54AC245 Datasheet | National Semiconductor

.. - 54ACT245 Octal Bidirectional Transceiver with TRI-STATE Inputs/Outputs August 1998 - 54ACT245 Octal Bidirectional Transceiver with TRI-STATE ® Inputs/Outputs General Description The ’AC/’ACT245 contains eight non-inverting bidirectional buffers with TRI-STATE outputs and is intended for bus-oriented applications. Current sinking capability is 24 m A at both the A and B ports. The Transmit/Receive (T/R) input determines the direction of data flow through the bidirectional transceiver. 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 HIGH Z condition. Features n n n n n n ICC and IOZ reduced by 50% Noninverting buffers Bidirectional data path A and B outputs source/sink 24 m A ’ACT245 has TTL-patible inputs Standard Microcircuit Drawing (SMD) - ’AC245: 5962-87758 - ’ACT245: 5962-87663 Logic Symbols IEEE/IEC DS100283-1 DS100283-2 Pin Names OE T/R A0- A7 B0- B7 Description Output Enable Input Transmit/Receive Input Side A TRI-STATE Inputs or TRI-STATE Outputs Side B TRI-STATE Inputs or TRI-STATE Outputs TRI-STATE ® is a registered trademark of National Semiconductor Corporation. FACT ® is a registered trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100283 .national. Connection Diagrams Pin Assignment for DIP and Flatpak Pin Assignment for LCC DS100283-4 Truth Table Inputs OE DS100283-3 Outputs T/R L H X Bus B Data to Bus A Bus A Data to Bus B HIGH-Z State H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial .national....