DM74S74N

Overview

The DM74S74N is a dual D-type flip-flop manufactured by Fairchild Semiconductor, belonging to the 74S Schottky TTL series. It features positive-edge triggering with set and reset functions. The device operates within a supply voltage range of 4.75V to 5.25V and supports clock frequencies up to 65 MHz. It provides complementary outputs with output currents of 1mA (high) and 20mA (low). Packaged in a 14-pin plastic dual-in-line (DIP) format, it functions across an operating temperature range of 0°C to 70°C.

Feature Summary

• Positive-edge triggered D-type flip-flops with dedicated set and reset inputs
• Schottky clamped design for high-speed switching performance
• Complementary true and inverted outputs per element

Applications

• High-speed shift registers
• Buffer and storage registers
• Pattern generators

Procurement Notes

Verify component authenticity as this part is obsolete. Confirm package integrity and pin alignment against original specifications. Check datasheets for exact timing parameters required by your circuit design. Ensure replacement components match electrical characteristics if sourcing alternatives.

Selection Notes

Select this component for applications requiring fast propagation delays typical of Schottky TTL logic. Consider power dissipation limits relative to system density. Verify that input voltage levels are compatible with standard TTL signaling. Evaluate thermal management requirements for continuous operation at maximum clock speeds.

Part Context

This device is part of the 74S family, known for improved speed over standard 74 series logic. It utilizes ion-implanted Schottky technology to reduce propagation delay while maintaining compatibility with existing TTL systems. The dual configuration allows efficient use of board space for sequential logic circuits.

Replacement Considerations

SN74S74N from Texas Instruments is a confirmed direct substitute.