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54ACT245

National Semiconductor

Octal Bidirectional Transceiver

www.DataSheet4U.com 54AC245 • 54ACT245 Octal Bidirectional Transceiver with TRI-STATE Inputs/Outputs August 1998 54AC...



54ACT245

National Semiconductor


Octopart Stock #: O-571865

Findchips Stock #: 571865-F

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www.DataSheet4U.com 54AC245 • 54ACT245 Octal Bidirectional Transceiver with TRI-STATE Inputs/Outputs August 1998 54AC245 • 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 applicat
More View ions. 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 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 mA ’ACT245 has TTL-compatible 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 www.national.com 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 L L H H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial www.national.com 2 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage (VCC) DC Input Diode Current (IIK) VI = −0.5V VI = VCC + 0.5V DC Input Voltage (VI) DC Output Diode Current (IOK) VO = −0.5V VO = VCC + 0.5V DC Output Voltage (VO) DC Output Source or Sink Current (IO) DC VCC or Ground Current per Output Pin (ICC or IGND) Storage Temperature (TSTG) Junction Temperature (TJ) CDIP −0.5V to +7.0V −20 mA +20 mA −0.5V to VCC + 0.5V −20 mA +20 mA −0.5V to VCC + 0.5V Recommended Operating Conditions Supply Voltage (VCC) ’AC ’ACT Input Voltage (VI) Output Voltage (VO) Operating Temperature (TA) 54AC/ACT Minimum Input Edge Rate (∆V/∆t) ’AC Devices VIN from 30% to 70% of VCC VCC @ 3.3V, 4.5V, 5.5V Minimum Input Edge Rate (∆V/∆t) ’ACT Devices VIN from 0.8V to 2.0V VCC @ 4.5V, 5.5V 2.0V to 6.0V 4.5V to 5.5V 0V to VCC 0V to VCC −55˚C to +125˚C 125 mV/ns ± 50 mA ± 50 mA −65˚C to +150˚C 175˚C 125 mV/ns Note 1: Absolute maximum ratings are those values beyond which damage to the d






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