SparkFun TXB0104 Breakout - Bidirectional Voltage Level Translator 1.2V to 3.6V on A Port and 1.65V to 5.5V on B Port (VCCA  VCCB) VCC Isolation Feature  If Either VCC Input Is at GND, All Outputs Are in the High-Impedance State OE Input Circuit Referenced to VCC Low Power Consumption, 5-A Max ICC