he SN54AS181B and SN74AS181A arithmetic Logic units (ALUs) / function generators have a complexity of 75 equivalent Gates on a monolithic chip. These circuits perform 16 binary arithmetic operations on two 4-bit words as shown in Tables 1 and 2. These operations are selected by the four function-select (S0, S1, S2, and S3) lines and include addition, subtraction, decrement, and straight transfer. When performing arithmetic manipulations, the internal carries are enabled by applying a low-level voltage to the mode-control (M) input. A full carry look-ahead scheme is used to generate fast, simultaneous carry by means of two cascade (G and P) outputs for the four bits in the package. If high speed is not important, a ripple-carry (Cn) input and a ripple-carry (Cn + 4) output are available. The ripple-carry delay is minimized so that arithmetic manipulations for small word lengths CAN be performed without external circuitry. By Texas Instruments
SN54AS181B 's PackagesSN54AS181B 's pdf datasheet

SN54AS181B Pinout, Pinouts
SN54AS181B pinout,Pin out
This is one package pinout of SN54AS181B,If you need more pinouts please download SN54AS181B's pdf datasheet.

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