Overview
The PCF8575CRGER is a 16-bit I/O expander produced by Texas Instruments, designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface. This device operates within a voltage range of 2.5V to 5.5V and is suitable for a wide range of applications requiring additional I/O ports. It features a quasi-bidirectional input/output port, allowing each I/O to function as either an input or output without the need for a data-direction control signal.
Key Specifications
| Specification | Value |
|---|---|
| Package | 24-pin VQFN (RGE) |
| Operating Temperature Range | -40°C to 85°C |
| VCC Operation Range | 2.5V to 5.5V |
| I2C Bus Speed | 400 kHz |
| Standby Current Consumption | 10 µA maximum |
| Addressing | Three hardware address pins for up to eight devices |
| ESD Protection | 2000V Human-body model, 200V Machine model, 1000V Charged-device model |
| Latch-Up Performance | Exceeds 100 mA Per JESD 78, Class II |
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
- ESD Protection exceeds JESD 22
Applications
The PCF8575CRGER is versatile and can be used in various applications, including:
- Expanding the I/O capabilities of microcontrollers in embedded systems
- Driving LEDs and other high-current devices directly
- Implementing interrupt-driven communication between the I/O expander and the microcontroller
- Enhancing the functionality of industrial control systems, alarm systems, and other automated devices
Q & A
- What is the primary function of the PCF8575CRGER?
The primary function of the PCF8575CRGER is to provide a 16-bit I/O expansion for microcontrollers via the I2C interface.
- What is the operating voltage range of the PCF8575CRGER?
The operating voltage range is 2.5V to 5.5V.
- What is the maximum standby current consumption of the PCF8575CRGER?
The maximum standby current consumption is 10 µA.
- How many devices can be addressed using the PCF8575CRGER?
Up to eight devices can be addressed using three hardware address pins.
- What is the speed of the I2C bus supported by the PCF8575CRGER?
The I2C bus speed is 400 kHz.
- Does the PCF8575CRGER have ESD protection?
- Can the PCF8575CRGER drive LEDs directly?
- How do the I/O ports of the PCF8575CRGER behave at power-on?
- What type of interrupt output does the PCF8575CRGER have?
- What is the latch-up performance of the PCF8575CRGER?
