There are a couple of must-have boards that every engineer and hobbyist should have on their desk, and this PCA9306 dual, bidirectional voltage-level translator breakout is one of them! Because different parts sometimes use different voltage levels to communicate, voltage-level translators can be the key to making different parts play nice. The PCA9306 is a dual bidirectional I2C-bus and SMBus voltage-level translator that's operational on the low side from 1.2V to 3.3V and on the high side from 1.8V to 5.5V. Simply apply your low and high-side reference voltages to the VREF1 and VREF2 respectively, connect your I/O and drive the Enable pin high to open bidirectional voltage translation without the use of a direction pin! We've updated this classic board to use a new footprint as well as adding a second ground pin and breaking out the enable pin. Get started with the Sparkfun PCA9306 Logic Level translator guide Resources * Schematic * Eagle Files * Hookup Guide * Datasheet (PCA9306DC) * GitHub Hardware Repo https://elecena.pl/product/22728246/sparkfun-level-translator-breakout-pca9306 2023-03-07 https://elecena.pl/product/22728246/sparkfun-level-translator-breakout-pca9306 2023-06-16 https://elecena.pl/product/22728246/sparkfun-level-translator-breakout-pca9306 2023-12-27 https://elecena.pl/product/22728246/sparkfun-level-translator-breakout-pca9306 2024-09-18 https://elecena.pl/product/22728246/sparkfun-level-translator-breakout-pca9306 2024-11-29 https://elecena.pl/product/22728246/sparkfun-level-translator-breakout-pca9306 2024-11-30 https://elecena.pl/product/22728246/sparkfun-level-translator-breakout-pca9306 2025-04-10 https://elecena.pl/product/22728246/sparkfun-level-translator-breakout-pca9306 2025-04-29 https://elecena.pl/product/22728246/sparkfun-level-translator-breakout-pca9306 2025-08-05 https://elecena.pl/product/22728246/sparkfun-level-translator-breakout-pca9306 2025-11-28 https://elecena.pl/product/22728246/sparkfun-level-translator-breakout-pca9306 2025-11-29