JD54LS279B2A

Latches Overview

The JD54LS279B2A is a military-grade quad R/S latch manufactured by National Semiconductor. It belongs to the 54LS series of high-speed low-power Schottky TTL logic devices. The component features four independent latches, each capable of functioning as either a NOR or NAND type depending on input configuration. Designed for operation in harsh environments, it supports extended temperature ranges typical of military specifications. The device utilizes a standard plastic dual in-line package with three pins per latch, providing Set, Reset, and Data inputs alongside a single output.

Latches Feature Summary

• Military-grade reliability for extended environmental conditions
• Quad configuration with independent R/S latch functionality
• High-speed low-power Schottky TTL technology
• Flexible NOR/NAND input compatibility

Latches Applications

• Military avionics control systems
• Spacecraft data handling units
• Ruggedized industrial memory registers
• Defense communication equipment state storage

Latches Procurement Notes

Verify that the supplier provides full traceability documentation including lot codes and manufacturing dates. Confirm compliance with MIL-PRF-38534 or equivalent military standards. Request test reports verifying performance across the specified military temperature range. Ensure packaging meets moisture sensitivity and electrostatic discharge protection requirements for sensitive military components.

Latches Selection Notes

Select this component when military qualification is mandatory for the application. Compare pinout compatibility with existing circuit designs requiring quad latches. Evaluate power consumption against other 54-series options if battery life is critical. Verify voltage levels match the system's logic family requirements for seamless integration without additional level shifting.

Latches Part Context

This part is part of the broader 54-series logic family, distinguished from commercial 74-series parts by stricter manufacturing controls and wider operating temperature ranges. National Semiconductor, now part of Texas Instruments, produced these components for defense and aerospace sectors. The JD prefix often denotes specific military screening or packaging variations within the standard 54LS279 architecture.

Latches Replacement Considerations

Direct substitutes include the 54LS279 from other qualified manufacturers such as Motorola or Signetics. Verify that any replacement maintains the same military grade certification and pin compatibility. Cross-reference datasheets to ensure identical electrical characteristics and timing parameters are met for critical path applications.