Datasheet

On an Arduino, which is what we're using, we suggest running this handy scanner script
which will tell you what the breakout detected
/**
* TCA9548 I2CScanner.pde -- I2C bus scanner for Arduino
*
* Based on code c. 2009, Tod E. Kurt, http://todbot.com/blog/
*
*/
#include "Wire.h"
extern "C" {
#include "utility/twi.h" // from Wire library, so we can do bus scanning
}
#define TCAADDR 0x70
void tcaselect(uint8_t i) {
if (i > 7) return;
Wire.beginTransmission(TCAADDR);
© Adafruit Industries
https://learn.adafruit.com/adafruit-tca9548a-1-to-8-i2c-multiplexer-
breakout
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