onsemi (Ansemi)

TSSOP-24

Tube

62

The 74LVXC3245 is a 24-pin dual-supply, octal configurable voltage interface transceiver for PCMCIA and other real-time configurable I/O applications. The VCCA pin accepts a 3V supply level; the A port is a dedicated 3V port. The VCCB pin accepts a 3V-5V supply level. The B port is configured to track the VCCB supply level. A 5V level on the VCCB pin configures the I/O pin at 5V and a 3V VCCB configures the I/O pin at 3V. The A port should be connected to the 3V main system, and the B port should be connected to the card slot. The device will allow the VCCB supply pin and I/O pins on Port B to float when OE is high. This feature is required for bidirectional data buffering with the PCMCIA slot to allow insertion and removal of PCMCIA cards during normal operation. The transmit/receive (T/R) input determines the data flow. A transfer (active high) enables data transfer from the A port to the B port. Receive (active low) enables data transfer from the B port to the A port.