← All parts
Pca9548 8 Channel Stemma Qt Qwiic I2C Multiplexer
Adafruit
The Adafruit PCA9548 8-Channel STEMMA QT Qwiic I2C Multiplexer allows connecting up to 8 same-address I2C devices by multiplexing them over a single I2C bus.
In stock
Specifications
3- I2c Address
- 0x70-0x77
- Voltage Range
- 3V - 5V
- I2c Clock Speed
- Not specified
Pinout
7| Pin | Name | Functions | Notes |
|---|---|---|---|
| V+ | Power | POWER | Connect this pin to the power supply of your microcontroller (5V for 5V boards, 3.3V or 5V for 3V boards). |
| GND | Ground | GND | Connect this pin to the ground of your microcontroller. |
| SCL | I2C Clock | I2C | Level shifted for 3-5V logic, connected to the I2C clock line of your microcontroller. There's a 10K pullup on this pin. |
| SDA | I2C Data | I2C | Level shifted for 3-5V logic, connected to the I2C data line of your microcontroller. There's a 10K pullup on this pin. |
| A0, A1, A2 | Address Jumpers | GPIO | These jumpers allow chaining up to 8 of these boards on the same I2C bus. Each jumper sets a bit in the address (A0: 1, A1: 2, A2: 4). |
| RST | Reset | GPIO | Pulled high by default. Connect to ground to reset the multiplexer. |
| STEMMA QT Ports 0-7 (SDA/SC0-SD7/SC7) | I2C Multiplexed | I2C | Each port is a separate I2C bus set. These are the pins that get multiplexed by the PCA9548. |
Interactive pinout
Highlight:
BOARD
Click a pin to copy its name · tap a tag above to spotlight a bus.