DM54LS273E/883

Overview

The DM54LS273E/883 is an octal D-type flip-flop with a positive-edge-triggered clock and active-low asynchronous clear, manufactured by National Semiconductor under MIL-STD-883 qualification. It features three-state outputs for bus-driven applications. The device operates within a temperature range of -55°C to 125°C and requires a nominal 5V supply. Packaged in a ceramic flatpack (CDFP20), it provides reliable performance for military and aerospace digital logic systems requiring high noise immunity and low power consumption.

Feature Summary

• Octal D-type flip-flop architecture with eight independent storage elements
• Positive-edge-triggered clocking mechanism for precise data capture
• Active-low asynchronous clear input for immediate output reset
• Three-state outputs enabling direct bus interfacing without external buffers

Applications

• Military-grade digital signal processing systems
• Aerospace telemetry and command data registers
• High-reliability computer memory address latching
• Industrial control system state retention modules

Procurement Notes

Verify that the component carries valid MIL-STD-883 certification marks indicating compliance with military quality standards. Confirm the presence of the 'E' suffix denoting the specific ceramic flatpack variant and ensure traceability documentation matches National Semiconductor or Texas Instruments manufacturing records. Inspect for physical integrity of the ceramic package and lead frame to guarantee suitability for harsh operational environments.

Selection Notes

Select this component when designing systems requiring octal data storage with bus-compatible outputs under extreme thermal conditions. The LS series technology offers a balance of speed and power dissipation suitable for complex digital architectures. Ensure circuit design accommodates the asynchronous clear functionality and positive-edge triggering requirements inherent to this specific logic family configuration.

Part Context

This part belongs to the DM54LSxx series, representing Low-Power Schottky TTL logic devices qualified for military standards. The DM54LS273 specifically implements octal D-flip-flop functionality. As a National Semiconductor product now managed by Texas Instruments, it maintains legacy compatibility with established military electronic designs while adhering to rigorous reliability criteria defined in defense procurement specifications.

Replacement Considerations

Consider DM54LS273J/883 for dual-in-line package alternatives if pinout compatibility allows. Verify functional equivalence with other MIL-qualified octal D-flip-flops from authorized distributors. Cross-reference datasheets to confirm matching electrical characteristics and timing parameters before substitution.