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MC14560B - NBCD Adder

Key Features

  • r the subtraction of the NBCD numbers, A and B: R=A.
  • B where R is the result. Now bias both sides of the equation by 10N.
  • 1 where N is the number of digits in A and B. R + 10N.
  • 1 A.
  • B + 10N.
  • 1 Rearranging, R + 10N.
  • 1 A + (10N.
  • 1.
  • B) The term (10N.
  • 1.
  • B),.
  • B biased by 10N.
  • 1, is known as the 9’s complement of B. When A > B, R + 1.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC14559B See Page 398 MC14560B NBCD Adder The MC14560B adds two 4–bit numbers in NBCD (natural binary coded decimal) format, resulting in sum and carry outputs in NBCD code. This device can also subtract when one set of inputs is complemented with a 9’s Complementer (MC14561B). All inputs and outputs are active high. The carry input for the least significant digit is connected to VSS for no carry in.