Overview
The PCF8575DBQRG4, produced by Texas Instruments, is a 16-bit I2C and SMBus I/O expander designed for remote I/O expansion in various microcontroller-based systems. This device operates over a voltage range of 2.5V to 5.5V and is suitable for a wide range of applications requiring additional I/O ports. The PCF8575 features a quasi-bidirectional I/O port, allowing each pin to be used as either an input or output without the need for a data-direction control signal. At power-on, all I/Os are set high, and only a current source to VCC is active.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage (VCC) | 2.5 to 5.5 | V |
| Operating Temperature Range | -40 to 85 | °C |
| I2C Bus Frequency | Up to 400 kHz | Hz |
| Number of I/O Pins | 16 | - |
| Package Types | SSOP, QSOP, TVSOP, SOIC, TSSOP, VQFN | - |
| Standby Current Consumption | 10 μA (maximum) | A |
| Address Inputs | 3 (A0, A1, A2) | - |
| Interrupt Output | Open-drain | - |
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
- Latch-up performance exceeds 100 mA per JESD 78, class II
- ESD Protection exceeds JESD 22 (2000V Human-body model, 200V Machine model, 1000V Charged-device model)
Applications
The PCF8575DBQRG4 is versatile and can be used in a variety of applications, including:
- Remote I/O expansion for microcontrollers
- LED drivers and display systems
- Industrial control systems
- Automotive systems
- Consumer electronics requiring additional I/O ports
Q & A
- What is the operating voltage range of the PCF8575DBQRG4?
The operating voltage range is 2.5V to 5.5V. - What is the maximum standby current consumption of the PCF8575DBQRG4?
The maximum standby current consumption is 10 μA. - How many I/O pins does the PCF8575DBQRG4 have?
The device has 16 I/O pins. - What is the maximum frequency of the I2C bus for the PCF8575DBQRG4?
The maximum frequency is up to 400 kHz. - Can the PCF8575DBQRG4 be used to drive LEDs directly?
Yes, it has latched outputs with high-current drive capability for directly driving LEDs. - What types of packages are available for the PCF8575DBQRG4?
The device is available in SSOP, QSOP, TVSOP, SOIC, TSSOP, and VQFN packages. - How many devices can be addressed using the hardware address pins?
Up to eight devices can be addressed using the three hardware address pins. - What kind of interrupt output does the PCF8575DBQRG4 have?
The device has an open-drain interrupt output. - What is the operating temperature range of the PCF8575DBQRG4?
The operating temperature range is -40°C to 85°C. - Does the PCF8575DBQRG4 have ESD protection?
Yes, it has ESD protection exceeding JESD 22 standards.
