Overview
The PCF8575CDGVR, 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 features a quasi-bidirectional 16-bit input/output port. It is particularly useful for expanding the I/O capabilities of microcontrollers via the I2C interface.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage Range | 2.5 to 5.5 | V |
| I2C Bus Speed | 400 kHz | |
| Number of I/O Ports | 16 | |
| Interrupt Output | Open-Drain | |
| Standby Current Consumption | 10 μA (max) | |
| Addressing Capability | Up to 8 devices using 3 hardware address pins | |
| Latched Outputs | High-current drive capability for directly driving LEDs | |
| ESD Protection | Exceeds JESD 22 - 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
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
- Addressing by three hardware address pins for 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 standards
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 PCF8575CDGVR?
The operating voltage range is 2.5 to 5.5 volts. - What is the speed of the I2C bus on the PCF8575CDGVR?
The I2C bus speed is 400 kHz. - How many I/O ports does the PCF8575CDGVR have?
The device has 16 quasi-bidirectional I/O ports. - What type of interrupt output does the PCF8575CDGVR provide?
The device provides an open-drain interrupt output. - What is the maximum standby current consumption of the PCF8575CDGVR?
The maximum standby current consumption is 10 μA. - How many devices can be addressed using the PCF8575CDGVR?
Up to eight devices can be addressed using three hardware address pins. - Can the PCF8575CDGVR drive LEDs directly?
Yes, the device has latched outputs with high-current drive capability for directly driving LEDs. - What level of ESD protection does the PCF8575CDGVR offer?
The device exceeds JESD 22 standards for ESD protection. - How do you configure the I/O ports on the PCF8575CDGVR?
The I/O ports can be configured as inputs or outputs without the use of a data-direction control signal. Configuration is done via the write mode. - What happens to the I/O ports at power-on?
At power-on, all I/O ports are set to logic high and can be used as inputs.
