74F251A Datasheet | National Semiconductor

Description The ’F251A is a high-speed 8-input digital multiplexer It provides in one package the ability to select one bit of data from up to eight sources It can be used as a universal function generator to generate any logic function of four variables Both assertion and negation outputs are provided Features Y Multifunctional capability Y On-chip select logic decoding Y Inverting and non-inverting TRI-STATE outputs mercial 74F251APC 74F251ASC (Note 1) 74F251ASJ (Note 1) Military 54F251ADM (Note 2) 54F251AFM (Note 2) 54F251ALL (Note 2) Package Number N16E J16A M16A M16D W16A E20A Package Description 16-Lead (0 300 Wide) Molded Dual-In-Line 16-Lead Ceramic Dual-In-Line 16-Lead (0 150 Wide) Molded Small Outline JEDEC 16-Lead (0 300 Wide) Molded Small Outline EIAJ 16-Lead Cerpack 20-Lead Ceramic Leadless Chip Carrier Type C Note 1 Devices also available in 13 reel Use suffix e SCX and SJX Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB Logic Symbols Connection Diagrams Pin Assignment for DIP SOIC and Flatpak Pin Assignment for LCC IEEE IEC TL F 9504- 3 TL F 9504 - 1 TL F 9504 - 2 TL F 9504- 5 TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 9504 RRD-B30M75 Printed in U S A Unit Loading Fan Out Pin Names S0 - S2 OE I0 - I7 Z Z Description Select Inputs TRI-STATE Output Enable Input (Active LOW) Multiplexer Inputs TRI-STATE Multiplexer Output plementary TRI-STATE Multiplexer Output 54F 74F UL HIGH LOW 10 10 10 10 10 10 150 40 (33 3) 150 40 (33 3) Input IIH IIL Output IOH IOL 20 m A b0 6 m A 20 m A b0 6 m A 20 m A b0 6 m A b3 m A 24 m A (20 m A) b3 m A 24 m A (20 m A) Functional Description This device is a logical implementation of a single-pole 8position switch with the switch position controlled by the state of three Select inputs S0 S1 S2 Both assertion and negation outputs are provided The Output Enable input (OE) is active LOW...