The SN74LVC2G07 is a high performance dual buffer with open drain outputs operating from a 1.65 to 5.5V supply. The internal circuit is composed of multiple stages, including an open drain output. The open drain output provides the capability to set the output switching level to a user selectable value with an external resistor and power supply. 

The logic high output value is set by the external power supply and can be less than, equal or greater than the VCC power supply, provided the voltage supply is less than 5.5V.