PCA9674APW,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
  • Internal power-on reset
  • Noise filter on SDA/SCL inputs
• Package: TSSOP (Thin Shrink Small Outline Package)
• Essence: The PCA9674APW,112 is a GPIO expander IC that provides additional general-purpose input/output (GPIO) pins to a microcontroller or other digital devices.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 2.3V to 5.5V
• I/O Voltage Range: 1.65V to VDD
• Maximum Output Current: ±25mA
• Operating Temperature Range: -40°C to +85°C
• I2C-bus Frequency: Up to 400kHz

Detailed Pin Configuration

The PCA9674APW,112 has a total of 16 pins in a TSSOP package. The pin configuration is as follows:

```

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| | | 1 16 | | | | 2 15 | | | | 3 14 | | | | 4 13 | | | | 5 12 | | | | 6 11 | | | | 7 10 | | | | 8 9 | |_______________| ```

Functional Features

• Bidirectional I/Os: The PCA9674APW,112 provides 8 bidirectional I/O pins that can be configured as inputs or outputs.
• I2C-bus Interface: It communicates with the microcontroller or other devices through the I2C-bus, allowing for easy integration into existing systems.
• Interrupt Output: The IC has an open-drain interrupt output that can be used to notify the microcontroller of any changes on the I/O pins.
• Power-On Reset: It includes an internal power-on reset circuit that ensures proper initialization upon power-up.
• Noise Filter: The SDA/SCL inputs have a noise filter to improve signal integrity in noisy environments.

Advantages and Disadvantages

Advantages: - Provides additional GPIO pins, expanding the capabilities of microcontrollers or digital devices. - Low-voltage operation allows compatibility with a wide range of systems. - I2C-bus interface simplifies integration and reduces the number of required I/O pins. - Internal power-on reset ensures reliable startup. - Noise filter improves signal quality in noisy environments.

Disadvantages: - Limited number of I/O pins (8 in total). - Requires I2C-bus communication protocol support from the microcontroller or host device.

Working Principles

The PCA9674APW,112 is controlled via the I2C-bus. The microcontroller sends commands and data to the IC, configuring the I/O pins as inputs or outputs. The state of the pins can be read back by the microcontroller. Changes on the pins can trigger an interrupt, which can be used to alert the microcontroller of events or status changes.

Detailed Application Field Plans

The PCA9674APW,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 - Sensor interfaces - Keypad scanning

Detailed and Complete Alternative Models

Some alternative models to the PCA9674APW,112 that offer similar functionality are: - MCP23017: 16-bit I/O expander with I2C-bus interface - PCF8574: 8-bit I/O expander with I2C-bus interface - MAX7313: 16-bit I/O expander with SPI interface

These alternative models can be considered based on specific requirements and system compatibility.

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