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Pca9546 4 Channel Stemma Qt Multiplexer
Adafruit
The Adafruit PCA9546 4-Channel STEMMA QT Multiplexer is used to connect up to four I2C devices with the same address by multiplexing them over a single I2C bus.
In stock
Specifications
4- I2c Address
- 0x70-0x77
- Address Jumpers
- A0, A1, A2
- Reset Pin
- RST
- Vout Jumper
- V+ (3-5 VDC) or 3.3V 500mA
Pinout
5| Pin | Name | Functions | Notes |
|---|---|---|---|
| V+ | Power | POWER | Supply voltage for the board, should match the logic level of your microcontroller. |
| - | GND | GND | Common ground for power and logic. |
| SCL | I2C Clock | I2C | Level shifted to match 3-5V logic levels, with a 10K pullup resistor. |
| SDA | I2C Data | I2C | Level shifted to match 3-5V logic levels, with a 10K pullup resistor. |
| STEMMA QT Ports 0-3 (SDA/SCA) | I2C Multiplexed | I2C | Each port is an independent I2C bus. SDA and SCL pins are connected to the multiplexer. |
Interactive pinout
Highlight:
BOARD
Click a pin to copy its name · tap a tag above to spotlight a bus.