74LV273PW Octal D-Type Flip-Flop

Updated: 2026-09-25

Overview

The 74LV273PW is a CMOS-based octal D-type flip-flop integrated circuit, part of the 74LV series known for low-voltage operation. Manufactured by multiple semiconductor companies, it serves as a fundamental building block in digital electronics for temporary data storage and transfer. This IC contains eight edge-triggered D-type flip-flops with buffered outputs and a common asynchronous reset. The 3.3V operation makes it particularly valuable in modern low-power designs, bridging the gap between legacy 5V systems and contemporary battery-powered devices.

Structure and Working Principle

Internally, the 74LV273PW consists of eight independent D flip-flops sharing a clock (CP) and reset (MR) input. Data enters each flip-flop through individual D inputs (D0-D7) and appears at corresponding Q outputs (Q0-Q7) on the positive clock edge. The asynchronous master reset (active LOW) clears all outputs simultaneously, regardless of clock state. The buffered outputs provide adequate drive capability while maintaining signal integrity. Inputs are TTL-compatible, allowing direct interface with 5V logic when the device operates at 3.3V.

Key Features

Low-voltage operation (2.0V to 5.5V range) enables flexible power supply options while maintaining compatibility with 3.3V systems. The device offers typical propagation delay of 8ns at 3.3V, suitable for moderate-speed applications. High noise immunity characteristic of CMOS technology ensures reliable operation in electrically noisy environments. The 74LV273PW features balanced propagation delays and transition times, minimizing output skew in parallel data applications. Power consumption is exceptionally low, with typical ICC of 20μA in static conditions.

Application Areas

Common applications include microprocessor register interfaces, where it serves as an output latch for parallel ports. In digital signal processing systems, it functions as pipeline registers or temporary storage for intermediate calculations. Telecommunication equipment utilizes the 74LV273PW for synchronizing parallel data streams. Industrial control systems employ these flip-flops for state machine implementation and input synchronization. The device also finds use in consumer electronics like set-top boxes and networking equipment.

Maintenance and Precautions

Proper handling of the 74LV273PW requires ESD precautions during installation, using grounded workstations and wrist straps. Unused inputs should be tied to VCC or ground to prevent floating conditions that could increase power consumption. Designers must observe recommended decoupling practices, placing 0.1μF capacitors near the power pins. Thermal considerations are minimal due to low power dissipation, but adequate ventilation should be maintained in high-density PCB layouts. Avoid exceeding absolute maximum ratings, especially the 6V supply voltage limit.

B2B Procurement Guide

When sourcing 74LV273PW components, verify manufacturer authenticity through authorized distributors to avoid counterfeit parts. Consider environmental compliance requirements (RoHS, REACH) for end-product certifications. Volume pricing typically becomes competitive at quantities above 1,000 units, with some suppliers offering reel packaging (2,500 units per reel) for automated assembly. Lead times vary by manufacturer but generally range from 4-12 weeks for non-stock items. Evaluate alternative packaging options (e.g., SOIC) if TSSOP poses assembly challenges.