Overview
The PCF8575CPWR, 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 within a voltage range of 2.5 to 5.5 volts and is known for its low standby current consumption of up to 10 μA. It features a quasi-bidirectional 16-bit I/O port, allowing each pin to be used as either an input or an output without the need for a data-direction control signal. The PCF8575CPWR is particularly useful in applications requiring additional I/O ports, such as in industrial control, consumer electronics, and automotive systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 2.5 to 5.5 | V |
| Standby Current Consumption | Up to 10 | μA |
| I2C Bus Frequency | Up to 400 kHz | |
| I/O Port Configuration | 16-bit quasi-bidirectional | |
| Addressing | Three hardware address pins for up to eight devices | |
| Output Drive Capability | High-current drive for directly driving LEDs | |
| ESD Protection | Exceeds JESD 22 | |
| Operating Temperature Range | –40 to 85 °C |
Key Features
- I2C to parallel-port expander with a 16-bit quasi-bidirectional I/O port.
- Low standby current consumption of up to 10 μA, making it energy-efficient.
- High-current drive capability for directly driving LEDs.
- ESD protection exceeding JESD 22 standards.
- Open-drain interrupt output.
- Three hardware address pins allowing up to eight devices to be connected on the same bus.
- Compatible with most microcontroller families via the I2C interface).
Applications
- Industrial control systems: For expanding I/O capabilities in industrial automation and control systems.
- Consumer electronics: In devices such as set-top boxes, DVD players, and other consumer electronics requiring additional I/O ports.
- Automotive systems: For use in automotive applications where additional I/O expansion is necessary.
- Medical devices: In medical equipment where low power consumption and reliable I/O expansion are critical.
Q & A
- What is the operating voltage range of the PCF8575CPWR?
The operating voltage range is from 2.5 to 5.5 volts.
- What is the maximum standby current consumption of the PCF8575CPWR?
The maximum standby current consumption is up to 10 μA.
- What is the maximum frequency of the I2C bus for the PCF8575CPWR?
The maximum frequency of the I2C bus is up to 400 kHz.
- How many devices can be connected on the same I2C bus using the PCF8575CPWR?
Up to eight devices can be connected using the three hardware address pins.
- What is the output drive capability of the PCF8575CPWR?
The device has high-current drive capability for directly driving LEDs.
- Does the PCF8575CPWR have ESD protection?
Yes, it exceeds JESD 22 ESD protection standards.
- What is the operating temperature range of the PCF8575CPWR?
The operating temperature range is from –40 to 85 °C.
- Can the PCF8575CPWR be used as both an input and an output without a data-direction control signal?
Yes, each quasi-bidirectional I/O can be used as either an input or an output without the need for a data-direction control signal.
- What type of interrupt output does the PCF8575CPWR have?
The device features an open-drain interrupt output.
- Is the PCF8575CPWR compatible with most microcontroller families?
Yes, it is compatible with most microcontroller families via the I2C interface.
