PCF8575DBRE4

Product Overview

• Category: Integrated Circuit (IC)
• Use: I/O Expander
• Characteristics: 16-bit remote I/O expander for I2C-bus with interrupt
• Package: SSOP (Shrink Small Outline Package)
• Essence: The PCF8575DBRE4 is a versatile I/O expander that provides easy interfacing between microcontrollers and peripheral devices.
• Packaging/Quantity: Available in tape and reel packaging, with 2500 units per reel.

Specifications

The PCF8575DBRE4 has the following specifications:

• Supply Voltage Range: 2.3V to 5.5V
• Input/Output Voltage Range: 0V to VDD
• Maximum Output Current: 25mA per channel
• Maximum Total Current: 200mA
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Interface: Compatible with I2C-bus Fast-mode and Standard-mode

Detailed Pin Configuration

The PCF8575DBRE4 has a total of 24 pins, which are assigned as follows:

1. A0: Address input bit 0
2. A1: Address input bit 1
3. A2: Address input bit 2
4. SDA: Serial data input/output
5. SCL: Serial clock input
6. INT: Interrupt output
7. P7-P0: I/O port 7 to 0
8. GND: Ground
9. VDD: Supply voltage

Functional Features

• Remote I/O Expansion: The PCF8575DBRE4 allows for expanding the number of I/O ports available on a microcontroller by providing an additional 16-bit I/O port.
• Interrupt Functionality: The device supports an interrupt output pin (INT) that can be used to notify the microcontroller of changes in the input states.
• Low Power Consumption: The PCF8575DBRE4 is designed to operate with low power consumption, making it suitable for battery-powered applications.
• I2C-bus Compatibility: The device is compatible with the popular I2C-bus communication protocol, allowing for easy integration into existing systems.

Advantages and Disadvantages

Advantages: - Easy interfacing between microcontrollers and peripheral devices - Versatile and flexible I/O expansion capabilities - Interrupt functionality for efficient event handling - Low power consumption for energy-efficient designs - Compact SSOP package for space-constrained applications

Disadvantages: - Limited to 16-bit I/O expansion, may not be sufficient for complex systems requiring a larger number of I/O ports - Requires knowledge of I2C-bus protocol for proper integration

Working Principles

The PCF8575DBRE4 operates by communicating with a microcontroller through the I2C-bus interface. The microcontroller sends commands and data to the device, which then controls the I/O ports accordingly. Changes in the input states are detected by the device and can trigger an interrupt signal to the microcontroller if enabled. The PCF8575DBRE4 requires a supply voltage within the specified range to function properly.

Detailed Application Field Plans

The PCF8575DBRE4 finds applications in various fields, including:

1. Industrial Automation: Used for controlling and monitoring multiple sensors and actuators in industrial automation systems.
2. Home Automation: Enables the control of various home appliances and devices through a central microcontroller.
3. Automotive Electronics: Provides additional I/O ports for automotive control units, allowing for enhanced functionality and connectivity.
4. Internet of Things (IoT): Facilitates the integration of peripheral devices into IoT networks, enabling remote monitoring and control.

Detailed and Complete Alternative Models

1. MCP23017: 16-bit I/O expander with I2C-bus interface, interrupt functionality, and similar specifications.
2. MAX7313: 16-bit I/O port expander with serial interface, interrupt support, and extended temperature range.
3. PCA9555: 16-bit I/O expander with I2C-bus interface, interrupt output, and programmable polarity inversion.

These alternative models offer similar functionality to the PCF8575DBRE4 and can be considered as alternatives based on specific requirements and availability.

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