Overview
The PCF8575CPW, produced 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 two-line bidirectional I2C bus. It features a 16-bit quasi-bidirectional I/O port, making it versatile for various applications requiring additional I/O capabilities.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| Supply Voltage Range | 2.5 | 5.5 | V |
| Input Voltage Range | -0.5 | VCC + 0.5 | V |
| Output Voltage Range | -0.5 | VCC + 0.5 | V |
| Continuous Output Low Current | 50 | mA | |
| Continuous Output High Current | -4 | mA | |
| Storage Temperature Range | -65 | 150 | °C |
| I2C Bus Frequency | 400 kHz | ||
| Standby Current Consumption | 10 μA |
Key Features
- I2C to parallel-port expander with a 16-bit quasi-bidirectional I/O port.
- Low standby current consumption of 10 μA maximum.
- 400 kHz FAST I2C bus compatibility.
- Open-drain interrupt output for notifying the microcontroller of incoming data.
- Latched outputs with high current drive capability for directly driving LEDs.
- Address by three hardware address pins, allowing up to eight devices to be used in any combination.
- Compatible with most microcontrollers.
Applications
- Expansion of I/O capabilities for microcontrollers in various embedded systems.
- Industrial control systems where additional I/O ports are required.
- Automotive systems for sensor and actuator control.
- Consumer electronics for adding more I/O functionality.
- Medical devices requiring remote I/O expansion.
Q & A
- What is the PCF8575CPW used for?
The PCF8575CPW is used for providing general-purpose remote I/O expansion for most microcontroller families via the I2C bus.
- What is the operating supply voltage range of the PCF8575CPW?
The operating supply voltage range is from 2.5 V to 5.5 V.
- What is the maximum standby current consumption of the PCF8575CPW?
The maximum standby current consumption is 10 μA.
- What is the maximum frequency of the I2C bus supported by the PCF8575CPW?
The maximum frequency of the I2C bus supported is 400 kHz.
- Can the PCF8575CPW drive LEDs directly?
Yes, the PCF8575CPW has latched outputs with high current drive capability for directly driving LEDs.
- How many devices can be addressed using the PCF8575CPW?
Up to eight devices can be addressed using the three hardware address pins.
- What type of interrupt output does the PCF8575CPW have?
The PCF8575CPW has an open-drain interrupt output.
- Is the PCF8575CPW compatible with most microcontrollers?
Yes, the PCF8575CPW is compatible with most microcontrollers.
- What is the storage temperature range for the PCF8575CPW?
The storage temperature range is from -65°C to 150°C.
- How does the PCF8575CPW handle data transmission?
The PCF8575CPW handles data transmission in pairs of bytes, with the first byte referring to P07-P00 and the second byte referring to P17-P10.
