CD74HCT273M

Overview

The CD74HCT273M is a high-speed CMOS logic octal D-type flip-flop manufactured by Harris Corporation. It features eight positive-edge triggered D-type flip-flops with a master reset input in a 20-pin SOIC package. The device operates within a supply voltage range of 4.5V to 5.5V and supports an operating temperature range from -55°C to 125°C. Key electrical parameters include a maximum frequency of 16 MHz at nominal supply, a load capacitance of 50 pF, and a maximum output current (Iol) of 0.004 A. It complies with RoHS standards and has a moisture sensitivity level of 1.

Feature Summary

• Octal configuration providing eight independent positive-edge triggered D-type flip-flops
• Master reset functionality that forces outputs low independently of clock and data inputs
• High-speed CMOS technology compatible with TTL input levels for the HCT series
• Robust industrial temperature rating supporting operation from -55°C to 125°C

Applications

• Parallel-to-serial data conversion circuits
• General-purpose register storage applications
• State machine implementation in digital logic systems
• Buffering and latching of digital signals in high-speed interfaces

Procurement Notes

Verify the manufacturer origin carefully, as Harris Corporation's semiconductor assets were acquired by Texas Instruments. Ensure the specific part number matches the required package type and lead finish. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Cross-reference datasheets between original Harris documentation and current TI equivalents to ensure pinout and electrical parameter consistency before finalizing procurement.

Selection Notes

Select this component when an octal D-type flip-flop with a global reset is required for high-speed digital applications. The HCT series ensures compatibility with standard TTL logic levels while offering CMOS noise immunity. Consider the 20-SOIC package for surface-mount assembly needs. Evaluate the 16 MHz maximum frequency against your system clock requirements. Verify that the -55°C to 125°C temperature range meets your environmental specifications.

Part Context

The CD74HCT273M belongs to the 74HCT family of high-speed CMOS logic devices originally developed by Harris Corporation. This family bridges the gap between standard CMOS and TTL logic by maintaining CMOS power advantages while accepting TTL input voltages. The octal D-type flip-flop architecture is a fundamental building block in digital electronics, widely used for data storage and synchronization. Harris was a significant contributor to this logic standard before its semiconductor division was integrated into other major manufacturers.

Replacement Considerations

• CD74HCT273E
• SN74HCT273N