The LVXC164245 is a 48-pin dual-supply 16-bit configurable voltage interface transceiver suited for PCMCIA and other real time configurable I O applications The VCCB pin accepts a 5V supply level The ``B'' port is a dedicated 5V port The VCCA pin accepts a 3V-to-5V supply level The ``A'' port is configured to track the VCCA supply level respectively A 5V level on the VCC pin will configure the I O pins at a 5V level and a 3V VCC will configure the I O pins at a 3V level This device will allow the VCCA voltage source pin and I O pins on the ``A'' port to float when OE is HIGH This feature is necessary to buffer data to and from a PCMCIA socket that permits PCMCIA cards to be inserted and removed during normal operation