DM74LS112AMX

Overview

The DM74LS112AMX is a dual negative-edge-triggered master-slave J-K flip-flop manufactured by Fairchild Semiconductor. It features independent preset and clear inputs for direct control of output states, along with complementary outputs (Q and Q-bar) for versatile logic interfacing. The device operates within a supply voltage range of 4.75V to 5.25V, with a typical rated voltage of 5V. It utilizes the LS TTL series technology, offering a maximum propagation delay of 28ns. Packaged in a 16-pin Small Outline Integrated Circuit (SOIC), it supports surface-mount assembly and functions across a commercial temperature range.

Feature Summary

• Dual negative-edge-triggered master-slave J-K flip-flop architecture
• Independent active-low preset and clear inputs for immediate state initialization
• Complementary Q and Q-bar outputs providing antiphase signal availability
• Surface-mount SOIC package design for automated PCB assembly

Applications

• Binary counter circuits requiring precise clock edge synchronization
• Shift register configurations for data storage and transfer
• Frequency division stages in digital timing systems
• State machine implementation in sequential logic controllers

Procurement Notes

Verify RoHS compliance status prior to procurement, as specific listings indicate non-compliance for this part number. Confirm the exact manufacturer source, noting that onsemi acquired Fairchild Semiconductor; ensure documentation aligns with current corporate branding. Validate the SOIC-16 package dimensions against board layout requirements. Check for lead-free finish specifications if environmental regulations apply to the final product assembly.

Selection Notes

Select this component when dual J-K flip-flops are required in a compact surface-mount form factor. The LS TTL series offers standard compatibility with legacy digital logic families. Ensure the application voltage remains strictly within the 4.75V to 5.25V range to maintain timing integrity. Consider the 28ns propagation delay for high-speed circuit constraints. Verify that the negative-edge triggering aligns with the system clock polarity requirements.

Part Context

This device belongs to the 74LS112 series, representing a standard dual J-K flip-flop configuration in the Low-power Schottky TTL family. The 'DM' prefix typically denotes a specific manufacturing or packaging variant within Fairchild's portfolio. The 'AMX' suffix indicates the surface-mount SOIC package and tape-and-reel delivery format. This series serves as a fundamental building block for sequential logic designs in industrial and consumer electronics.

Replacement Considerations

Direct substitutes include the SN74LS112N from Texas Instruments or the MC74LS112P from Motorola. For surface-mount equivalents, consider the SN74LS112N or equivalent SOIC packages from other major logic manufacturers. Ensure pinout compatibility and electrical characteristics match before substitution.