Overview
The PCF8575CDBQR, produced by Texas Instruments, is a remote 16-bit I2C and SMBus low-power I/O expander. This device is designed to provide general-purpose remote I/O expansion for most microcontroller families through the I2C interface. It operates within a supply voltage range of 2.5V to 5.5V and features a 16-bit quasi-bidirectional input/output (I/O) port, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 2.5 to 5.5 | V |
| Input Voltage Range | -0.5 to VCC + 0.5 | V |
| Output Voltage Range | -0.5 to VCC + 0.5 | V |
| Continuous Output Low Current | 50 | mA |
| Continuous Output High Current | -4 | mA |
| Storage Temperature Range | -65 to 150 | °C |
| I2C Bus Frequency | 400 kHz | |
| Package Type | 24-SSOP | |
| Operating Temperature Range | -40 to +85 | °C |
Key Features
- I2C to parallel-port expander with a 400 kHz fast I2C bus.
- 16-bit quasi-bidirectional input/output (I/O) port (P07–P00, P17–P10) with latched outputs and high-current drive capability for directly driving LEDs.
- Low standby-current consumption of 10 μA maximum.
- Open-drain interrupt output (INT) for informing the microcontroller of incoming data without using the I2C-bus.
- Address by three hardware address pins, allowing up to eight devices to be used in any combination.
- ESD protection exceeds JESD 22 standards.
- Latch-up performance exceeds 100 mA per JESD 78, Class II.
Applications
- Telecom shelters and filtering units.
- Servers and routers (telecom switching equipment).
- Personal computers and personal electronics.
- Industrial automation products.
- Products with GPIO-limited processors.
Q & A
- What is the PCF8575CDBQR used for?
The PCF8575CDBQR is used for providing general-purpose remote I/O expansion for most microcontroller families via the I2C interface. - What is the operating voltage range of the PCF8575CDBQR?
The operating voltage range is 2.5V to 5.5V. - How many I/O ports does the PCF8575CDBQR have?
The device features a 16-bit quasi-bidirectional input/output (I/O) port. - What is the maximum I2C bus frequency supported by the PCF8575CDBQR?
The maximum I2C bus frequency is 400 kHz. - What type of package does the PCF8575CDBQR come in?
The PCF8575CDBQR comes in a 24-SSOP package. - What is the standby-current consumption of the PCF8575CDBQR?
The standby-current consumption is 10 μA maximum. - Does the PCF8575CDBQR have ESD protection?
Yes, the device has ESD protection that exceeds JESD 22 standards. - How many devices can be used in combination with the PCF8575CDBQR?
Up to eight devices can be used in any combination due to the three hardware address pins. - What is the purpose of the interrupt output (INT) on the PCF8575CDBQR?
The interrupt output informs the microcontroller of incoming data without using the I2C-bus. - What are some common applications of the PCF8575CDBQR?
Common applications include telecom shelters, servers, routers, personal computers, personal electronics, and industrial automation products.
