DM74S374N

Overview

The DM74S374N is an octal D-type flip-flop manufactured by Fairchild Semiconductor, belonging to the Schottky TTL (74S) logic family. It features eight independent D-type flip-flops with positive-edge triggering and three-state outputs. The device is housed in a 20-pin dual in-line package (PDIP). Key electrical parameters include a propagation delay of 10 ns at 5V with 150pF load, operating voltage range of 4.75V to 5.25V, and output current capabilities of 15mA high and 64mA low. It operates within a temperature range of 0°C to 70°C.

Feature Summary

• Octal configuration providing eight independent D-type flip-flops for parallel data storage
• Three-state outputs allowing direct connection to bus systems without external buffers
• Positive-edge clock triggering ensures precise data transfer timing relative to signal edges

Applications

• Buffer and storage registers in digital systems
• Shift register implementations for serial-to-parallel conversion
• Pattern generators requiring multiple synchronized data states

Procurement Notes

Verify the specific manufacturer source, as this part number may be sourced from Fairchild, National Semiconductor, or Texas Instruments due to historical cross-manufacturing agreements. Confirm the package type matches the required DIP-20 form factor and check for lead-free compliance if RoHS standards are mandatory for the target assembly process.

Selection Notes

Select this component when high-speed switching performance is critical compared to standard LS series options. The Schottky technology offers faster propagation delays suitable for demanding timing applications. Ensure the design accommodates the higher power dissipation inherent to S-TTL logic families compared to lower-power CMOS alternatives.

Part Context

This component is part of the broader 74Sxx series of advanced Schottky TTL logic devices. It serves as a high-speed memory element within digital circuit architectures. The octal format allows for efficient handling of 8-bit data words, making it a fundamental building block for complex sequential logic designs requiring rapid state changes.

Replacement Considerations

Direct functional substitutes include the DM74LS374N for slower speed requirements and the DM74AS374N for potentially improved AC performance. Cross-reference pinouts carefully, as some variants may differ in enable pin configurations or output drive strengths.