DM74LS74AM

Overview

The DM74LS74AM is a dual D-type flip-flop manufactured by onsemi, belonging to the 74LS logic series. It features Schottky TTL circuitry for high-speed operation and includes individual preset and clear inputs that are independent of the clock signal. The device provides complementary Q and Q outputs and operates within a supply voltage range of 4.75V to 5.25V. Packaged in a 14-SOIC surface-mount format, it supports an operating temperature range of 0°C to 70°C with a maximum propagation delay of 33ns at 5V.

Feature Summary

• Dual positive-edge-triggered D-type flip-flops with independent data, preset, clear, and clock inputs
• Complementary Q and Q outputs for versatile logic interfacing
• Schottky TTL construction ensuring high speed and low power consumption
• Functionally compatible with standard 74LS logic family pinouts

Applications

• Parallel data storage and register circuits
• Shift register configurations
• Timing control and synchronization logic
• State machine implementation

Procurement Notes

Verify component authenticity through authorized distribution channels or direct manufacturer engagement. Confirm RoHS compliance status and specific package variant availability prior to ordering. Request official datasheets and quality certifications to ensure adherence to specified electrical parameters and operational temperature ranges.

Selection Notes

Select this component for applications requiring high-speed switching within standard 5V logic environments. Ensure design compatibility with Schottky TTL input thresholds and output drive capabilities. Consider thermal management requirements for the SOIC-14 package when integrating into dense PCB layouts.

Part Context

This part belongs to the DM74LS series, representing advanced Schottky logic technology from onsemi. It serves as a legacy solution for designs transitioning from older discrete logic to integrated timing elements while maintaining backward compatibility with established 74LS system architectures.

Replacement Considerations

SN74LS74D (Texas Instruments)

FAQ

How does the DM74LS74AM handle asynchronous inputs?

Preset and clear inputs operate independently of the clock signal, allowing immediate state changes regardless of clock activity.

What is the typical propagation delay for this device?

The maximum propagation delay is specified as 33ns when tested at 5V with a 50pF load.