PCA8574AN,112

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: I/O Expander
• Characteristics: 8-bit remote I/O expander for I2C-bus with interrupt
• Package: SO16 (Small Outline 16-pin package)
• Essence: The PCA8574AN,112 is a versatile I/O expander that allows users to increase the number of input/output pins on a microcontroller or other devices using the I2C communication protocol.
• Packaging/Quantity: Available in tape and reel packaging, with a quantity of 2500 units per reel.

Specifications

• Supply Voltage: 2.3V to 5.5V
• Input/Output Voltage: 0V to VDD
• Maximum Output Current: 25mA per channel
• I2C Bus Frequency: Up to 400kHz
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCA8574AN,112 has a total of 16 pins, which are assigned as follows:

1. P0: I/O Port 0
2. P1: I/O Port 1
3. P2: I/O Port 2
4. P3: I/O Port 3
5. P4: I/O Port 4
6. P5: I/O Port 5
7. P6: I/O Port 6
8. P7: I/O Port 7
9. INT: Interrupt Output
10. SDA: Serial Data Line (I2C)
11. SCL: Serial Clock Line (I2C)
12. A0: Address Bit 0
13. A1: Address Bit 1
14. A2: Address Bit 2
15. GND: Ground
16. VDD: Supply Voltage

Functional Features

• I2C-bus interface allows easy communication with microcontrollers and other devices.
• 8-bit bidirectional I/O ports can be individually configured as inputs or outputs.
• Interrupt output pin (INT) provides a signal to the microcontroller when any input changes state.
• Internal power-on reset ensures reliable operation upon power-up.
• Low standby current consumption, making it suitable for battery-powered applications.

Advantages and Disadvantages

Advantages: - Simple and efficient way to expand the number of I/O pins on a microcontroller. - Easy integration into existing I2C-based systems. - Interrupt feature allows for efficient event-driven programming. - Wide operating voltage range enables compatibility with various power sources.

Disadvantages: - Limited number of I/O pins (8 in total). - Requires I2C bus communication, which may add complexity to the system design. - Not suitable for high-speed applications due to the limited I2C bus frequency.

Working Principles

The PCA8574AN,112 operates as an I/O expander by utilizing the I2C-bus protocol. It communicates with a microcontroller or other devices through the SDA (Serial Data Line) and SCL (Serial Clock Line) pins. The device acts as a slave on the I2C bus and can be addressed using the A0, A1, and A2 address pins.

By configuring the individual I/O ports as inputs or outputs, the PCA8574AN,112 allows the microcontroller to read or write digital signals from/to external devices. The interrupt output pin (INT) can be used to notify the microcontroller when any of the input states change, enabling efficient event-driven programming.

Detailed Application Field Plans

The PCA8574AN,112 finds applications in various fields, including but not limited to: - Home automation systems - Industrial control systems - Automotive electronics - IoT (Internet of Things) devices - Robotics - Sensor interfaces

Detailed and Complete Alternative Models

Some alternative models to the PCA8574AN,112 include: - MCP23017: 16-bit I/O expander with I2C interface - PCF8574: 8-bit I/O expander with I2C interface - MAX7313: 16-bit I/O expander with SPI interface - SX1509: 16-channel I/O expander with I2C interface

These alternative models offer similar functionality and can be used as replacements depending on specific requirements.

In conclusion, the PCA8574AN,112 is a versatile I/O expander that provides an easy way to increase the number of input/output pins in a system. With its I2C-bus interface, interrupt feature, and low power consumption, it is suitable for various applications in different fields.