SN54LS181 4-BIT ARITHMETIC LOGIC UNIT

SN54LS181 4-BIT ARITHMETIC LOGIC UNIT

The SN54 / 74LS181 is a 4-bit high speed parallel Arithmetic Logic Unit (ALU). Controlled by the four Function Select Inputs (S0 . . . S3) and the Mode Control Input (M), it can perform all the 16 possible logic operations or 16 different arithmetic operations on active HIGH or active LOW operands. .

Features

OGIC SYMBOL PIN NAMES LOADING (Note a) HIGH A0
  – A3, B0
  – B3 S0
  – S3 M Cn F0
  – F3 A=B G P Cn+4 Operand (Active LOW) Inputs 1.5 U.L. Function — Select Inputs 2.0 U.L. Mode Control Input 0.5 U.L. Carry Input 2.5 U.L. Function (Active LOW) Outputs 10 U.L. Comparator Output Open Collector Carry Generator (Active LOW) 10 U.L. Output Carry Propagate (Active LOW) 10 U.L. Output Carry Output 10 U.L. LOW 0.75 U.L. 1.0 U.L. 0.25 U.L. 1.25 U.L. 5 (2.5) U.L. 5 (2.5) U.L. 10 U.L. 5 U.L. 5 (2.5) U.L. 7 8 6 5 4 3 Cn M 2 1 23 22 21 20 19 18 A0 B0 A1 B1 A2 B2 A3 B3 Cn+4 A=B G P F1 10 F2 11 F3 13 16 14 17 15 .