PHS74HC4051

series introduction

# PHS74HC4051 Product Series Introduction

## 1. Overview
The PHS74HC4051 is a highly versatile and widely - used integrated circuit belonging to the 74HC series. It is an 8 - channel analog multiplexer/demultiplexer, designed to provide efficient signal routing and selection capabilities in a variety of electronic systems. This product series combines the advantages of high - speed CMOS technology with excellent analog performance, making it suitable for a broad range of applications in both digital and analog circuits.

## 2. Key Features

### 2.1 High - Speed Operation
Based on high - speed CMOS technology, the PHS74HC4051 offers fast switching times. This allows for rapid signal selection and routing, which is crucial in applications where real - time data processing or high - frequency signal handling is required. The high - speed operation ensures that the device can keep up with the demands of modern electronic systems, minimizing signal delays and improving overall system performance.

### 2.2 Wide Supply Voltage Range
The product series can operate over a relatively wide supply voltage range, typically from 2V to 6V. This flexibility makes it compatible with a variety of power sources and different electronic systems. Whether it is a low - voltage battery - powered device or a standard 5V logic circuit, the PHS74HC4051 can be easily integrated, providing designers with more options in system design.

### 2.3 Low Power Consumption
CMOS technology also endows the PHS74HC4051 with low power consumption characteristics. In today's energy - conscious world, this is a significant advantage, especially for portable devices and battery - operated systems. The low power consumption helps to extend the battery life of the device and reduces the overall power requirements of the system, making it more energy - efficient.

### 2.4 High - Impedance Off - State
When a particular channel is not selected, the corresponding output or input of the PHS74HC4051 presents a high - impedance state. This high - impedance off - state minimizes the loading effect on the signal sources, ensuring that the integrity of the unselected signals is maintained. It also helps to reduce cross - talk between different channels, improving the overall signal quality in multi - channel systems.

### 2.5 ESD Protection
The PHS74HC4051 is equipped with electrostatic discharge (ESD) protection on all pins. This protection feature safeguards the device from damage caused by electrostatic discharges, which are common in many electronic environments. ESD protection enhances the reliability and durability of the product, reducing the risk of device failure due to electrostatic events during handling, installation, or normal operation.

## 3. Pin Configuration and Functionality

### 3.1 Pinout
The PHS74HC4051 typically comes in a standard 16 - pin package. The pins are divided into several categories:
- **Channel Inputs/Outputs**: There are 8 pins (usually labeled as IN/OUT 0 - IN/OUT 7) that serve as the input or output ports for the 8 channels. Depending on whether the device is used as a multiplexer or a demultiplexer, these pins can either receive input signals or transmit output signals.
- **Address Pins**: Three address pins (A, B, C) are used to select one of the 8 channels. By applying different binary combinations of logic levels to these address pins, the user can choose which of the 8 channels is connected to the common terminal.
- **Common Terminal**: There is a single common terminal (usually labeled as COM) that is connected to the selected channel. In multiplexer mode, the signal from the selected input channel is routed to the common

Datasheets

• PDF 1
• PDF 2

Partlist