54abt646 National Semiconductor Corporation, 54abt646 Datasheet
54abt646
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54abt646 Summary of contents
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... B register and/or B data may be stored in the A regis- ter. Ordering Code Military Package Number 54ABT646J-QML J24A 54ABT646W-QML W24C 54ABT646E-QML E28A TRI-STATE ® registered trademark of National Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100209 Features n Independent registers for A and B buses n Multiplexed real-time and stored data ...
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Connection Diagrams Pin Assignment for DIP and Flatpak DS100209-3 Pin Descriptions www.national.com Pin Assignment for LCC Pin Description Names A –A Data Register A Inputs TRI-STATE Outputs B –B Data Register B Inputs TRI-STATE Outputs CPAB, ...
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Connection Diagrams (Continued) Real Time Transfer A-Bus to B-Bus DS100209-5 FIGURE 1. Real Time Transfer B-Bus to A-Bus DS100209-6 FIGURE 2. Inputs OE DIR CPAB CPBA SAB SBA ...
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Logic Diagram Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. www.national.com DS100209-9 4 ...
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Absolute Maximum Ratings 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 V Pin Potential to Ground Pin CC Input ...
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DC Electrical Characteristics < Note 4: For 8-bit toggling, I 1.4 mA/MHz. CCD Note 5: Guaranteed but not tested. AC Electrical Characteristics Symbol Parameter f Max Clock Frequency max t Propagation Delay PLH t Clock to Bus PHL t Propagation ...
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Capacitance (Continued Temperature (T ) PLH pF, 1 Output Switching C L Clock to Bus t vs Load Capacitance PLH = 25˚C 1 Output Switching Clock to Bus t vs Load Capacitance PLH ...
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Capacitance (Continued Temperature (T ) PZL pF, 1 Output Switching Bus t vs Temperature (T ) PZH pF, 1 Output Switching Temperature (T ) ...
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Capacitance (Continued Temperature (T ) PZL pF, 8 Outputs Switching Bus t vs Load Capacitance PZL = 25˚C 8 Outputs Switching Bus t and t vs Number ...
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Capacitance (Continued Frequency, Average 25˚ 5. All Outputs Unloaded/Unterminated; All Outputs Switching in phase 50% Duty Cycle @ t LOW vs Temperature (T ) SET pF, 1 Output ...
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AC Loading DS100209-10 Includes jig and probe capacitance * FIGURE 5. Standard AC Test Load FIGURE 6. Test Input Signal Levels Input Pulse Requirements Amplitude Rep. Rate 3.0V 1 MHz 500 ns 2.5 ns FIGURE 7. Test ...
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Physical Dimensions inches (millimeters) unless otherwise noted 28-Lead Ceramic Leadless Chip Carrier (L) 24-Lead Ceramic Dual-in-Line Package (D) NS Package Number E28A NS Package Number J24A 13 www.national.com ...
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued) LIFE SUPPORT POLICY NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DE- VICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMI- CONDUCTOR ...