CD4038BE CMOS Triple Serial Adder IC

The CD4038 triple serial adder features a clock and carry reset inputs common to all or any three adders. The carry is added on the negative–going clock transition. The  CD4038B (Negative Logic) designed as a monolithic integrated circuits consisting of three serial adder circuits with common CLOCK and CARRY−RESET inputs. Meanwhile, each adder has two provisions for 2 serial DATA INPUT signals and an INVERT command signal. When the command signal comes as  a logical “1”, the sum made  complemented.

Data words enter the adder with the smallest amount significant bit first; the sign bit trails. The output comes as the MOD 2 sum of the input bits plus the carry from the previous bit position. The carry merely added at the positive−going clock transition for the NTE4032B or at the negative−going clock for the CD4038B, thus, for spike−free operation the input file transitions should occur as soon as possible after the triggering edge. The CARRY resets to a logical “0” at the top of every word by applying a logical “1” signal to a CARRY− RESET input one−bit−position before the appliance of the primary little bit of subsequent word.

Serial binary addition completed by a flip-flop and a full adder. The flip-flop takes the carry-out signal on each clock cycle.  And provides its value because the carry-in signal on subsequent clock cycle. In any case of the bits of the input operands have arrived, all of the bits of the sum have begin of the sum output. Serial binary adder designed as a combinational logic circuit that performs the addition of two binary numbers in serial form. Serial binary adder performs bit by bit addition. Two shift registers used to store the binary numbers that need to added.