74LVXC3245 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs February 2009 74LVXC3245 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs Features General Description Bidirectional interface between 3V and 3V-to-5V buses The LVXC3245 is a 24-pin dual-supply, 8-bit configurable voltage interface transceiver suited for PCMCIA and other Control inputs compatible with TTL level real time configurable I/O applications. The V pin CCA Outputs source/sink up to 24 mA accepts a 3V supply level. The A Port is a dedicated 3V Guaranteed simultaneous switching noise level and port. The V pin accepts a 3V-to-5V supply level. The B CCB dynamic threshold performance Port is configured to track the V supply level respec- CCB Implements proprietary EMI reduction circuitry tively. A 5V level on the V pin will configure the I/O pins CC Flexible V operating range CCB at a 5V level and a 3V V will configure the I/O pins at a CC Allows B Port and V to float simultaneously when OE CCB 3V level. The A Port should interface with a 3V host system is HIGH and the B Port to the card slots. This device will allow the V voltage source pin and I/O pins on the B Port to float Functionally compatible with the 74 series 245 CCB 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. Ordering Code: Order Number Package Number Package Description 74LVXC3245WM M24B 224-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 74LVXC3245QSC MQA24 24-Lead Quarter Size Outline Package (QSOP), JEDEC MO-137, 0.150 Wide 74LVXC3245MTC MTC24 24-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Devices also available in Tape and Reel. Specify by appending suffix letter X to the ordering code. Logic Symbol/s Connection Diagram/s Pin Descriptions Pin Names Description OE Output Enable Input T/R Transmit/Receive Input A A Side A Inputs or 3-STATE Outputs 0 7 B B Side B Inputs or 3-STATE Outputs 0 7 1994 Fairchild Semiconductor Corporation www.fairchildsemi.com74LVXC3245 8-Bit Dual Supply Configurable Voltage Interface Transceiver with 3-STATE Outputs Truth Table/s Inputs Outputs OE T/R L L Bus B Data to Bus A L H Bus A Data to Bus B H X HIGH-Z State H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Logic Diagram/s www.fairchildsemi.com 2