74LS283.pdf 54LS283 DM54LS283 DM74LS283 4-Bit Binary Adders with Fast Carry June 1989 54LS283 DM54LS283 DM74LS283 4-Bit Binary Adders with Fast Carry General Description Features These full adders perform the addition of two 4-bit binary Y Full-carry look-ahead across the four bits numbers The sum (R) outputs are provided for each bit and Y Systems achieve partial look-ahead performance with the resultant carry (C4) is obtained from the fourth bit ……