DM74ALS74AM

Overview

The DM74ALS74AM is a dual D-type flip-flop manufactured by onsemi, belonging to the 74ALS logic family. It features independent data, preset, and clear inputs, with positive-edge triggering. The device operates within a supply voltage range of 4.5V to 5.5V and supports a maximum propagation delay of 18ns at 5V with 50pF load. Output drive capabilities include 8mA low-level and -400µA high-level current. It is housed in a 14-SOIC surface-mount package and rated for an operating temperature range of 0°C to 70°C.

Feature Summary

• Dual D-type edge-triggered flip-flops with independent clock, data, preset, and clear inputs
• High-speed ALS logic performance with 18ns propagation delay
• Robust output drive capability with 8mA sink current
• Compatible with standard 74LS logic pinouts and functionality

Applications

• Parallel-to-serial data conversion circuits
• Shift register construction
• Timing and synchronization logic modules
• State machine implementation

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to end-of-life status. Confirm RoHS compliance and specific ordering suffixes against official datasheets. Request lot traceability documentation for quality assurance. Validate that replacement sources provide equivalent electrical specifications and packaging formats to ensure seamless integration into existing designs.

Selection Notes

Select this component for applications requiring dual D-flip-flops with high-speed switching characteristics typical of the ALS family. Ensure the design accommodates the 4.5V to 5.5V supply requirement and 0°C to 70°C temperature range. Consider the 14-SOIC package dimensions for PCB layout constraints. Verify compatibility with upstream logic levels and downstream load requirements regarding the specified output currents.

Part Context

This part belongs to the DM74ALS series, representing Advanced Low-power Schottky TTL logic. It provides faster switching speeds than standard LS logic while maintaining lower power consumption than original TTL families. The DM prefix typically denotes commercial grade temperature ranges and specific manufacturing lines within the onsemi portfolio.

Replacement Considerations

• SN74ALS74N Texas Instruments
• SN74ALS74NSR Texas Instruments
• MC74ALS74AN Motorola/Freescale

FAQ

What is the trigger mechanism for the DM74ALS74AM?

The device uses positive-edge triggering, transferring the data input state to the output on the rising edge of the clock pulse.

How are the preset and clear functions controlled?

Preset and clear are asynchronous inputs that operate independently of the clock signal, activated by a low logic level at their respective pins.