SN74LS74AN

Flip Flops Overview

The SN74LS74AN is a dual D-type positive-edge-triggered flip-flop from Texas Instruments' LS logic series. It features independent preset and clear inputs that operate independently of the clock signal. The device includes complementary Q and Q outputs, operates within a 4.75V to 5.25V supply range, and supports propagation delays of 40ns. Packaged in a 14-pin PDIP for through-hole mounting.

Flip Flops Feature Summary

• Dual positive-edge-triggered D-type flip-flops with independent data inputs
• Asynchronous active-low preset and clear control functions
• Complementary Q and Q outputs for versatile logic interfacing

Flip Flops Applications

• Parallel data storage and buffering circuits
• Shift register construction and implementation
• Frequency division and digital timing applications

Flip Flops Procurement Notes

Verify the specific manufacturer part number against official Texas Instruments documentation to confirm pinout compatibility and electrical specifications. Ensure the procurement source provides valid RoHS compliance certificates and original manufacturer datasheets. Cross-reference package details to confirm the 14-pin DIP configuration matches design requirements before finalizing orders.

Flip Flops Selection Notes

Select this component for designs requiring standard TTL-compatible logic levels and moderate switching speeds. The LS family offers improved power consumption compared to standard TTL while maintaining compatible noise margins. Verify that the application voltage remains strictly within the specified 4.75V to 5.25V range to ensure reliable operation and prevent device damage.

Flip Flops Part Context

This device belongs to the widely adopted 74LS series of bipolar logic integrated circuits. It serves as a fundamental building block for sequential logic systems. The SN74LS74AN variant specifically denotes the plastic DIP package version, distinguishing it from ceramic or surface-mount alternatives within the same logical family.

Flip Flops Replacement Considerations

• SN74LS74ADR
• SN74LS74A

Flip Flops FAQ

How do the preset and clear inputs function relative to the clock?

The preset and clear inputs are asynchronous and active-low. They force the output to a defined state regardless of the clock signal or data input levels.

What is the trigger mechanism for data transfer?

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