The device allows data transmission from the A bus to the B bus or from the B bus to the A bus, depending upon the logic levels at the output-enable (OEBA and OEAB) inputs. The outputs are in the high-impedance state during power-up and power-down conditions. The outputs remain in the high-impedance state while the device is powered-down. The SN74BCT29864B is characterized for operation from 0C to 70C. FUNCTION TABLE