PCA9306GM,125
Overview
The PCA9306GM,125 is a dual bidirectional I2C-bus and SMBus voltage-level translator that operates without a direction pin. It enables seamless communication between devices operating at different logic levels, ranging from 1.0V to 3.3V on the low side and up to 5.5V on the high side. The device features a low 3.5 Ohm ON-state connection that minimizes signal distortion during data transmission.
Why Choose This Part
This translator features a flow-through pinout that simplifies PCB routing and reduces board space requirements. It supports Fast-mode Plus (Fm+) speeds and provides high-impedance states when disabled (EN = LOW), preventing bus contention. Additionally, the passive-switch architecture eliminates the need for direction-control pins, making it a drop-in solution for standard I2C topologies.
Applications
Getting Started
To implement the PCA9306, connect the lower voltage bus to the SDA1/SCL1 pins and the higher voltage bus to SDA2/SCL2. Ensure pull-up resistors are sized correctly for the desired bus speed and bus capacitance on both sides of the translator. For prototyping, this XQFN8 package typically requires a dedicated breakout board or a professional PCB fab due to its 1.6mm x 1.6mm footprint.
