TCA9548A I2C 1-to-8 Channel Multiplexer Module

TCA9548A I2C 1-to-8 Channel Multiplexer Module

  • 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
SKU: 26473

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Description

TCA9548A I2C 1-to-8 Channel Multiplexer Module

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

PinDescription
VINPowers the multiplexer
GNDConnect to GND
SDAConnect to the master microcontroller SDA pin
SCLConnect to the master microcontroller SCL pin
RSTActive low RST pin—can be used to reset the multiplexer
A0Selects multiplexer I2C address—connect to GND or VCC
A1Selects multiplexer I2C address—connect to GND or VCC
A2Selects multiplexer I2C address—connect to GND or VCC
SD0SDA for channel 0
SC0SCL for channel 0
SD1SDA for channel 1
SC1SCL for channel 1
SD2SDA for channel 2
SC2SCL for channel 2
SD3SDA for channel 3
SC3SCL for channel 3
SD4SDA for channel 4
SC4SCL for channel 4
SD5SDA for channel 5
SC5SCL for channel 5
SD6SDA for channel 6
SC6SCL for channel 6
SD7SDA for channel 7
SC7SCL 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.

A0A1A2I2C Address
LOWLOWLOW0x70
HIGHLOWLOW0x71
LOWHIGHLOW0x72
HIGHHIGHLOW0x73
LOWLOWHIGH0x74
HIGHLOWHIGH0x75
LOWHIGHHIGH0x76
HIGHHIGHHIGH0x77

Package Includes:

  • 1x GY-BMP280 Module

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TCA9548A I2C 1-to-8 Channel Multiplexer Module

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