PCF8575DGVR

Overview

• Category: Integrated Circuit
• Use: I/O Expander
• Characteristics: 16-bit remote I/O expander for I2C-bus with interrupt
• Package: TSSOP-24
• Essence: The PCF8575DGVR is a 16-bit remote I/O expander for the I2C-bus. It provides general-purpose remote I/O expansion for most microcontroller families via the I2C-bus interface.
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 2.3V to 5.5V
• Input/Output Voltage Range: 0V to VDD
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Interface: Compatible with I2C-bus Fast-mode, Fast-mode Plus, and High-speed mode
• Interrupt Output: Active LOW open-drain interrupt output
• Standby Current Consumption: 10µA (typical)

Pin Configuration

The PCF8575DGVR has a TSSOP-24 package with the following pin configuration:

___________ | | 1 | A0 VDD | 24 2 | A1 SDA | 23 3 | A2 SCL | 22 4 | P7 INT | 21 5 | P6 P5 | 20 6 | P4 P3 | 19 7 | P2 P1 | 18 8 | P0 GND | 17 9 | NC P15 | 16 10 | NC P14 | 15 11 | NC P13 | 14 12 | NC P12 | 13 |___________|

Functional Features

• 16-bit remote I/O expander with a bi-directional I2C-bus interface
• Supports both input and output operations on each port individually
• Interrupt output for efficient communication with the microcontroller
• Low standby current consumption for power-sensitive applications
• Compatible with various microcontroller families

Advantages

• Provides additional I/O ports for microcontrollers with limited pins
• Simplifies I/O expansion by utilizing the I2C-bus interface
• Allows easy integration into existing systems with I2C-bus support
• Low power consumption makes it suitable for battery-powered devices

Disadvantages

• Requires I2C-bus support from the microcontroller
• Limited to 16 I/O ports, may not be sufficient for complex applications
• Slightly higher cost compared to traditional GPIO expanders

Working Principles

The PCF8575DGVR operates as a remote I/O expander by communicating with a microcontroller via the I2C-bus interface. It provides 16 bidirectional I/O ports that can be individually configured as inputs or outputs. The microcontroller can read or write data to these ports using I2C commands.

The device also features an interrupt output that can be used to notify the microcontroller of any changes in the input states. This allows for efficient communication between the PCF8575DGVR and the microcontroller, minimizing the need for continuous polling.

Application Field Plans

The PCF8575DGVR finds applications in various fields, including:

1. Industrial automation: Used for expanding I/O capabilities in control systems, PLCs, and industrial monitoring devices.
2. Home automation: Enables the control of multiple devices and sensors through a single microcontroller.
3. Internet of Things (IoT): Facilitates the connection of numerous sensors and actuators to IoT platforms.
4. Robotics: Provides additional I/O ports for controlling motors, sensors, and other peripherals in robotic systems.
5. Automotive electronics: Used for expanding I/O capabilities in automotive control units and infotainment systems.

Alternative Models

• MCP23017: 16-bit I/O expander with similar features and I2C-bus interface.
• MAX7313: 16-bit I/O expander with interrupt output and I2C-bus compatibility.
• PCA9538: 8-bit I/O expander with I2C-bus interface and interrupt support.

These alternative models offer similar functionality and can be considered as substitutes for the PCF8575DGVR depending on specific requirements.

In conclusion, the PCF8575DGVR is a versatile I/O expander that provides additional digital I/O ports for microcontrollers via the I2C-bus interface