PCA9306DP1,125
Overview
The PCA9306DP1,125 is a dual bidirectional I2C-bus and SMBus voltage-level translator that allows for data transfer between 1 V and 5 V without a direction pin. It functions as a voltage-controlled switch with a low ON-state connection, enabling open-drain I/O ports to interface across different power domains. This specific variant is housed in an 8-pin TSSOP package and supports a wide VCCB range up to 5.5 V.
Why Choose This Part
This device features a flow-through pinout that simplifies PCB routing and minimizes trace length mismatches. It operates with a very low supply current of 5 uA and provides high-impedance states for the I/O pins when the Enable pin is held low. The passive switch architecture ensures low propagation delay and eliminates the need for a direction control signal.
Applications
Key Specifications
Getting Started
When designing with the PCA9306, ensure that the EN pin is tied to VCCB through a 200 kiloohm resistor and that appropriate pull-up resistors are selected for both the low-side and high-side bus segments. For prototyping, this IC is widely available on breakout boards from vendors like Adafruit or SparkFun. Verify that the VCCA voltage is always less than or equal to VCCB to maintain proper translation logic.
