DM74LS174SJ

Overview

The DM74LS174SJ is a Hex D-Type Flip-Flop from the Fairchild Semiconductor 74LS series. It features six positive-edge-triggered flip-flops with single-rail outputs and a direct clear input. The device utilizes TTL circuitry to implement D-type logic, transferring data from D inputs to Q outputs on the positive-going edge of the clock pulse. It operates within a standard voltage range and supports typical clock frequencies up to 40 MHz.

Feature Summary

• Contains six individual D-type flip-flops with single-rail outputs
• Features buffered clock and direct clear inputs for precise control
• Utilizes TTL circuitry for positive-edge triggering

Applications

• Buffer and storage registers
• Shift registers
• Pattern generators

Procurement Notes

Verify the specific suffix SJ against official datasheets to confirm package type and material specifications. Ensure compatibility with existing TTL logic levels and power supply requirements. Confirm availability status as legacy components may have limited production runs or require alternative sourcing strategies.

Selection Notes

Select this component when a hex configuration of D-type flip-flops is required in a TTL environment. Consider the 40 MHz typical clock frequency limit and 14 mW power dissipation per flip-flop. Evaluate if the single-rail output format meets system design needs compared to complementary output variants.

Part Context

This part belongs to the 74LS (Low-power Schottky) family, known for improved speed over standard LS logic while maintaining low power consumption. The DM prefix typically denotes military or enhanced grade specifications in Fairchild's nomenclature, indicating robust performance characteristics suitable for demanding applications.

Replacement Considerations

Compatible substitutes include the MM74LS174N and other 74LS174 variants from manufacturers like Motorola or Hitachi. Verify pinout compatibility and electrical parameters before substitution.