SN74LS74AD

Flip Flops Overview

The SN74LS74AD is a dual positive-edge-triggered D-type flip-flop manufactured by Texas Instruments. It operates within a supply voltage range of 4.75 V to 5.25 V and features independent Set and Reset inputs. The device provides complementary outputs (Q and Q-bar) and supports a maximum clock frequency of 33 MHz. Key electrical parameters include a propagation delay of 40 ns at 5 V, a high-level output current of -400 µA, and a low-level output current of 8 mA. It is housed in a 14-SOIC package with a width of 3.90 mm.

Flip Flops Feature Summary

• Dual positive-edge-triggered D-type flip-flops with independent asynchronous Set and Reset controls.

Flip Flops Applications

• Data storage and register applications
• Shift registers
• Frequency division circuits

Flip Flops Procurement Notes

Verify the specific suffix against official documentation to confirm package type and tape/reel specifications. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer. Ensure the ordering part number matches the required logic family and pinout configuration for your design.

Flip Flops Selection Notes

Select this component for designs requiring dual D-type flip-flops with asynchronous preset and clear functions. Consider the 40 ns propagation delay and 33 MHz maximum clock frequency for timing analysis. Verify that the SOIC-14 package dimensions fit the PCB layout constraints and thermal requirements of the application.

Flip Flops Part Context

The SN74LS74AD belongs to the Texas Instruments SN74LS74A series, which utilizes Low Power Schottky (LS) TTL technology. This series offers improved power dissipation characteristics compared to standard TTL while maintaining compatible logic levels. The 'A' designation typically indicates an updated version of the original SN74LS74.

Flip Flops Replacement Considerations

SN74LS74ADR

Flip Flops FAQ

What are the input types for the Set and Reset pins?

The Set and Reset inputs are active-low asynchronous inputs that override the clock and data inputs when activated.

Does the SN74LS74AD provide both true and complement outputs?

Yes, each flip-flop provides complementary outputs labeled Q and Q-bar.