PCF8574DWRG4

Product Overview

• Category: Integrated Circuit (IC)
• Use: I/O Expander
• Characteristics: 8-bit remote I/O expander for I2C-bus with interrupt
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: The PCF8574DWRG4 is a highly integrated I/O expander designed for use in various applications that require additional I/O lines. It provides an easy and efficient way to increase the number of I/O ports available to a microcontroller or other devices.
• Packaging/Quantity: The PCF8574DWRG4 is typically sold in reels of 2500 units.

Specifications

• Supply Voltage Range: 2.5V to 6V
• I/O Ports: 8
• I2C-bus Interface: Compatible with I2C-bus Fast-mode, Standard-mode, and SMBus protocols
• Interrupt Output: Active LOW open-drain interrupt output pin
• Operating Temperature Range: -40°C to +85°C
• Package Type: SOIC-16

Detailed Pin Configuration

The PCF8574DWRG4 has a total of 16 pins arranged as follows:

```

---

| | | 1 2 3 | | | | 4 5 6 | | | | 7 8 9 | | | | 10 11 12 | | | | 13 14 15 | |_____________| ```

Pin Description: 1. SDA: Serial Data Input/Output pin for I2C communication. 2. SCL: Serial Clock Input pin for I2C communication. 3. A0: Address Input bit 0. 4. A1: Address Input bit 1. 5. A2: Address Input bit 2. 6. P0-P7: I/O Ports 0 to 7. 7. INT: Interrupt Output pin.

Functional Features

• Bidirectional I/O Ports: The PCF8574DWRG4 provides 8 bidirectional I/O ports that can be individually configured as inputs or outputs.
• I2C-bus Interface: It supports the I2C-bus protocol, allowing easy communication with microcontrollers and other devices.
• Interrupt Functionality: The device features an interrupt output pin that can be used to notify the microcontroller of changes on any of the I/O ports.
• Low Power Consumption: The PCF8574DWRG4 is designed to operate with low power consumption, making it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages: - Easy Expansion: The PCF8574DWRG4 allows easy expansion of I/O ports without the need for complex wiring or additional microcontroller pins. - Simplified Design: It simplifies the design process by providing a compact and integrated solution for I/O expansion. - Cost-effective: The device offers cost-effective I/O expansion compared to alternative methods.

Disadvantages: - Limited I/O Ports: The PCF8574DWRG4 only provides 8 I/O ports, which may not be sufficient for applications requiring a large number of I/O lines. - Slower Communication: The I2C-bus interface used by the device operates at lower speeds compared to other communication protocols.

Working Principles

The PCF8574DWRG4 works by utilizing the I2C-bus protocol to communicate with the microcontroller or other devices. It acts as a bridge between the microcontroller and external devices, expanding the available I/O ports. The device can be addressed using the A0, A1, and A2 pins, allowing multiple PCF8574DWRG4 devices to be connected on the same I2C-bus.

Detailed Application Field Plans

The PCF8574DWRG4 finds applications in various fields, including:

1. Industrial Automation: It can be used to expand the number of I/O ports in industrial control systems, allowing for efficient interfacing with sensors, actuators, and other devices.
2. Home Automation: The device enables the control of multiple home automation devices through a microcontroller, such as controlling lights, appliances, and security systems.
3. Robotics: It can be utilized in robotics projects to increase the number of I/O lines available for controlling motors, sensors, and other peripherals.
4. IoT (Internet of Things): The PCF8574DWRG4 can be integrated into IoT devices to provide additional I/O ports for connecting sensors, actuators, and communication modules.

Detailed and Complete Alternative Models

• PCF8574APW: Similar to PCF8574DWRG4 but comes