74VHC273M

Overview

The Fairchild Semiconductor 74VHC273M is an octal D-type flip-flop fabricated with silicon gate CMOS technology. It operates within a supply voltage range of 2 V to 5.5 V and supports a maximum frequency of 165 MHz at 5 V. The device features low power dissipation with a maximum quiescent current of 4 µA and provides power-down protection on all inputs. It offers high noise immunity, defined as 28% of VCC for both high and low levels, and maintains a maximum output noise voltage of 0.9 V. The component is pin-compatible with the 74HC273 series.

Feature Summary

• Advanced high-speed operation comparable to Bipolar Schottky TTL while maintaining CMOS low power dissipation
• Power-down protection provided on all inputs to prevent excessive current draw during standby
• High noise immunity with minimum thresholds set at 28% of the supply voltage
• Pin and function compatible with the standard 74HC273 logic family

Applications

• Octal data storage in digital systems
• Parallel-to-serial conversion circuits
• Timing and control logic applications requiring high-speed edge triggering

Procurement Notes

Verify the specific suffix against the manufacturer's current documentation to confirm package type and tape/reel specifications. Ensure the source document explicitly identifies the part as manufactured by Fairchild Semiconductor or its successor entity, ON Semiconductor, to avoid confusion with generic equivalents. Confirm RoHS compliance status if required for your assembly process.

Selection Notes

Select this component when an octal D-type flip-flop with high-speed performance is required alongside low static power consumption. It serves as a direct functional replacement for the 74HC273 in designs needing faster switching speeds. Consider the operating voltage range and noise immunity requirements to ensure compatibility with the surrounding logic levels in the circuit design.

Part Context

This component belongs to the VHC (Very High Speed CMOS) logic family, designed to bridge the performance gap between standard HC logic and bipolar technologies. The 74VHC273 specifically implements an octal configuration, providing eight independent D-type flip-flops with positive-edge triggering in a single integrated circuit package.

Replacement Considerations

The datasheet confirms pin and function compatibility with the 74HC273. Verify that the substitute device supports the required 165 MHz frequency and 5.5 V maximum supply voltage.