Overview
The PCF8574APWR, manufactured by Texas Instruments, is an 8-bit input/output (I/O) expander designed for use with the two-line bidirectional I2C bus. This device provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface, which includes serial clock (SCL) and serial data (SDA) lines. It operates within a voltage range of 2.5V to 6V VCC, making it versatile for various applications. The PCF8574APWR features an 8-bit quasi-bidirectional I/O port (P0–P7) with latched outputs, capable of driving LEDs directly due to its high-current drive capability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage (VCC) | 2.5 to 6 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Standby Current Consumption | 10 | μA |
| I/O Port Type | 8-bit quasi-bidirectional | |
| Output Drive Capability | High-current drive for LEDs | |
| Latch-up Performance | Exceeds 100 mA (JESD 78, Class II) | |
| Package Types | TSSOP (20 pins), SOIC (16 pins), PDIP (16 pins), TSSOP (20 pins), TVSOP (20 pins), VQFN (20 pins) | |
| Package Size (TSSOP) | 6.50 mm × 4.40 mm | mm |
Key Features
- Low standby-current consumption of 10 μA max
- I2C to parallel-port expander
- Open-drain interrupt output
- Compatible with most microcontrollers
- Latched outputs with high-current drive capability for directly driving LEDs
- Latch-up performance exceeds 100 mA Per JESD 78, Class II
Applications
- Telecom shelters: filter units
- Servers
- 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 PCF8574APWR?
The PCF8574APWR operates within a voltage range of 2.5V to 6V VCC.
- What type of I/O port does the PCF8574APWR feature?
The PCF8574APWR features an 8-bit quasi-bidirectional I/O port (P0–P7).
- What is the standby current consumption of the PCF8574APWR?
The standby current consumption is 10 μA max.
- Can the PCF8574APWR drive LEDs directly?
- What are the package types available for the PCF8574APWR?
The available package types include TSSOP (20 pins), SOIC (16 pins), PDIP (16 pins), TSSOP (20 pins), TVSOP (20 pins), and VQFN (20 pins).
- What is the operating temperature range of the PCF8574APWR?
The operating temperature range is -40°C to 85°C.
- Is the PCF8574APWR compatible with most microcontrollers?
- What is the latch-up performance of the PCF8574APWR?
The latch-up performance exceeds 100 mA Per JESD 78, Class II.
- Does the PCF8574APWR have an open-drain interrupt output?
- What are some common applications of the PCF8574APWR?
