PCA9674PW,118

Product Overview

Category

PCA9674PW,118 belongs to the category of integrated circuits (ICs).

Use

The PCA9674PW,118 is commonly used as an I/O expander for microcontrollers. It provides additional input/output ports, allowing the microcontroller to interface with a larger number of devices.

Characteristics

• I2C-bus controlled 8-bit I/O expander
• Low standby current consumption
• Schmitt-trigger action on all inputs
• Open-drain interrupt output
• 5 V tolerant inputs
• 25 mA sink capability on all I/O pins
• ESD protection exceeds 2000 V HBM per JESD22-A114 and 1000 V CDM per JESD22-C101

Package

The PCA9674PW,118 is available in a TSSOP package.

Essence

The essence of PCA9674PW,118 lies in its ability to expand the input/output capabilities of microcontrollers, enabling them to connect with a larger number of external devices.

Packaging/Quantity

The PCA9674PW,118 is typically packaged in reels, with each reel containing a specific quantity of ICs. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

• Supply voltage: 2.3 V to 5.5 V
• Operating temperature range: -40°C to +85°C
• I/O voltage level: 1.8 V to 5.5 V
• Maximum I/O current: 25 mA
• Number of I/O pins: 8

Detailed Pin Configuration

The PCA9674PW,118 features a total of 20 pins, which are configured as follows:

• Pin 1: SDA (Serial Data)
• Pin 2: SCL (Serial Clock)
• Pin 3: INT (Interrupt Output)
• Pins 4-11: I/O0-I/O7 (Input/Output Pins)
• Pins 12-20: GND (Ground) and VCC (Supply Voltage)

Functional Features

1. I2C-Bus Control: The PCA9674PW,118 is controlled via the I2C-bus interface, allowing for easy integration with microcontrollers.
2. Schmitt-Trigger Action: All inputs of the PCA9674PW,118 feature Schmitt-trigger action, ensuring reliable signal detection even in the presence of noise.
3. Open-Drain Interrupt Output: The interrupt output pin operates in an open-drain configuration, providing flexibility in connecting external devices.
4. 5 V Tolerant Inputs: The PCA9674PW,118 supports 5 V tolerant inputs, enabling compatibility with a wide range of devices.
5. High Sink Capability: Each I/O pin of the PCA9674PW,118 can sink up to 25 mA, allowing it to drive various loads.
6. ESD Protection: The device offers robust electrostatic discharge (ESD) protection, exceeding industry standards.

Advantages and Disadvantages

Advantages

• Provides additional I/O ports for microcontrollers
• Low standby current consumption
• Schmitt-trigger action ensures reliable signal detection
• Open-drain interrupt output allows for flexible device connectivity
• 5 V tolerant inputs enable compatibility with different devices
• High sink capability for driving various loads
• Robust ESD protection

Disadvantages

• Limited number of I/O pins (8 in total)

Working Principles

The PCA9674PW,118 functions as an I/O expander by communicating with a microcontroller through the I2C-bus interface. It receives commands from the microcontroller and controls the state of its I/O pins accordingly. The microcontroller can read the input states and set the output states of the PCA9674PW,118, expanding its overall I/O capabilities.

Detailed Application Field Plans

The PCA9674PW,118 finds applications in various fields where additional I/O ports are required. Some potential application areas include:

1. Home Automation: Controlling and monitoring multiple devices such as lights, sensors, and actuators.
2. Industrial Automation: Expanding the I/O capabilities of programmable logic controllers (PLCs) for interfacing with sensors, switches, and other industrial equipment.
3. Robotics: Enabling communication between microcontrollers and various robotic components, such as motors, sensors, and displays.
4. Internet of Things (IoT): Integrating the PCA9674PW,118 into IoT devices to connect and control multiple peripherals.
5. Automotive Electronics: Enhancing the I/O capabilities of automotive control units for interfacing with sensors, switches, and actuators.

Detailed and Complete Alternative Models

1. MCP23017: An I/O expander with similar features, including I2C-bus control, 16 I/O pins, and interrupt