6 Detailed Description

6.1 Overview

The ’AC283 and ’ACT283 4-bit binary adders with fast carry that utilize Advanced CMOS Logic technology.

These devices add two 4-bit binary numbers and generate a carryout bit if the sum exceeds 15.

Because of the symmetry of the add function, this device can be used with either all active-HIGH operands

(positive logic) or with all active-LOW operands (negative logic). When using positive logic, the carry-in input

must be tied LOW if there is no carry-in.

6.2 Functional Block Diagram

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CD54AC283, CD74AC283, CD54ACT283, CD74ACT283

SCHS251E – NOVEMBER 1998 – REVISED JANUARY 2025

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Product Folder Links: CD54AC283 CD74AC283 CD54ACT283 CD74ACT283