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To design and implement 16 bit odd/even parity generator using IC 74180.

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Apparatus required:-
The following electronics components are required.
·         NOT Gate (IC-7404)
·         IC-74180
·         Digital IC Trainer KIT
·         Connecting wires
Description:-
A parity bit is used for detecting errors during transmission of binary information. A parity bit is an extra bit included with a binary message to make the number is either even or odd. The message including the parity bit is transmitted and then checked at the receiver ends for errors. An error is detected if the checked parity bit doesn’t correspond to the one transmitted. The circuit that generates the parity bit in the transmitter is called a ‘parity generator’ and the circuit that checks the parity in the receiver is called a ‘parity checker’.
In even parity, the added parity bit will make the total number is even amount. In odd parity, the added parity bit will make the total number is odd amount. The parity checker circuit checks for possible errors in the transmission. If the information is passed in even parity, then the bits required must have an even number of 1’s. An error occur during transmission, if the received bits have an odd number of 1’s indicating that one bit has changed in value during transmission.
Pin Diagram of IC-74180:-
Function Table:-
INPUTS

OUTPUTS
Number of High Data
Inputs (I0 – I7)
PE
PO
∑E
∑O
EVEN
1
0
1
0
ODD
1
0
0
1
EVEN
0
1
0
1
ODD
0
1
1
0
X
1
1
0
0
X
0
0
1
1














Logic Diagram Parity Generator:-

Truth- Table for Parity Generator:-
I7 I6 I5 I4 I3 I2 I1 I0
I7 I6 I5 I4 I3 I2 I1 I0
Active
∑E
∑O
1   1   0   0   0   0   0   0
1  1   0   0   0   0   0  0
1
1
0
1   1   0   0   0   0   0   0
1  1   0   0   0   0   0  0
0
0
1
1   1   0   0   0   0   0   0
0  1   0   0   0   0   0  0
0
1
0
Conclusion: - All the output verified the result of Truth Table.
Precaution in lab:-
·         All the connections should be tight and proper.
·         Handle the ICs carefully.
·         Check the connection once again before Switching on the Digital Trainer KIT.
·         Switch of the Trainer Kit after performing the Experiment.

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