MC74HCT273AN

Flip Flops Overview

The MC74HCT273AN is an octal D-type flip-flop manufactured by onsemi, belonging to the HCT logic series. It features eight independent positive-edge triggered D 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. 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. It utilizes a 20-pin DIP package for through-hole mounting and supports an operating temperature range from -55°C to +125°C.

Flip Flops Feature Summary

• Octal configuration providing eight independent D-type flip-flops sharing a single clock and reset line
• HCT logic compatibility allowing direct interface with TTL inputs while maintaining CMOS performance
• Asynchronous active-low master reset function that forces all outputs low independently of clock or data states

Flip Flops Applications

• Parallel-to-serial data conversion circuits requiring synchronized storage
• General-purpose digital memory elements in microprocessor-based systems
• State register applications in sequential logic control systems

Flip Flops Procurement Notes

Verify component authenticity through authorized onsemi distributors or certified partners. Confirm RoHS compliance status and manufacturing date codes against current project requirements. Check for potential obsolescence or lifecycle changes as availability may vary. Ensure proper handling procedures are followed due to moisture sensitivity classification if applicable. Validate pinout compatibility with existing PCB layouts before integration.

Flip Flops Selection Notes

Select this component when TTL-compatible input levels are required alongside CMOS output drive capabilities. The HCT series ensures reliable operation in mixed-logic environments where standard HC devices might not interface correctly with legacy TTL signals. Consider the 20-pin DIP package constraints for through-hole assembly processes. Evaluate thermal management needs given the wide operating temperature range and power dissipation characteristics inherent to the technology node.

Flip Flops Part Context

This part belongs to the widely adopted 74HCT family of digital logic integrated circuits, designed to bridge the gap between older TTL standards and modern CMOS technologies. The 74HCT273 variant specifically provides octal storage functionality, making it a staple in educational kits and industrial control boards. Its pinout compatibility with earlier LS-series counterparts facilitates straightforward upgrades in existing designs without requiring significant schematic modifications.

Flip Flops Replacement Considerations

MC74HCT273ADWR2G

Flip Flops FAQ

Is the master reset input synchronous or asynchronous?

The master reset (MR) input is asynchronous and active-low, meaning it forces all outputs to a low state immediately regardless of the clock signal or data input conditions.

What is the maximum operating supply voltage for this device?

The maximum operating supply voltage is 5.5 V, with a minimum of 4.5 V, ensuring compatibility with standard 5V logic systems.