The AiP74HC/HCT540 is an 8-bit inverting buffer/line driver with 3-state outputs. The device features two output enables (OE(—)1 and OE(—)2). A HIGH on OE(—)n causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.