DM74LS112AM

Overview

The DM74LS112AM is a dual JK negative edge-triggered flip-flop manufactured by Fairchild Semiconductor. It features two independent logic elements within a 16-lead Small Outline Integrated Circuit (SOIC) package, specifically JEDEC MS-012 with a 0.300-inch width. The device operates on a standard 5V supply voltage, ranging from 4.75V to 5.25V. It supports a commercial temperature range of 0°C to 70°C. Key electrical characteristics include asynchronous preset and clear inputs that are independent of the clock signal, allowing direct control over output states.

Feature Summary

• Contains two independent JK flip-flops triggered by the falling edge of the clock signal
• Features asynchronous Direct Set and Clear inputs for immediate state control
• Provides complementary Q and Q outputs for versatile logic interfacing
• Designed for high-speed applications within the advanced low power Schottky family

Applications

• Synchronous digital counters and frequency dividers
• Shift registers for serial-to-parallel data conversion
• State machines and sequential logic control circuits
• Memory address latching in microprocessor systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and environmental compliance. Ensure the component matches the required SOIC-16 footprint and pin configuration. Cross-reference the date code and lot number with quality documentation. Confirm that the asynchronous input logic levels align with the system design requirements before integration.

Selection Notes

Select this component when dual independent JK functionality is required in a compact surface-mount format. Consider the negative edge-triggering characteristic for timing synchronization. Evaluate the propagation delay specifications against the system clock speed. Compare power consumption and noise immunity against other logic families if operating in sensitive environments.

Part Context

This device belongs to the 74LS series of TTL logic integrated circuits, known for balanced performance between speed and power dissipation. The DM prefix typically denotes a specific manufacturing line or variant within Fairchild's portfolio. As a legacy component, it serves as a foundational building block for classic digital design architectures and compatibility with older system standards.

Replacement Considerations

Equivalent parts include the SN74LS112 from Texas Instruments and the MC74LS112P from ON Semiconductor. Verify pinout compatibility and electrical parameter tolerances before substitution. Check for any differences in input capacitance or output drive strength that might affect signal integrity in high-speed designs.