Description CJMCU 9306 device is a dual bidirectional I2C and SMBus voltage level translator with an enable EN inputand is operational from 1 2 V to 3 3 V VREF1 and 1 8 V to 5 5 V VREF2 The PCA9306 device allows bidirectional voltage translations between 1 2 V and 5 V without the use of a direction pin The low ON state resistance RON of the switch allows connections to be made with minimal propagation delay When EN is high the translator switch is ON and the SCL1 and SDA1 I O are connected to the SCL2 and SDA2 I O respectively allowing bidirectional data flow between ports When EN is low the translator switch is off and a high impedance state exists between ports In addition to voltage translation the PCA9306 device can be used to isolate a 400 kHz bus from a 100 kHz busy controlling the EN pin and disconnecting the slower bus during fast mode communication Package included 1 x CJMCU 9306 PCA9306 2 Bit Bidirectional I2C Bus And SMBus Voltage Level Translator