9348 Datasheet, PDF (4/6 Pages) Texas Instruments – 9348 12-Input Parity Checker/Generator

Functional Description
The 9348 is a 12-input parity generator It provides odd and even parity for up to 12 data bits The Even Parity output (PE) will be
HIGH if an even number of logic ones are present on the inputs The Odd Parity output (PO) will be HIGH if an odd number of
logic ones are present on the inputs The logic equations for the outputs are shown below
PO e ^{I0 Z I1 Z I2 Z I3 Z I4 Z I5 Z I6 Z I7 Z I8 Z I9 Z I10 Z I11}
PE e _{I0 Z I1 Z I2 Z I3 Z I4 Z I5 Z I6 Z I7 Z I8 Z I9 Z I10 Z I11}
Note Less through delay is encountered from the I0 I1 I2 and I3 inputs than I4 thru I11 inputs Therefore if some signals are slower than others the slower
signals should be applied to these four inputs for maximum speed
Truth Table
Inputs
I0 – I11
All Twelve
Any One
Any Two
Any Three
Any Four
Any Five
Any Six
Any Seven
Any Eight
Any Nine
Any Ten
Any Eleven
Any Twelve
Inputs LOW
Inputs HIGH
Inputs HIGH
Inputs HIGH
Inputs HIGH
Inputs HIGH
Inputs HIGH
Inputs HIGH
Inputs HIGH
Inputs HIGH
Inputs HIGH
Inputs HIGH
Inputs HIGH
H e HIGH Voltage Level
L e LOW Voltage Level
Outputs
PO
PE
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
Logic Diagram
TL F 9795 – 3
3