The SN74LVC1G125B-EP device is a single bus buffer gate/line driver with 3-state output. The output is disabled when the output-enable ( OE) input is high. When OE is low, true data is passed from the A input to the Y output. To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver.