54ACQ245 Datasheet | National Semiconductor

Description The ’ACQ/’ACTQ245 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. The ’ACQ/’ACTQ utilizes NSC Quiet Series technology to guarantee quiet output switching and improve dynamic threshold performance. FACT Quiet Series™ features GTO™ output control and undershoot corrector in addition to a split ground bus for superior performance. Features n ICC and IOZ reduced by 50% n Guaranteed simultaneous switching noise level and dynamic threshold performance n Improved latch-up immunity n TRI-STATE outputs drive bus lines or buffer memory address registers n Outputs source/sink 24 m A n Faster prop delays than the standard ’ACT245 n 4 k V minimum ESD immunity (’ACQ) n Standard Military Drawing (SMD) - ’ACTQ245: 5962-92187 - ’ACQ245: 5962-92177 Logic Symbols IEEE/IEC DS100237-1 DS100237-2 Pin Names OE T/R A0- A7 B0- B7 Output Enable Input Description Transmit/Receive Input Side A TRI-STATE Inputs or TRI-STATE Outputs Side B TRI-STATE Inputs or TRI-STATE Outputs GTO™ is a trademark of National Semiconductor Corporation. TRI-STATE ® is a registered trademark of National Semiconductor Corporation. FACT ® is a registered trademark of Fairchild Semiconductor Corporation. FACT Quiet Series™ is a trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100237 .national. Connection Diagrams Pin Assignment for DIP and Flatpak Pin Assignment for LCC DS100237-4 DS100237-3 Truth Table Inputs OE L L H T/R L H X Bus B Data to Bus A Bus A Data to Bus B HIGH-Z State...