Octal Buffer/Line Driver - National Semiconductor
Description
54ABT244 Octal Buffer/Line Driver with TRI-STATE Outputs
July 1998
54ABT244 Octal Buffer/Line Driver with TRI-STATE ® Outputs
General Description
The ’ABT244 is an octal buffer and line driver with TRI-STATE outputs designed to be employed as a memory and address driver, clock driver, or bus-oriented transmitter/ receiver.
n Guaranteed simultaneous switching, noise level and dynamic threshold performance n Guaranteed latchup protection n High impedance glitch free bus loading during entire power up and power down cycle n Nondestructive hot insertion capability n Disable time less than enable time to avoid bus contention n Standard Microcircuit Drawing (SMD) 5962-9214701
Features
n Non-inverting buffers n Output sink capability of 48 mA, source capability of 24 mA n Output switching specified for both 50 pF and 250 pF loads
Ordering Code
Military 54ABT244J-QML 54ABT244W-QML 54ABT244E-QML Package Number J20A W20A E20A 20-Lead Ceramic Dual-In-Line 20-Lead Cerpack 20-Lead Ceramic Leadless Chip Carrier, Type C Package Description
Connection Diagrams
Pin Assignment for DIP and Flatpak Pin Assignment for LCC
DS100203-2
DS100203-1
Pin Names OE1, OE2 I0–I7 O0–O7
Description Output Enable Input (Active Low) Inputs Outputs
Truth Table
OE1 H L L I0–3 X H L O0–3 Z H L OE2 H L L I4–7 X H L O4–7 Z H L
H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Z = High Impedance
TRI-STATE ® is a registered trademark of National Semiconductor Corporation.
© 1998 National Semiconductor Corporation
DS100203
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Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications.
Storage Temperature Ambient Temperature under Bias Junction Temperature under Bias Ceramic VCC Pin Potential to Ground Pin Input Voltage (Note 2) Input Current (Note 2) Voltage Applied to Any Output in the Disabled or Power-Off State in the HIGH State −65˚C ...
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