aip74cbtlv3257 is a 4-bit 1-of-2 fet multiplexer/demultiplexer. the circuit has a common selection port (s) and an enable control port (oe(—)).
to ensure the high-impedanceoff-state during power upor power down, oe(—) should be tied to vcc through apull-up resistor.
this device is fully specified for partial power-down applications using ioff. the ioff circuitry disables the output, preventing the damaging backflow current through the device when it is powered down.