature Summary

• Contains four independent S-R latch circuits
• Low level triggered logic operation
• Ceramic flatpack construction for durability
• Extended military-grade temperature capability

Latches Applications

• Military aerospace data storage systems
• High-reliability industrial control logic
• Ruggedized communication equipment interfaces

Latches Procurement Notes

Verify the authenticity of the National Semiconductor or Texas Instruments marking on the component body. Confirm the presence of the /883 suffix indicating compliance with MIL-PRF-38534 or similar military standards. Inspect the ceramic flatpack leads for integrity and ensure the package matches the CDFP16 specification. Request batch traceability documentation to validate the operating temperature range and screening level required for mission-critical deployments.

Latches Selection Notes

Select this component when designing systems requiring multiple independent latches within a single rugged package. The LS series offers lower power consumption compared to standard TTL while maintaining compatible logic levels. The ceramic flatpack form factor is suitable for applications where hermetic sealing and thermal stability are critical. Ensure the design accommodates the specific propagation delay and drive current characteristics defined in the datasheet.

Latches Part Context

This part belongs to the DM54LS279 family of quadruple S-R latches. The /883 designation signifies that the device meets military quality standards, distinguishing it from commercial variants. National Semiconductor was acquired by Texas Instruments, which continues to support these legacy high-reliability components for defense and aerospace markets.

Latches Replacement Considerations

Direct substitutes include other DM54LS279 variants with identical pinouts and functionality. Verify that any replacement maintains the same ceramic flatpack package and military temperature rating. Cross-reference with Texas Instruments documentation to confirm equivalent electrical parameters and mechanical dimensions.