54LVX3245 Datasheet | National Semiconductor

.. 54LVX3245 8-Bit Dual Supply Translating Transceiver with TRI-STATE Outputs January 1999 54LVX3245 8-Bit Dual Supply Translating Transceiver with TRI-STATE ® Outputs General Description The LVX3245 is a dual-supply, 8-bit translating transceiver that is designed to interface between a 3V bus and a 5V bus in a mixed 3V/5V supply environment. The Transmit/Receive (T/R) input determines the direction of data flow. Transmit (active-HIGH) enables data from A ports to B ports; Receive (active-LOW) enables data from B ports to A ports. The Output Enable input, when HIGH, disables both A and B ports by placing them in a TRI-STATE condition. The A port interfaces with the 3V bus; the B port interfaces with the 5V bus. The LVX3245 is suitable for mixed voltage applications such as systems using 3.3V memories which must interface with existing busses or other ponents operating at 5.0V. Features n n n n n n n n Bidirectional interface between 3V and 5V buses Inputs patible with TTL level 3V data flow at A port and 5V data flow at B port Outputs source/sink 24 m A Available in ceramic DIP and Flatpack packages Implements proprietary EMI reduction circuitry Functionally patible with the 54 series 245 Standard Microcircuit Drawing (SMD) 5962-9860501 Ordering Code Order Number 54LVX3245J-QML 54LVX3245W-QML Package Number J24F W24C 24-Lead Cerpack Package Description 24-Lead Ceramic Dual-in-line Logic Symbol Connection Diagram Pin Assignment for CDIP and Cerpack DS101018-1 DS101018-2 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS101018 .national. Pin Descriptions Pin Names OE T/R A0- A7 B0- B7 Description Output Enable Input Transmit/Receive Input Side A Inputs or TRI-STATE Outputs Side B Inputs or TRI-STATE Outputs Truth Table Inputs OE L L H H = High Voltage Level L = Low Voltage Level I = Immaterial Outputs T/R L H X Bus B Data to Bus A Bus A Data to Bus B...