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Functional Description

The ’F583 4-bit binary coded (BCD) full adder performs the

kahead generates the BCD carry terms internally, allowing

the 'F583 to then do BCD addition correctly. For BCD num-

bers 0 through 9 at A and B inputs, the BCD sum forms at

the output. In the addition of two BCD numbers totalling a

number greater than 9, a valid BCD number and a carry will

result.

For input values larger than 9, the number is converted

from binary to BCD. Binary to BCD conversion occurs by

bit binary number to the other set of inputs. If the input is

between 0 and 9, a BCD number occurs at the output. If

the binary input falls between 10 and 15, a carry term is

generated. Both the carry term and the sum are the BCD

equivalent of the binary input. Converting binary numbers

greater than 16 may be achieved through cascading

'F583s.

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.