The PCA9306H device is a dual bidirectional I2C and SMBus voltage-level translator with an enable (EN) input, and is operational from 1.2V to 3.3V VREF1 and 1.8V to 5.5V VREF2.
The PCA9306H device allows bidirectional voltage translations between 1.2V and 5V, 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 PCA9306H device can be used to separate a 400kHz bus from a 100kHz bus by controlling the EN pin to disconnect the slower bus during fast-mode communication.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | PCA9306H Dual Bidirectional I2C Bus and SMBus Voltage-Level Translator datasheet | PDF | HTML | 04 May 2026 |
| Selection guide | Logic Guide (Rev. AC) | PDF | HTML | 13 Nov 2025 | |
| Application note | Understanding and Interpreting Standard-Logic Data Sheets (Rev. C) | 02 Dec 2015 | ||
| Application note | Programming Fun Lights With TI's TCA6507 | 30 Nov 2007 | ||
| Application note | Semiconductor Packing Material Electrostatic Discharge (ESD) Protection | 08 Jul 2004 |
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Generic EVM designed to support any logic or translation device that has a DTT, DRY, DPW, DTM, DQE, DQM, DSF, or DTQ package. Board design allows for flexible evaluation.
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