74F382 Datasheet | National Semiconductor

Description The ’F382 performs three arithmetic and three logic operations on two 4-bit words A and B Two additional Select input codes force the Function outputs LOW or HIGH An Overflow output is provided for convenience in twos plement arithmetic A Carry output is provided for ripple expansion For high-speed expansion using a Carry Lookahead Generator refer to the ’F381 data sheet Features Y Y Y Y Y Performs six arithmetic and logic functions Selectable LOW (clear) and HIGH (preset) functions LOW input loading minimizes drive requirements Carry output for ripple expansion Overflow output for twos plement arithmetic mercial 74F382PC 74F382SC (Note 1) 74F382SJ (Note 1) Package Number N20A M20B M20D Package Description 20-Lead (0 300 Wide) Molded Dual-In-Line 20-Lead (0 300 Wide) Molded Small Outline JEDEC 20-Lead (0 300 Wide) Molded Small Outline EIAJ Note 1 Devices also available in 13 reel Use suffix e SCX and SJX Logic Symbols IEEE IEC Connection Diagram Pin Assignment for DIP and SOIC TL F 9529 - 1 TL F 9529- 6 TL F 9529- 3 C1995 National Semiconductor Corporation TL F 9529 RRD-B30M105 Printed in U S A http://.. Unit Loading Fan Out 74F Pin Names Description UL HIGH LOW 10 40 10 40 10 10 10 50 50 33 3 50 33 3 50 33 3 Input IIH IIL Output IOH IOL 20 m A b2 4 m A 20 m A b2 4 m A 20 m A b0 6 m A 20 m A b3 0 m A b 1 m A 20 m A b 1 m A 20 m A b 1 m A 20 m A A0 - A3 B0 - B3 S0 - S2 Cn Cn a 4 OVR F0 - F3 A Operand Inputs B Operand Inputs Function Select Inputs Carry Input Carry Output Overflow Output Function Outputs Functional Description Signals applied to the Select inputs S0 - S2 determine the mode of operation as indicated in the Function Select Table An extensive listing of input and output levels is shown in the Truth Table The circuit performs the arithmetic functions for either active HIGH or active LOW operands with output levels in the same convention In the Subtract operating modes it is necessary to force a carry (HIGH for active HIGH operands LOW for...