Overview
The PCF8575DWR is a 16-bit I/O expander designed by Texas Instruments for use with the two-line bidirectional bus (I2C). This device is optimized for operation within a voltage range of 2.5V to 5.5V VCC, making it versatile for various applications. It provides general-purpose remote I/O expansion for most microcontroller families through the I2C interface, which includes serial clock (SCL) and serial data (SDA) lines. The PCF8575DWR features a quasi-bidirectional input/output (I/O) port, allowing each I/O to be used as either an input or output without the need for a data-direction control signal.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Operating Voltage (VCC) | Range of operation | 2.5V to 5.5V |
| Operating Temperature Range | Temperature range for operation | -40°C to 85°C |
| Package Type | Type of packaging | SOIC (DW) - 24 pins |
| Standby Current Consumption | Maximum current in standby mode | 10µA |
| I2C Bus Speed | Speed of the I2C bus | 400kHz Fast I2C |
| Addressing | Number of hardware address pins | Three hardware address pins (A0, A1, A2) |
| Interrupt Output | Type of interrupt output | Open-drain interrupt output |
| ESD Protection | Human-body model ESD protection | 2000V |
Key Features
- I2C to parallel-port expander
- Open-drain interrupt output
- Low standby-current consumption of 10µA maximum
- Compatible with most microcontrollers
- 400kHz 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
- Latch-up performance exceeds 100mA Per JESD 78, class II
- ESD Protection exceeds JESD 22 standards
Applications
- Telecom Shelters: Filter Units
- Servers and 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 PCF8575DWR?
The PCF8575DWR operates within a voltage range of 2.5V to 5.5V VCC.
- What type of bus interface does the PCF8575DWR use?
The PCF8575DWR uses the I2C (Inter-Integrated Circuit) bus interface.
- How many hardware address pins does the PCF8575DWR have?
The PCF8575DWR has three hardware address pins (A0, A1, A2), allowing up to eight devices to be addressed.
- What is the maximum standby current consumption of the PCF8575DWR?
The maximum standby current consumption is 10µA.
- Can the PCF8575DWR drive LEDs directly?
- What is the ESD protection level of the PCF8575DWR?
- What are the typical applications of the PCF8575DWR?
- What is the operating temperature range of the PCF8575DWR?
- What type of packaging is available for the PCF8575DWR?
- Does the PCF8575DWR have interrupt output capability?
