PCA9674ATS,112

Basic Information Overview

• Category: Integrated Circuit (IC)
• Use: GPIO Expander
• Characteristics:
  • Low-voltage bidirectional I/Os
  • 8-bit remote I/O port for the I2C-bus
  • Open-drain interrupt output
  • Cascadable for up to 64 I/Os
• Package: TSSOP
• Essence: Expand the number of general-purpose input/output (GPIO) pins available in a microcontroller or other digital device.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 1.65V to 5.5V
• I/O Voltage Range: 1.8V to 5.5V
• Maximum Frequency: 400 kHz
• Operating Temperature Range: -40°C to +85°C

Detailed Pin Configuration

The PCA9674ATS,112 has a total of 20 pins. The pin configuration is as follows:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | SDA | Serial Data Input/Output | | 2 | SCL | Serial Clock Input | | 3-10 | P0-P7 | General Purpose I/O Pins | | 11 | INT | Interrupt Output | | 12 | A0 | Address Bit 0 | | 13 | A1 | Address Bit 1 | | 14 | A2 | Address Bit 2 | | 15 | VDD | Supply Voltage | | 16 | GND | Ground |

Functional Features

• Bidirectional I/Os: Allows both input and output functionality on each pin.
• Remote I/O Port: Provides an 8-bit I/O port that can be controlled via the I2C-bus.
• Open-Drain Interrupt Output: Generates an interrupt signal when a change is detected on any of the input pins.
• Cascadable: Multiple PCA9674ATS,112 devices can be cascaded to expand the number of I/Os available.

Advantages and Disadvantages

Advantages: - Allows for easy expansion of GPIO pins in microcontrollers or digital devices. - Low-voltage operation enables compatibility with a wide range of systems. - Cascadable feature provides flexibility in expanding I/Os.

Disadvantages: - Limited to 8-bit I/O port, may not be suitable for applications requiring a larger number of I/Os. - Requires I2C-bus communication protocol support in the host device.

Working Principles

The PCA9674ATS,112 operates as an I2C-bus slave device. It communicates with the host microcontroller or digital device through the I2C-bus interface. The host device sends commands and data to control the I/O pins of the PCA9674ATS,112. The bidirectional I/Os allow the device to function as both inputs and outputs. Changes on the input pins can trigger interrupts, which can be used to notify the host device of events.

Detailed Application Field Plans

The PCA9674ATS,112 can be used in various applications where additional GPIO pins are required. Some potential application fields include: - Industrial automation - Home automation - Internet of Things (IoT) devices - Robotics - Automotive electronics

Detailed and Complete Alternative Models

• PCA9670ATS,112: 4-bit I/O expander with similar features but fewer I/O pins.
• PCA9671ATS,112: 8-bit I/O expander with interrupt output and similar characteristics.
• PCA9673ATS,112: 16-bit I/O expander with cascading capability and low-voltage operation.

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