TCA6408PWG4

Product Overview

Category

TCA6408PWG4 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used as an input/output (I/O) expander for microcontrollers.

Characteristics

• TCA6408PWG4 is a low-voltage, 8-bit I/O expander with I2C interface.
• It provides additional general-purpose I/O pins for microcontrollers with limited I/O capabilities.
• The device operates at a voltage range of 1.65V to 5.5V, making it suitable for various applications.
• It offers high-speed I2C bus interface with speeds up to 400 kHz.
• TCA6408PWG4 has built-in ESD protection, ensuring robustness against electrostatic discharge.

Package and Quantity

The TCA6408PWG4 is available in a small-sized TSSOP-16 package. It is typically sold in reels or tubes containing multiple units.

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• Number of I/O Pins: 8
• I2C Bus Interface Speed: Up to 400 kHz
• Operating Temperature Range: -40°C to +85°C
• Package Type: TSSOP-16

Detailed Pin Configuration

The TCA6408PWG4 has a total of 16 pins, which are assigned as follows:

| Pin Number | Pin Name | Function | |------------|----------|----------| | 1 | VCC | Power Supply Voltage | | 2 | GND | Ground | | 3 | SDA | I2C Serial Data | | 4 | SCL | I2C Serial Clock | | 5-12 | P0-P7 | General Purpose I/O Pins | | 13 | INT | Interrupt Output | | 14-16 | NC | No Connection |

Functional Features

• TCA6408PWG4 provides bidirectional I/O expansion for microcontrollers.
• It supports both input and output modes for each I/O pin.
• The device has programmable polarity inversion, allowing flexibility in signal interpretation.
• It offers interrupt capability to notify the microcontroller of changes on selected pins.
• TCA6408PWG4 has a low standby current, making it suitable for power-sensitive applications.

Advantages and Disadvantages

Advantages

• Provides additional I/O pins for microcontrollers with limited I/O capabilities.
• Supports a wide range of supply voltages, enhancing compatibility.
• Offers high-speed I2C bus interface for efficient data transfer.
• Built-in ESD protection ensures reliability in harsh environments.

Disadvantages

• Limited number of I/O pins (8) may not be sufficient for complex applications requiring extensive I/O.

Working Principles

TCA6408PWG4 operates by communicating with a microcontroller through the I2C bus. The microcontroller sends commands and data to configure the I/O pins as inputs or outputs. It can also set the polarity inversion and enable interrupts if required. The device then responds accordingly, allowing the microcontroller to read or write data to the specified I/O pins.

Detailed Application Field Plans

The TCA6408PWG4 is widely used in various applications, including but not limited to: 1. Industrial automation systems: Provides additional I/O for controlling sensors, actuators, and other devices. 2. Consumer electronics: Enables expansion of I/O capabilities in devices such as smart home controllers, gaming consoles, and audio equipment. 3. Automotive electronics: Used for I/O expansion in automotive control modules, infotainment systems, and lighting controls. 4. Internet of Things (IoT) devices: Facilitates I/O expansion in IoT nodes, allowing connectivity with various sensors and actuators.

Detailed and Complete Alternative Models

1. MCP23008: Similar 8-bit I/O expander with I2C interface, offered by Microchip Technology Inc.
2. PCF8574: 8-bit I/O expander with I2C interface, available from Texas Instruments.
3. MAX7313: 16-bit I/O expander with I2C interface, manufactured by Maxim Integrated.

These alternative models offer similar functionality to the TCA6408PWG4 and can be considered as alternatives based on specific requirements.

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