Overview
The PCF8575CDWR, 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 supply 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 through the I2C interface.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.5 to 5.5 | V |
| Operating Temperature Range | -40 to 85 | °C |
| I2C Bus Speed | 400 kHz | |
| Number of I/O Pins | 16 | |
| Package Type | 24-SOIC (0.295, 7.50mm Width) | |
| Standby Current Consumption | 10 μA (maximum) | |
| Continuous Output Low Current | 50 mA | |
| Continuous Output High Current | -4 mA | |
| ESD Protection | 2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model |
Key Features
- I2C to parallel-port expander with 400-kHz fast I2C bus speed
- Open-drain interrupt output
- Low standby-current consumption of 10 μA maximum
- Compatible with most microcontrollers
- 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 standards
Applications
- Telecom shelters: 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 supply voltage range of the PCF8575CDWR?
The supply voltage range is 2.5 to 5.5 volts. - What is the operating temperature range of the PCF8575CDWR?
The operating temperature range is -40 to 85°C. - What is the I2C bus speed of the PCF8575CDWR?
The I2C bus speed is 400 kHz. - How many I/O pins does the PCF8575CDWR have?
The device has 16 I/O pins. - What is the package type of the PCF8575CDWR?
The package type is 24-SOIC (0.295, 7.50mm Width). - What is the standby current consumption of the PCF8575CDWR?
The standby current consumption is 10 μA maximum. - Can the PCF8575CDWR drive LEDs directly?
Yes, it has latched outputs with high-current drive capability for directly driving LEDs. - What is the ESD protection level of the PCF8575CDWR?
The ESD protection exceeds JESD 22 standards (2000-V Human-Body Model, 200-V Machine Model, 1000-V Charged-Device Model). - How many devices can be addressed using the PCF8575CDWR?
Up to eight devices can be addressed using three hardware address pins. - What are some common applications of the PCF8575CDWR?
Common applications include telecom shelters, servers, routers, personal computers, personal electronics, industrial automation, and products with GPIO-limited processors.
