54AC280 Datasheet | National Semiconductor

Description The ’AC280 is a high-speed parity generator/checker that accepts nine bits of input data and detects whether an even or an odd number of these inputs is HIGH. If an even number of inputs is HIGH, the Sum Even output is HIGH. If an odd number is HIGH, the Sum Even output is LOW. The Sum Odd output is the plement of the Sum Even output. Features n ICC reduced by 50% n 9-bit width for memory applications n Standard Microcircuit Drawing (SMD) 5962-92201 Logic Symbols Connection Diagrams Pin Assignment for DIP and Flatpak DS100359-1 IEEE/IEC DS100359-2 Pin Assignment for LCC DS100359-4 Pin Names I0- I8 ∑O ∑E Description DS100359-3 Data Inputs Odd Parity Output Even Parity Output Truth Table Number of HIGH Inputs I0- I8 0, 2, 4, 6, 8 1, 3, 5, 7, 9 H = HIGH Voltage Level L = LOW Voltage Level Outputs ∑ Even ∑ Odd FACT™ is a trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100359 .national. Logic Diagram DS100359-5 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. .national. 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) - 0.5V to +7.0V - 20 m A +20 m A - 0.5V to VCC + 0.5V - 20 m A +20 m A - 0.5V to VCC +...