54LS112FM

Overview

The 54LS112FM is a dual J-K flip-flop manufactured by National Semiconductor, belonging to the 54LS series of TTL logic. It features two independent negative-edge-triggered flip-flops with complementary outputs and asynchronous preset and clear inputs. The device utilizes a ceramic flatpack (FM) package configuration suitable for military or high-reliability applications.

Feature Summary

• Dual independent J-K flip-flops with negative-edge triggering
• Asynchronous preset and clear control inputs
• Complementary Q and not-Q outputs per flip-flop

Applications

• Military-grade digital logic circuits
• High-reliability data storage systems
• Industrial control registers

Procurement Notes

Verify the manufacturer origin as National Semiconductor or its successor entities. Confirm the FM suffix indicates the specific ceramic flatpack package type. Ensure compatibility with required military temperature ranges if applicable.

Selection Notes

Select this component when dual J-K functionality with asynchronous controls is required in a ruggedized ceramic package. Compare against plastic DIP variants like SN54LS112N for environmental tolerance differences.

Part Context

Part of the 54LS family offering low-power Schottky performance. The 54-series designation typically implies extended temperature range capabilities compared to commercial 74-series equivalents.

Replacement Considerations

Check for direct equivalents such as DM54LS112A from National Semiconductor or compatible parts from other manufacturers offering the same 54LS logic family specifications.