SN74LS74AM

Flip Flops Overview

The SN74LS74AM is a dual D-type positive edge-triggered flip-flop manufactured by onsemi using low power Schottky (LS) TTL circuitry. It contains two independent flip-flops, each with separate data (D), clock (CP), preset (PRE), and clear (CLR) inputs, along with complementary Q and Q-bar outputs. The device operates within a supply voltage range of 4.75 V to 5.25 V. Key electrical parameters include a propagation delay of 15 ns and an output current capability of 8 mA for both high and low states. It features a standard 14-pin DIP package suitable for through-hole mounting.

Flip Flops Feature Summary

• Dual independent D-type flip-flops with positive edge triggering
• Asynchronous active-low preset and clear inputs
• Complementary Q and Q-bar outputs for each flip-flop
• High-speed operation utilizing low power Schottky TTL technology

Flip Flops Applications

• Parallel-to-serial data conversion circuits
• Shift register construction
• Timing control and synchronization logic
• Pulse generation and waveform shaping

Flip Flops Procurement Notes

Verify the manufacturer marking matches onsemi specifications rather than generic LS74 labels. Confirm the suffix 'AM' corresponds to the specific plastic DIP package variant. Request the official datasheet to validate pinout compatibility with legacy designs. Ensure the operating temperature range meets system requirements. Cross-reference the ordering part number with distributor catalogs to avoid confusion with HC or HCT families.

Flip Flops Selection Notes

Select this component when interface compatibility with existing LSTTL logic levels is required. Choose this part for applications needing moderate switching speeds with reliable noise immunity. Consider the dual configuration to minimize board space compared to single flip-flop ICs. Evaluate the 14-pin DIP package for prototyping or through-hole manufacturing processes. Verify that the 5V supply voltage aligns with the system power architecture.

Flip Flops Part Context

The SN74LS74AM belongs to the 74LS series of digital logic integrated circuits produced by onsemi. This series is characterized by low power Schottky technology, offering a balance between speed and power consumption. The device serves as a fundamental building block in sequential logic design, providing data storage capabilities within larger digital systems.

Flip Flops Replacement Considerations

• MC74LS74N
• MM74LS74N

Flip Flops FAQ

How are the preset and clear inputs activated?

The preset and clear inputs are active-low, meaning they trigger their respective functions when held at a low logic level, independent of the clock signal.

What triggers the data transfer in this flip-flop?

Data is transferred from the D input to the Q output on the positive-going edge of the clock pulse.