DESCRIPTION
OF ”B” SERIES CMOS DEVICES” EY (Plastic Package) F (Ceramic Frit Seal Package) M1 (Micro Package) ORDER CODES : HCC40181BF HCF40181BEY HCF40181BM1 PIN CONNECTIONS DESCRIPTION
The mode control input M selects logical (M = High) or arithmetic (M = Low) operation. The four select inputs (S0, S1, S2, and S3) select the desired logical or arithmetic functions, which include AND, OR, NAND, NOR, and exclusive-OR and-NOR in the logical mode, and addition, subtraction, decrement, left-shift and straight transfer in the arithmetic mode, according to the truth table. The HCC/HCF40181B operation may be interpreted with either active-low or activehigh data at the A and B word inputs and the function outputs F, by using the appropriate truth table. The HCC/HCF40181B contains logic for full look-ahead carry operation for fast carry generation using the carry-generate and carry-propagate outputs G and June 1989 1/12 HCC/HCF40181B P for the four bits of the HCC/HCF40181B . Use of the HCC/HCF40182B look-ahead carry generator in conjunction with multiple HCC/HCF40181B’s permits high-speed arithmetic operations on long words.
STMicroelectronics
