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PCF8574DWR

Name: PCF8574DWR
Rating: 4.7 (12 reviews)

IC I/O EXPANDER I2C 8B 16SOIC

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包 SOIC (DW)-16
資料表 PCF8574DWR DataSheet
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規格

Package	Tape & Reel (TR),Cut Tape (CT),Bulk
ProductStatus	Active
NumberofI/O	8
Interface	I²C
InterruptOutput	Yes
Features	POR
OutputType	Push-Pull
Current-OutputSource/Sink	1mA, 25mA
ClockFrequency	100 kHz
Voltage-Supply	2.5V ~ 6V
OperatingTemperature	-40°C ~ 85°C
MountingType	Surface Mount
Package/Case	16-SOIC (0.295, 7.50mm Width)

概述

Description

The PCF8574DWR is an I²C-bus I/O port expander designed to increase the number of input/output pins available for microcontrollers. It features 8 bits of parallel input/output, allowing users to control multiple devices or read multiple inputs using just two wires (SDA and SCL) for communication. This chip operates at a supply voltage range of 2.5V to 6V, making it versatile for various applications.
The PCF8574DWR can be easily integrated into circuits, as it supports multiple devices on the same I²C bus using different addresses. It is commonly used in projects involving sensors, displays, and other peripherals that require additional GPIO (General Purpose Input/Output) capabilities.
Key features include interrupt-driven input capabilities, low power consumption, and the ability to drive LEDs or read button states. Overall, the PCF8574DWR is an efficient solution for expanding the functionality of microcontroller systems in embedded applications.

Features

The PCF8574DWR is an I2C bus I/O port expander that features:
1. 16-bit I/O Port: It provides 8 GPIO pins that can be configured as inputs or outputs, allowing for expansion of microcontroller I/O capabilities.
2. I2C Interface: Operates on the I2C bus, enabling communication with multiple devices using only two wires (SDA and SCL).
3. Multiple Device Support: Up to eight devices can be connected on the same I2C bus, addressing through hardware pins A0, A1, and A2.
4. Interrupt Feature: Supports an interrupt output pin (INT) to alert the microcontroller of input state changes.
5. Low Power Consumption: Operates at low power, making it suitable for battery-operated devices.
6. Wide Voltage Range: Accepts supply voltages from 2.5V to 6V, accommodating various application requirements.
7. Configurable Pins: Each pin can be individually configured for input or output, with pull-up resistors for input pins.
These features make the PCF8574DWR ideal for applications requiring additional I/O capabilities with minimal pin usage.

Package

The PCF8574DWR is packaged in a 16-pin TSSOP (Thin Shrink Small Outline Package) form factor. It is designed for efficient space utilization in compact electronic designs.

Pinout

The PCF8574DWR is an I2C I/O port expander that features a total of 16 pins. The pin configuration is as follows:
1. VCC (Pin 1): Supply voltage (2.5V to 6V).
2. GND (Pin 2): Ground reference.
3. SDA (Pin 3): Serial data line for I2C communication.
4. SCL (Pin 4): Serial clock line for I2C communication.
5. INT (Pin 5): Interrupt output; indicates a change in the state of the I/O pins.
6. P0 to P7 (Pins 6-13): Eight GPIO pins that can be configured as inputs or outputs.
7. A0, A1, A2 (Pins 14-16): Address selection pins, allowing up to eight devices to share the same I2C bus.
The device is commonly used to expand the number of digital I/O pins available to microcontrollers in applications such as sensor interfacing and control systems.

Manufacturer

The PCF8574DWR is manufactured by NXP Semiconductors, a global semiconductor company based in the Netherlands. NXP specializes in designing and producing a wide range of semiconductor products, including microcontrollers, processors, and various interface and connectivity solutions. The company primarily serves automotive, industrial, mobile, and Internet of Things (IoT) markets. NXP is known for its innovations in secure connectivity and processing solutions, making it a key player in the electronics industry.

Application

The PCF8574DWR is an I2C I/O expander used in various applications, including:
1. Microcontroller Interface: Expands GPIO pins for communication with sensors and actuators.
2. Keypad Input: Facilitates user input for devices like calculators or control panels.
3. LED Control: Manages multiple LEDs in designs such as displays and indicators.
4. Data Acquisition Systems: Collects signals from multiple sources in automation or monitoring applications.
5. Robotics: Enhances control over motors and sensors in robotic systems.

Equivalent

The PCF8574DWR is an I²C I/O expander. Equivalent products include the MCP23008, MCP23017, and TCA9555. These alternatives also provide GPIO expansion via I²C but may differ in the number of ports and features. Always check the specifications to ensure compatibility with your application.