74LV164PW

Overview

The 74LV164PW is an integrated circuit (IC) designed as an 8-bit serial-in/parallel-out shift register, widely adopted in digital systems for efficient data handling. Its low-voltage operation (1.0V–5.5V) suits both consumer electronics and industrial applications, offering flexibility across power-sensitive designs. Manufactured in a TSSOP (Thin Shrink Small Outline Package), it ensures space-saving PCB integration. As a member of the 74LV series, this IC emphasizes low power consumption and compatibility with mixed-voltage environments. It is often selected for its robustness in noisy electrical environments, making it ideal for automation, display drivers, and communication modules.

Structure and Working Principle

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The 74LV164PW consists of eight edge-triggered flip-flops connected in series, with a single serial data input (DS) and clock input (CP). Data shifts through the register on each clock pulse’s rising edge, appearing in parallel at outputs Q0–Q7. A master reset (MR) pin clears all outputs to low when activated. Internally, CMOS technology enables its low-voltage operation and minimal power dissipation. The IC’s design includes buffered inputs and outputs to enhance signal integrity, critical for high-speed data transfer. Its operation is synchronized solely by the clock signal, simplifying timing control in complex circuits.

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Key Features

Low-voltage capability (down to 1.0V) allows integration into battery-operated devices like handheld gadgets and IoT sensors. The IC’s high noise immunity (per JEDEC standards) ensures reliable performance in industrial settings with electromagnetic interference. Power consumption is exceptionally low, typically under 10µA in standby mode, aligning with green electronics trends. The TSSOP-14 package offers a compact footprint (5mm x 4.4mm), suitable for high-density PCB layouts. Wide operating temperature ranges (−40°C to +125°C) further support automotive and outdoor applications.

Application Areas

Primary uses include LED matrix control, where parallel outputs drive multiple LEDs with minimal wiring. In serial communication modules, the IC converts serial data streams (e.g., from microcontrollers) into parallel signals for actuators or displays. Industrial automation systems leverage its reliability for sensor data aggregation and control signal distribution. Consumer electronics, such as remote controls and toys, benefit from its low-power profile. Additionally, it serves as a cost-effective solution for prototyping digital circuits in educational kits.

Maintenance and Precautions

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To prolong lifespan, avoid exposing the IC to voltages beyond 5.5V or reverse polarity. Static electricity can damage CMOS components; use grounded tools and anti-ESD packaging during handling. For thermal management, ensure adequate PCB ventilation if operating at high clock frequencies (>20MHz). Soldering should follow J-STD-020 guidelines to prevent package warping. Regularly inspect solder joints for cracks in vibration-prone environments.

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B2B Procurement Guide

Bulk purchases (reels of 2,500 units) typically reduce per-unit costs by 15–30%. Verify supplier certifications (e.g., ISO 9001) to guarantee authentic parts, as counterfeit ICs may lack voltage tolerances. Lead times vary; allocate 4–8 weeks for orders from OEMs like NXP or Toshiba. Sample kits (10–100 units) are advisable for testing compatibility. Consider logistics: TSSOP packages are sensitive to moisture; ensure vacuum-sealed delivery with desiccants.