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PCF8574 I/O Expander
PCF8574
Texas Instrumentsinterface io display
The PCF8574 is an 8-bit I/O expander that communicates via the I2C bus. It allows microcontrollers to increase their number of general-purpose input/output pins, with features like latched outputs for driving LEDs and an interrupt output.
In stock
Specifications
11- Operating Voltage
- 2.5 V
- Operating Voltage
- 6 V
- Logic Level
- 0.7 x VCC V
- Logic Level
- 0.3 x VCC V
- Interface
- I2C
- Standby Current Consumption
- 10 μA
- Operating Current
- 40 μA
- I2c Clock Frequency
- 100 kHz
- Temperature Range
- -40 °C
- Temperature Range
- 85 °C
- Package
- TVSOP, SOIC, PDIP, TSSOP, VQFN
Pinout
16| Pin | Name | Functions | Notes |
|---|---|---|---|
| 1 | VCC | POWER | |
| 2 | A0 | GPIO | Address input 0 |
| 3 | A1 | GPIO | Address input 1 |
| 4 | A2 | GPIO | Address input 2 |
| 5 | P3 | GPIO | I/O port 3 |
| 6 | P2 | GPIO | I/O port 2 |
| 7 | P1 | GPIO | I/O port 1 |
| 8 | P0 | GPIO | I/O port 0 |
| 9 | P7 | GPIO | I/O port 7 |
| 10 | P6 | GPIO | I/O port 6 |
| 11 | P5 | GPIO | I/O port 5 |
| 12 | P4 | GPIO | I/O port 4 |
| 13 | INT | GPIO | Interrupt output |
| 14 | SCL | I2C | Serial clock line |
| 15 | SDA | I2C | Serial data line |
| 16 | GND | GND |
Interactive pinout
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PCF8574
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