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Product details
The TCA9548A I2C multiplexer allows you to communicate with up to 8 I2C devices with the same I2C bus. The multiplexer communicates with a microcontroller using the I2C communication protocol. Then, you can select which I2C bus on the multiplexer you want to address.
To address a specific port, you just need to send a single byte to the multiplexer with the desired output port number.
Features:
- 1 to 8 bidirectional translating switches
- Active-low reset input
- Three address pins—up to 8 TCA9548A devices on the same I2C bus
- Channel selection through an I2C bus
- Operating power supply voltage range: 1.65V to 5.5V
- 5V tolerant pins
TCA9548A Pinout:
| Pin | Description |
| VIN | Powers the multiplexer |
| GND | Connect to GND |
| SDA | Connect to the master microcontroller SDA pin |
| SCL | Connect to the master microcontroller SCL pin |
| RST | Active low RST pin—can be used to reset the multiplexer |
| A0 | Selects multiplexer I2C address—connect to GND or VCC |
| A1 | Selects multiplexer I2C address—connect to GND or VCC |
| A2 | Selects multiplexer I2C address—connect to GND or VCC |
| SD0 | SDA for channel 0 |
| SC0 | SCL for channel 0 |
| SD1 | SDA for channel 1 |
| SC1 | SCL for channel 1 |
| SD2 | SDA for channel 2 |
| SC2 | SCL for channel 2 |
| SD3 | SDA for channel 3 |
| SC3 | SCL for channel 3 |
| SD4 | SDA for channel 4 |
| SC4 | SCL for channel 4 |
| SD5 | SDA for channel 5 |
| SC5 | SCL for channel 5 |
| SD6 | SDA for channel 6 |
| SC6 | SCL for channel 6 |
| SD7 | SDA for channel 7 |
| SC7 | SCL for channel 7 |
TCA9548A Multiplexer I2C Address:
The TCA9548A Multiplexer communicates with a microcontroller using the I2C communication protocol. So, it needs an I2C address. The address of the multiplexer is configurable. You can select a value from 0x70 to 0x77 by adjusting the values of the A0, A1, and A2 pins, as shown in the table below.
| A0 | A1 | A2 | I2C Address |
| LOW | LOW | LOW | 0x70 |
| HIGH | LOW | LOW | 0x71 |
| LOW | HIGH | LOW | 0x72 |
| HIGH | HIGH | LOW | 0x73 |
| LOW | LOW | HIGH | 0x74 |
| HIGH | LOW | HIGH | 0x75 |
| LOW | HIGH | HIGH | 0x76 |
| HIGH | HIGH | HIGH | 0x77 |
Tutorial: https://randomnerdtutorials.com/tca9548a-i2c-multiplexer-esp32-esp8266-arduino/
Datasheet: https://cdn-shop.adafruit.com/datasheets/tca9548a.pdf
Specifications
Key Features
Features:
- 1 to 8 bidirectional translating switches
- Active-low reset input
- Three address pins—up to 8 TCA9548A devices on the same I2C bus
- Channel selection through an I2C bus
- Operating power supply voltage range: 1.65V to 5.5V
- 5V tolerant pins
Specifications
- SKU: GE779EA871IR5NAFAMZ
- Model: PCA9548A
- Weight (kg): 0.1
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PCA9548A I2C 8-Channel Multiplexer Breakout Expansion Board
₦ 5,000
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