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54ACTQ245 Datasheet(PDF) 2 Page - Texas Instruments |
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54ACTQ245 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 10 page 54ACQ245 • 54ACTQ245 Quiet Series Octal Bidirectional Transceiver with TRI-STATE® Inputs/Outputs General Description The ’ACQ/’ACTQ245 contains eight non-inverting bidirec- tional buffers with TRI-STATE outputs and is intended for bus-oriented applications. Current sinking capability is 24 mA at both the A and B ports. The Transmit/Receive (T/R) input determines the direction of data flow through the bidi- rectional 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 mA n Faster prop delays than the standard ’ACT245 n 4 kV minimum ESD immunity (’ACQ) n Standard Military Drawing (SMD) — ’ACTQ245: 5962-92187 — ’ACQ245: 5962-92177 Logic Symbols Pin Description Names OE Output Enable Input T/R Transmit/Receive Input A 0–A7 Side A TRI-STATE Inputs or TRI-STATE Outputs B 0–B7 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. DS100237-1 IEEE/IEC DS100237-2 September 1998 © 1998 National Semiconductor Corporation DS100237 www.national.com |
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