Service Manuals, User Guides, Schematic Diagrams or docs for : . Electronic Components Datasheets Various datasheets 74ls257

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                                                                                   SN54/74LS257B
QUAD 2-INPUT MULTIPLEXER                                                           SN54/74LS258B
WITH 3-STATE OUTPUTS
  The LSTTL / MSI SN54 / 74LS257B and the SN54 / 74LS258B are Quad
2-Input Multiplexers with 3-state outputs. Four bits of data from two sources
can be selected using a Common Data Select input. The four outputs present         QUAD 2-INPUT MULTIPLEXER
the selected data in true (non-inverted) form. The outputs may be switched to        WITH 3-STATE OUTPUTS
a high impedance state with a HIGH on the common Output Enable (EO) In-
put, allowing the outputs to interface directly with bus oriented systems. It is         LOW POWER SCHOTTKY
fabricated with the Schottky barrier diode process for high speed and is com-
pletely compatible with all Motorola TTL families.

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