SN74AUP1G125 Low-Power Single Bus Buffer Gates Texas Instruments SN74AUP1G125 Low-Power Single Bus Buffer Gates offer a single-line driver with a 3-state output. When the output-enable (OE) input goes high, the output is disabled. The Input-Disable feature allows floating input conditions, while the Ioff supports partial-power-down mode operation. The high-impedance state is guaranteed during power up or power down only if the OE is tied to VCC through a pull-up resistor. The current-sinking capability of the driver determines the minimum value of the resistor.