Overview
The PCF8574ADWG4 is an I/O expander integrated circuit (IC) manufactured by Texas Instruments. Designed to simplify I/O expansion for microcontrollers, this IC enables users to add additional I/O ports via the I²C bus. The PCF8574ADWG4 is widely used in applications requiring flexible and efficient I/O management, making it ideal for embedded systems, industrial automation, and consumer electronics. Its compact design, low power consumption, and ease of integration make it a competitive choice in the market.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 2.5 to 6 | V | Operating range |
| I²C Bus Frequency | Up to 400 | kHz | Standard and fast modes |
| Number of I/O Ports | 8 | - | Configurable as input or output |
| Operating Temperature | -40 to 85 | °C | Industrial range |
| Package | SOIC-24 | - | Wide-body package |
| Quiescent Current | 2.5 | µA | Low power consumption |
| Interrupt Output | Yes | - | Supports interrupt-driven operation |
| Latch-Up Performance | ±100 | mA | JESD 78, Class II |
Key Features
- 8-bit Remote I/O Expansion: Provides 8 additional I/O ports via the I²C bus, simplifying microcontroller designs.
- Low Power Consumption: Ideal for battery-powered applications with a quiescent current of only 2.5 µA.
- Interrupt Functionality: Supports interrupt-driven operation, reducing the need for continuous polling.
- Wide Operating Voltage: Operates from 2.5 V to 6 V, ensuring compatibility with various systems.
- Industrial Temperature Range: Suitable for harsh environments with an operating range of -40°C to 85°C.
Applications
The PCF8574ADWG4 is widely used in various fields, including:
- Industrial Automation: Enhances I/O capabilities for control systems and sensors.
- Consumer Electronics: Provides additional I/O ports for devices such as smart home appliances.
- Embedded Systems: Simplifies I/O expansion in microcontroller-based designs.
- Automotive Electronics: Supports robust operation in automotive control units.
Q & A
1. What is the purpose of the PCF8574ADWG4?
The PCF8574ADWG4 is an I/O expander IC that adds 8 additional I/O ports to a microcontroller via the I²C bus.
2. What is the operating voltage range?
It operates from 2.5 V to 6 V.
3. How many I/O ports does it provide?
It provides 8 configurable I/O ports.
4. Does it support interrupt functionality?
Yes, it supports interrupt-driven operation.
5. What is the maximum I²C bus frequency?
It supports up to 400 kHz in fast mode.
6. What is the package type?
It comes in an SOIC-24 wide-body package.
7. Is it suitable for industrial applications?
Yes, it operates in the industrial temperature range of -40°C to 85°C.
8. What is the quiescent current?
The quiescent current is 2.5 µA, making it suitable for low-power applications.
9. Can the I/O ports be configured as inputs and outputs?
Yes, the 8 I/O ports are configurable as either inputs or outputs.
10. Where can I find detailed documentation?
Detailed documentation is available on the Texas Instruments official website.
