MC74LVXC3245

The 74LVXC3245 is a 24pin dualsupply, octal configurable voltage interface transceiver especially well suited for PCMCIA and other real time configurable I/O applications. The V_CCA pin accepts a 3V supply level; the A port is a dedicated 3V port. The V_CCB pin accepts a 3Vto5V supply level. The B port is configured to track the V_CCB supply level. A 5V level on the V_CCB pin will configure the I/O pins at a 5V level and a 3V V_CCB will configure the I/O pins at a 3V level. The A port interfaces with a 3V host system and the B port to the card slots. This device will allow the V_CCB voltage source pin and I/O pins on the B 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. The Transmit/Receive (T/R) input determines the direction of data flow. Transmit (activeHigh) enables data from the A port to B port. Receive (activeLow) enables data from the B port to the A port.