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54LVXC4245 Scheda tecnica(PDF) 1 Page - National Semiconductor (TI) |
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54LVXC4245 Scheda tecnica(HTML) 1 Page - National Semiconductor (TI) |
1 / 9 page 54LVXC4245 8-Bit Dual Supply Configurable Voltage Interface Transceiver with TRI-STATE® Outputs General Description The LVXC4245 is a 24-pin dual-supply, 8-bit configurable voltage interface transceiver suited for real time configurable I/O applications. The V CCA pin accepts a 5V supply level. The “A” port is a dedicated 5V port. The V CCB pin accepts a 3V-to-5V supply level. The “B” port is configured to track the V CCB supply level respectively. A 5V level on the VCC pin will configure the I/O pins at a 5V level and a 3V V CC will config- ure the I/O pins at a 3V level. 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 socket that permits live insertion and removal during normal operation. Features n Bidirectional interface between 5V and 3V-to-5V buses n Control inputs compatible with TTL level n Outputs source/sink up to 24 mA n Available in Cerpack and CDIP packages n Implements patented EMI reduction circuitry n Flexible VCCB operating range n Allows B port and VCCB to float simultaneously when OE is HIGH n Functionally compatible with the 54 series 245 n Standard Microcircuit Drawing (SMD) 5962-9862001 Ordering Code Order Number Package Number Package Description 54LVXC4245W-QML W24C 24-Lead Ceramic Flatpack 54LVXC4245J-QML J24F 24-Lead Ceramic Dual-in-line Logic Symbol Pin Descriptions Pin Names Description OE Output Enable Input T/R Transmit/Receive Input A 0–A7 Side A Inputs or TRI-STATE Outputs B 0–B7 Side B Inputs or TRI-STATE Outputs Connection Diagram TRI-STATE® is a registered trademark of National Semiconductor Corporation DS101033-1 Pin Assignment for Cerpack and CDIP DS101033-2 March 1999 © 1999 National Semiconductor Corporation DS101033 www.national.com |
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