54AC251 Datasheet | National Semiconductor

.. - 54ACT251 8-Input Multiplexer with TRI-STATE Output August 1998 - 54ACT251 8-Input Multiplexer with TRI-STATE ® Output General Description The ’AC/’ACT251 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 universal function generator to generate any logic function of four variables. Both true and plementary outputs are provided. n n n n n n Multifunctional capability On-chip select logic decoding Inverting and noninverting TRI-STATE outputs Outputs source/sink 24 m A ’ACT251 has TTL-patible inputs Standard Military Drawing (SMD) - ’AC251: 5962-87692 - ’ACT251: 5962-89599 Features n ICC reduced by 50% Logic Symbols IEEE/IEC DS100284-1 DS100284-2 Pin Names S0- S2 OE I0- I7 Z Z Select Inputs Description TRI-STATE Output Enable Input Multiplexer Inputs TRI-STATE Multiplexer Output plementary TRI-STATE Multiplexer Output TRI-STATE ® is a registered trademark of National Semiconductor Corporation. FACT ® is a registered trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100284 .national. Connection Diagrams Pin Assignment for DIP and Flatpak Functional Description This device is a logical implementation of a single-pole, 8-position switch with the switch position controlled by the state of three Select inputs, S0, S1, S2. Both true and plementary outputs are provided. The Output Enable input ( OE) is active LOW. When it is activated, the logic function provided at the output is: Z = OE - (I0 - S0 - S1 - S2 + I1 - S0 - S1 - S 2 + I...