The PCA9306 device is a dual bidirectional I2C and SMBus
voltage-level translator with an enable (EN) input, and 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 busby controlling the EN pin, and disconnecting
the slower bus during fast-mode communication.
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