The Grove I2C 4 Channel Mux Breakout Board is a TCA9545A based quad bidirectional I2C Expander and Multiplexor controlled via the I2C bus with GROVE connectors. The SCL/SDA controlling fans out to four downstream channels. It works for both the Arduino and Raspberry Pi.
New Version released: 0057-051618-01 - Removes Mandatory Jumpers for power to the four channels. Has soldered jumpers to connect channel power to VCC on the Computer Interface and J1 Grove Connector. You can cut the solder jumpers if you want different power supplies on the individual channels. See Specification.