Overview
The PCF8575PWE4, manufactured by Texas Instruments, is a remote 16-bit I2C and SMBus I/O expander. This device is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface. It operates within a voltage range of 2.5V to 5.5V, making it versatile for various applications. The PCF8575 features a quasi-bidirectional input/output port, allowing for both input and output operations, and includes latched outputs with high-current drive capability, suitable for directly driving LEDs.
Key Specifications
| Specification | Value |
|---|---|
| Interface Type | I2C, SMBus |
| Number of I/Os | 16 |
| Supply Voltage - Min | 2.5 V |
| Supply Voltage - Max | 5.5 V |
| Maximum Clock Frequency | 400 kHz |
| Package Type | 24-TSSOP |
| Standby Current Consumption | 10 μA (maximum) |
| Interrupt Output | Open-drain |
Key Features
- I2C to parallel-port expander, allowing for communication over the I2C bus.
- Open-drain interrupt output, which can be connected to VCC through a pull-up resistor.
- Low standby-current consumption of 10 μA maximum, making it energy-efficient.
- Quasi-bidirectional input/output port (P07–P00, P17–P10) with latched outputs and high-current drive capability for directly driving LEDs.
- Address inputs (A0, A1, A2) allowing for multiple devices on the same bus.
Applications
- Telecom Shelters: Filter Units
- Servers and Routers (Telecom Switching Equipment)
- Personal Computers and Personal Electronics
- Industrial Automation
- Products with GPIO-Limited Processors.
Q & A
- What is the PCF8575PWE4 used for?
The PCF8575PWE4 is used as a remote 16-bit I2C and SMBus I/O expander to provide general-purpose remote I/O expansion for most microcontroller families.
- What is the operating voltage range of the PCF8575PWE4?
The operating voltage range is from 2.5V to 5.5V.
- What is the maximum clock frequency of the I2C interface on the PCF8575PWE4?
The maximum clock frequency is 400 kHz.
- What type of package does the PCF8575PWE4 come in?
The PCF8575PWE4 comes in a 24-TSSOP package.
- What is the standby current consumption of the PCF8575PWE4?
The standby current consumption is 10 μA maximum.
- Can the PCF8575PWE4 drive LEDs directly?
- How many address inputs does the PCF8575PWE4 have?
The PCF8575PWE4 has three address inputs (A0, A1, A2).
- What type of interrupt output does the PCF8575PWE4 have?
The PCF8575PWE4 has an open-drain interrupt output.
- In what applications is the PCF8575PWE4 commonly used?
The PCF8575PWE4 is commonly used in telecom shelters, servers, routers, personal computers, personal electronics, industrial automation, and products with GPIO-limited processors.
- How do you connect multiple PCF8575PWE4 devices on the same I2C bus?
You can connect multiple devices by using the address inputs (A0, A1, A2) to set unique addresses for each device.
