PCA9539D,112

Product Overview

• Category: Integrated Circuit
• Use: GPIO Expander
• Characteristics: I2C-bus controlled 16-bit I/O expander with interrupt and reset
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: Provides additional general-purpose input/output (GPIO) pins for microcontrollers or other devices
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.3 V to 5.5 V
• Number of I/Os: 16
• I/O Voltage Level: 1.8 V to 5.5 V
• I2C-bus Frequency: Up to 400 kHz
• Interrupt Output: Active-Low Open-Drain
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCA9539D,112 has a total of 24 pins. The pin configuration is as follows:

1. SDA - Serial Data Input/Output
2. SCL - Serial Clock Input
3. A0 - Address Input
4. A1 - Address Input
5. A2 - Address Input 6-21. P0-P15 - General Purpose Input/Output Pins
6. INT - Interrupt Output
7. RESET - Reset Input
8. GND - Ground

Functional Features

• 16 programmable GPIO pins
• I2C-bus interface for communication with the host microcontroller
• Interrupt output for efficient event-driven systems
• Reset input for device initialization
• Low standby current consumption
• Noise filter on SDA/SCL inputs for improved performance in noisy environments

Advantages and Disadvantages

Advantages: - Provides additional GPIO pins without using multiple microcontroller pins - Easy integration with existing I2C-bus systems - Interrupt feature allows for efficient event handling - Low power consumption in standby mode

Disadvantages: - Limited number of GPIO pins (16) - Requires I2C-bus communication protocol implementation

Working Principles

The PCA9539D,112 is an I2C-bus controlled GPIO expander. It communicates with the host microcontroller through the I2C-bus interface. The microcontroller can configure each GPIO pin as an input or output and read or write data to the corresponding pins. The interrupt output can be used to notify the microcontroller of specific events, reducing the need for continuous polling.

Detailed Application Field Plans

The PCA9539D,112 can be used in various applications that require additional GPIO pins. Some potential application fields include:

1. Industrial Automation: Control and monitoring of sensors, actuators, and other devices.
2. Home Automation: Integration with smart home systems for controlling lights, appliances, and security devices.
3. Automotive Electronics: Interface with vehicle systems for controlling lights, switches, and sensors.
4. Internet of Things (IoT): Expansion of GPIO capabilities in IoT devices for sensor data acquisition and actuator control.

Detailed and Complete Alternative Models

1. PCA9555PW,118 - 16-bit I/O expander with I2C-bus interface and interrupt output.
2. MCP23017-E/SP - 16-bit I/O expander with I2C-bus/SPI interface and interrupt output.
3. MAX7313ATE+ - 16-bit I/O expander with I2C-bus interface and interrupt output.

These alternative models provide similar functionality and can be considered based on specific requirements and compatibility with existing systems.

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