M74HCT273B1R

Flip Flops Overview

The M74HCT273B1R is an octal D-type flip-flop manufactured by STMicroelectronics, belonging to the 74HCT logic series. It features a single element with eight bits per element and utilizes positive-edge triggering for data capture. The device operates within a supply voltage range of 4.5V to 5.5V and supports a maximum clock frequency of 80 MHz. It exhibits a typical propagation delay of 30ns at 4.5V with 50pF load and provides non-inverted outputs capable of sourcing and sinking 4mA. Packaged in a 20-DIP format with a width of 0.300 inches (7.62mm), it is designed for through-hole mounting and functions across an industrial temperature range of -55°C to +125°C.

Flip Flops Feature Summary

• Octal D-type flip-flop architecture with positive-edge triggering mechanism
• High-speed CMOS technology compatible with TTL input levels
• Master reset functionality for synchronous clearing of all outputs
• Non-inverting output configuration with standard drive capability

Flip Flops Applications

• Parallel-to-serial data conversion circuits
• Register storage elements in digital systems
• Shift register configurations for data processing
• Memory buffer applications in microprocessor interfaces

Flip Flops Procurement Notes

This component is officially classified as obsolete and no longer manufactured by STMicroelectronics. Procurement should focus on verified surplus stock or authorized distributors holding remaining inventory. Buyers must verify part authenticity due to potential availability of older production runs. Cross-referencing with active replacement parts from other manufacturers is recommended for new designs to ensure long-term supply chain stability and compatibility.

Flip Flops Selection Notes

Select this component only for legacy system maintenance or repair where original specifications are mandatory. For new designs, consider alternative octal D-type flip-flops from the same logic family that are currently in active production. Evaluate pinout compatibility and electrical characteristics against modern equivalents to ensure seamless integration without requiring significant circuit redesign or component substitution.

Flip Flops Part Context

The M74HCT273B1R is part of the broader 74HCT273 product line, which includes various package options such as SOIC and TSSOP. This specific variant denotes the DIP package form factor. It shares functional equivalence with other octal D-type flip-flops in the industry but is distinguished by its specific through-hole packaging and STMicroelectronics manufacturing origin within the HCT logic family standards.

Flip Flops Replacement Considerations

CD74HCT273E (Texas Instruments) and SN74HCT273N (Texas Instruments) are confirmed similar substitutes.