Overview
The PCF8575PWR, produced by Texas Instruments, is a 16-bit I2C and SMBus I/O expander designed to provide general-purpose remote I/O expansion for most microcontroller families. This device operates on a 2.5-V to 5.5-V VCC and is compatible with the two-line bidirectional I2C bus. It features a 16-bit quasi-bidirectional input/output port, making it versatile for various applications requiring additional I/O capabilities.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Operating Voltage (VCC) | Range of supply voltage | 2.5 V to 5.5 V |
| Operating Temperature | Range of operating temperature | -40°C to 85°C |
| Package Type | Type of package | TSSOP (PW), SSOP, TVSOP, SOIC, TSSOP, VQFN |
| Pins | Number of pins in the package | 24 |
| I2C Bus Speed | Maximum speed of the I2C bus | 400 kHz |
| Standby Current | Maximum current consumption in standby mode | 10 μA |
| Address Pins | Number of hardware address pins | 3 |
| ESD Protection | Human-body model ESD protection | 2000 V |
Key Features
- I2C to parallel-port expander
- Open-drain interrupt output
- Low standby-current consumption of 10 μA maximum
- Compatible with most microcontrollers
- 400 kHz Fast I2C bus
- Address by three hardware address pins for use of up to eight devices
- Latched outputs with high-current drive capability for directly driving LEDs
- Current source to VCC for actively driving a high at the output
- Latch-up performance exceeds 100 mA Per JESD 78, class II
- ESD Protection exceeds JESD 22
Applications
- Telecom Shelters: Filter Units
- Servers
- Routers (Telecom Switching Equipment)
- Personal Computers
- Personal Electronics
- Industrial Automation
- Products with GPIO-Limited Processors
Q & A
- What is the operating voltage range of the PCF8575PWR?
The PCF8575PWR operates on a 2.5-V to 5.5-V VCC. - What is the maximum standby current consumption of the PCF8575PWR?
The maximum standby current consumption is 10 μA. - How many hardware address pins does the PCF8575PWR have?
The device has three hardware address pins, allowing up to eight devices to be used on the same bus. - What is the maximum speed of the I2C bus for the PCF8575PWR?
The maximum speed of the I2C bus is 400 kHz. - Can the PCF8575PWR drive LEDs directly?
Yes, the device features latched outputs with high-current drive capability for directly driving LEDs. - What type of ESD protection does the PCF8575PWR have?
The device has ESD protection exceeding 2000 V Human-body model, 200 V Machine model, and 1000 V Charged-device model. - How many pins does the TSSOP (PW) package of the PCF8575PWR have?
The TSSOP (PW) package has 24 pins. - What is the operating temperature range of the PCF8575PWR?
The operating temperature range is -40°C to 85°C. - Can the PCF8575PWR be used in industrial automation?
Yes, the device is suitable for use in industrial automation applications. - How does the interrupt output work on the PCF8575PWR?
The interrupt output (INT) is an open-drain output that can be connected to the interrupt logic of the microcontroller to signal changes in the I/O ports without continuous I2C communication.
