CD74HC273E

Overview

The CD74HC273E is a high-speed CMOS logic octal D-type flip-flop manufactured by Texas Instruments. It features eight independent D-type flip-flops with positive-edge triggering and an asynchronous master reset. The device operates within a supply voltage range of 2 V to 6 V and supports data rates up to 20 MHz. It is housed in a 20-pin PDIP package, designed for through-hole mounting. The component functions as a non-inverting output buffer with a propagation delay of 150 ns at 50 pF load capacitance. It complies with RoHS standards and is lead-free.

Feature Summary

• Octal configuration providing eight independent D-type flip-flops on a single chip
• Positive-edge clock triggering mechanism for precise data synchronization
• Asynchronous master reset input to clear all outputs independently of the clock signal
• High-speed CMOS technology enabling operation across a wide voltage range

Applications

• Parallel-to-serial data conversion circuits
• General-purpose register storage applications
• Data buffering in digital communication systems
• State machine implementation in control logic

Procurement Notes

Verify the specific suffix 'E' corresponds to the PDIP-20 through-hole package variant when sourcing. Confirm that the order includes the standard tape-and-reel or tube packaging options available for this series. Ensure compliance with RoHS directives and lead-free manufacturing requirements specified by Texas Instruments. Cross-reference the manufacturer part number against official distributor catalogs to avoid confusion with surface-mount variants like the M-series.

Selection Notes

Select the CD74HC273E when through-hole mounting is required for prototyping or industrial environments. Choose this model over surface-mount alternatives if mechanical stability during assembly is a priority. Consider the 2V to 6V operating range for compatibility with various logic families. Verify that the 150 ns propagation delay meets the timing constraints of the target application circuit.

Part Context

This component belongs to the Texas Instruments HC logic family, which utilizes high-speed CMOS technology. The HC series is designed for compatibility with standard TTL inputs while offering lower power consumption. The CD74HC273E specifically addresses the need for multi-bit storage in digital designs. It serves as a fundamental building block for sequential logic circuits requiring parallel data retention.

Replacement Considerations

CD74HC273ME4

FAQ

What is the trigger type of the CD74HC273E?

The device uses positive-edge triggering, meaning data is latched on the rising edge of the clock signal.

Does the CD74HC273E have an active-low or active-high reset?

The datasheet specifies an asynchronous master reset function. Standard HC logic typically employs an active-low reset, but verification of the specific schematic symbol in the official datasheet is recommended for polarity confirmation.