54ac280 National Semiconductor Corporation, 54ac280 Datasheet

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54ac280

Manufacturer Part Number
54ac280
Description
9-bit Parity Generator/checker
Manufacturer
National Semiconductor Corporation
Datasheet
© 1998 National Semiconductor Corporation
54AC280
9-Bit Parity Generator/Checker
General 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 complement of the Sum Even output.
Logic Symbols
FACT
I
0
–I
O
E
Names
8
Pin
is a trademark of Fairchild Semiconductor Corporation.
Data Inputs
Odd Parity Output
Even Parity Output
Description
IEEE/IEC
DS100359-4
DS100359
DS100359-1
Features
n I
n 9-bit width for memory applications
n Standard Microcircuit Drawing (SMD) 5962-92201
Connection Diagrams
Truth Table
H = HIGH Voltage Level
L = LOW Voltage Level
0, 2, 4, 6, 8
1, 3, 5, 7, 9
CC
HIGH Inputs
reduced by 50%
Number of
I
0
–I
8
Pin Assignment for LCC
Pin Assignment for
DIP and Flatpak
Even
H
L
DS100359-2
Outputs
DS100359-3
September 1998
www.national.com
Odd
H
L

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54ac280 Summary of contents

Page 1

... Parity Generator/Checker General 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 even number of inputs is HIGH, the Sum Even output is HIGH odd number is HIGH, the Sum Even output is LOW. The Sum Odd output is the complement of the Sum Even output ...

Page 2

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 2 DS100359-5 ...

Page 3

Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage ( Input Diode Current ( −0. ...

Page 4

DC Characteristics for ’AC Family Devices Symbol Parameter I Maximum Quiescent CC Supply Current Note 2: All outputs loaded; thresholds on input associated with output under test. Note 3: Maximum test duration 2.0 ms, one output loaded at a time. ...

Page 5

Physical Dimensions inches (millimeters) unless otherwise noted 20 Terminal Ceramic Leadless Chip Carrier 14 Lead Ceramic Dual-In-Line Package NS Package Number E20A NS Package Number J14A 5 www.national.com ...

Page 6

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 ...

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