Overview
The PCF8575DW, produced by Texas Instruments, is a remote 16-bit I2C and SMBus I/O expander with an interrupt output. This device is designed to provide general-purpose remote I/O expansion for most microcontroller families via the two-line bidirectional I2C bus. It operates within a voltage range of 2.5V to 5.5V, making it versatile for various applications. The PCF8575DW features a 16-bit quasi-bidirectional input/output port, allowing for flexible configuration as either inputs or outputs without the need for a data-direction control signal.
Key Specifications
| Parameter | Description |
|---|---|
| Package Type | SOIC-24, SSOP-24, TSSOP-24, VQFN-24 |
| Supply Voltage (VCC) | 2.5V to 5.5V |
| Bus Frequency | Up to 400 kHz |
| Number of I/O Ports | 16-bit (P07-P00, P17-P10) |
| I/O Port Type | Quasi-bidirectional |
| Interrupt Output | Open-drain interrupt output |
| Standby Current Consumption | Maximum 10 μA |
| Address Inputs | A0, A1, A2 (for addressing multiple devices) |
| RoHS Compliance | Yes |
Key Features
- I2C to parallel-port expander with a 16-bit quasi-bidirectional I/O port.
- Open-drain interrupt output for notifying the microcontroller of changes in the I/O ports.
- Low standby-current consumption of maximum 10 μA.
- Latched outputs with high-current drive capability for directly driving LEDs.
- Flexible configuration of I/O ports as either inputs or outputs without a data-direction control signal.
- Support for I2C and SMBus protocols.
Applications
- Telecom shelters and 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 PCF8575DW used for?
The PCF8575DW is used as a remote 16-bit I2C and SMBus I/O expander to provide additional I/O ports for microcontrollers.
- What is the voltage range of the PCF8575DW?
The PCF8575DW operates within a voltage range of 2.5V to 5.5V.
- How many I/O ports does the PCF8575DW have?
The PCF8575DW has a 16-bit quasi-bidirectional I/O port, divided into two 8-bit ports (P07-P00 and P17-P10).
- What type of interrupt output does the PCF8575DW have?
The PCF8575DW features an open-drain interrupt output.
- What is the maximum standby current consumption of the PCF8575DW?
The maximum standby current consumption is 10 μA.
- Can the PCF8575DW drive LEDs directly?
- What protocols does the PCF8575DW support?
The PCF8575DW supports both I2C and SMBus protocols.
- How are the I/O ports configured on the PCF8575DW?
The I/O ports can be configured as either inputs or outputs without the need for a data-direction control signal.
- What are some common applications of the PCF8575DW?
Common applications include telecom shelters, servers, routers, personal computers, personal electronics, and industrial automation.
- Is the PCF8575DW RoHS compliant?
