the aip74lvc4245 is an octal dual supply translating transceiver featuring non-inverting 3-state bus compatible outputs in both send and receive directions. it is designed to interface between a 3v and 5v bus in a mixed 3v and 5v supply environment.
the device features an output enable input (pin ) for easy cascading and a send/receive input (pin dir) for direction control. pin controls the outputs so that the buses are effectively isolated.
in suspend mode, when vcc(a) is zero, there will be no current flow from one supply to the other supply. the a-outputs must be set 3-state and the voltage on the a-bus must be smaller than vdiode (typical 0.7v).
vcc(a)vcc(b), except in suspend mode.