← All parts
PCA9548A I2C Multiplexer
PCA9548A
Texas Instrumentsinterface io display
PCA9548A is an I2C multiplexer with eight bidirectional switches, allowing selection of up to eight downstream channels via the I2C bus.
In stock
Specifications
8- Operating Voltage
- 2.3 V to 5.5 V
- Supply Current
- 50 μA to 80 μA (standard mode) (@ 400 kHz, VCC = 3.6 V, TA = 25°C)
- Interface
- I2C
- Resolution
- Not applicable
- Range
- 0 kHz to 400 kHz (SCL clock frequency) (@ VCC = 3.6 V, TA = 25°C)
- Accuracy
- Not applicable
- Temperature Range
- -40°C to 85°C (operating temperature range)
- Package
- SSOP, TVSOP, SOIC, TSSOP, VQFN (24 pins)
Pinout
24| Pin | Name | Functions | Notes |
|---|---|---|---|
| 1 | A0 | GPIO | Address input 0. Connect directly to VCC or ground. |
| 2 | A1 | GPIO | Address input 1. Connect directly to VCC or ground. |
| 3 | RESET | GPIO | Active-low reset input. Connect to VCC through a pull-up resistor, if not used. |
| 4 | SD0 | I2C | Serial data 0. Connect to VCC through a pull-up resistor. |
| 5 | SC0 | I2C | Serial clock 0. Connect to VCC through a pull-up resistor. |
| 6 | SD1 | I2C | Serial data 1. Connect to VCC through a pull-up resistor. |
| 7 | SC1 | I2C | Serial clock 1. Connect to VCC through a pull-up resistor. |
| 8 | SD2 | I2C | Serial data 2. Connect to VCC through a pull-up resistor. |
| 9 | SC2 | I2C | Serial clock 2. Connect to VCC through a pull-up resistor. |
| 10 | SD3 | I2C | Serial data 3. Connect to VCC through a pull-up resistor. |
| 11 | SC3 | I2C | Serial clock 3. Connect to VCC through a pull-up resistor. |
| 12 | GND | GND | Ground |
| 13 | SD4 | I2C | Serial data 4. Connect to VCC through a pull-up resistor. |
| 14 | SC4 | I2C | Serial clock 4. Connect to VCC through a pull-up resistor. |
| 15 | SD5 | I2C | Serial data 5. Connect to VCC through a pull-up resistor. |
| 16 | SC5 | I2C | Serial clock 5. Connect to VCC through a pull-up resistor. |
| 17 | SD6 | I2C | Serial data 6. Connect to VCC through a pull-up resistor. |
| 18 | SC6 | I2C | Serial clock 6. Connect to VCC through a pull-up resistor. |
| 19 | SD7 | I2C | Serial data 7. Connect to VCC through a pull-up resistor. |
| 20 | SC7 | I2C | Serial clock 7. Connect to VCC through a pull-up resistor. |
| 21 | A2 | GPIO | Address input 2. Connect directly to VCC or ground. |
| 22 | SCL | I2C | Serial clock bus. Connect to VCC through a pull-up resistor. |
| 23 | SDA | I2C | Serial data bus. Connect to VCC through a pull-up resistor. |
| 24 | VCC | POWER | Supply voltage |
Interactive pinout
Highlight:
PCA9548A
Click a pin to copy its name · tap a tag above to spotlight a bus.