MM74HCT273SJ

Flip Flops Overview

The MM74HCT273SJ is an octal D-type flip-flop manufactured by onsemi, formerly Fairchild Semiconductor. It belongs to the HCT logic series and features eight independent positive-edge triggered D-type flip-flops with a common clock and master reset input. The device operates within a supply voltage range of 4.5 V to 5.5 V. It utilizes a 20-pin SOP package for surface mount installation. Key electrical parameters include a propagation delay of 37 ns, high-level output current of -4.8 mA, and low-level output current of 4.8 mA. The component supports single-ended inputs and outputs.

Flip Flops Feature Summary

• Octal configuration providing eight independent D-type flip-flops in a single integrated circuit
• Positive-edge triggering mechanism synchronized by a common clock signal
• Master reset functionality that forces all outputs LOW independently of clock and data states
• HCT logic compatibility ensuring TTL-compatible input levels

Flip Flops Applications

• Parallel-to-serial data conversion circuits
• Shift register implementations
• General-purpose storage registers in digital systems
• Timing synchronization applications

Flip Flops Procurement Notes

Verify the manufacturer designation carefully, as the part was originally produced by Fairchild Semiconductor before its acquisition by onsemi. Confirm the specific suffix 'SJ' corresponds to the SOP-20 package variant. Check RoHS compliance status through official documentation. Ensure the source provides valid traceability for legacy components. Validate that the ordering information matches the exact pinout and electrical specifications required for your design.

Flip Flops Selection Notes

Select this component when an octal storage solution with TTL-compatible inputs is required. The HCT series ensures compatibility with standard TTL logic families while offering CMOS performance characteristics. Consider the SOP-20 package constraints regarding board space and thermal management. Evaluate the 37 ns propagation delay against system timing requirements. Verify that the 4.5 V to 5.5 V operating range aligns with the target power supply architecture.

Flip Flops Part Context

The MM74HCT273SJ is part of the broader 74HCT273 family of octal D-type flip-flops. This family includes variants from multiple manufacturers such as Texas Instruments, NXP, and STMicroelectronics. The Fairchild/Onsemi version specifically denotes the SOP-20 surface mount package. It serves as a fundamental building block for sequential logic designs requiring parallel data storage and controlled output updates based on clock transitions.

Flip Flops Replacement Considerations

CD74HCT273M (Texas Instruments)

Flip Flops FAQ

What is the trigger type of the MM74HCT273SJ?

The device uses positive-edge triggering, meaning the outputs update based on the LOW-to-HIGH transition of the clock signal.

How does the master reset function operate?

A LOW signal on the master reset input forces all eight outputs LOW, regardless of the clock or data input states.

What is the recommended supply voltage range?

The component operates within a supply voltage range of 4.5 V to 5.5 V.