SN74HCT273NS

Flip Flops Overview

The SN74HCT273NS is an octal D-type flip-flop manufactured by Texas Instruments, belonging to the HCT logic series. It features eight 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 and utilizes a 20-pin SOIC package for surface-mount installation. It provides non-inverting outputs and supports a maximum propagation delay of 34 ns at 5.5 V with a 50 pF load.

Flip Flops Feature Summary

• Contains eight independent D-type flip-flops triggered on the positive edge of the clock signal
• Includes a dedicated master reset input that forces all outputs low independently of clock or data states
• Accepts TTL-compatible input levels while providing CMOS output drive capabilities

Flip Flops Applications

• Octal data storage and buffering in digital systems
• Parallel-to-serial conversion circuits
• State machine implementation requiring multiple synchronized memory elements

Flip Flops Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm exact package dimensions and tape-and-reel specifications. Ensure the ordered component matches the required operating temperature range and electrical characteristics defined in the current datasheet revision before integration into final designs.

Flip Flops Selection Notes

Select this component when TTL-level interface compatibility is required alongside CMOS output performance. The HCT series ensures logical compatibility with standard TTL inputs while offering improved noise immunity compared to older LS variants. Consider the 20-SOIC package constraints regarding PCB space and thermal dissipation requirements.

Flip Flops Part Context

This part belongs to the widely adopted 74HCT family of logic integrated circuits, designed to bridge the gap between legacy TTL systems and modern CMOS technologies. The SN74HCT273 variant specifically addresses applications needing high-density octal storage within a single compact package, maintaining backward compatibility with established system architectures.

Flip Flops Replacement Considerations

SN74HCT273NSR (Tape and Reel version)

Flip Flops FAQ

How does the master reset function interact with the clock signal?

A LOW signal on the master reset input forces all eight outputs to a LOW state immediately, regardless of the current status of the clock or data inputs.

What are the input logic level requirements for this device?

As an HCT series device, it accepts standard TTL logic levels as inputs, ensuring compatibility with other TTL-driven components in the circuit.