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74LS257B

Part Number	74LS257B
Manufacturer	Fairchild Semiconductor
Description	3-STATE Quad 2-Data Selectors/Multiplexers
Published	Apr 29, 2015
Detailed Description	DM74LS257B 3-STATE Quad 2-Data Selectors/Multiplexers June 1989 Revised November 1999 DM74LS257B 3-STATE Quad 2-Data S...
Datasheet	74LS257B PDF File

Overview

DM74LS257B 3-STATE Quad 2-Data Selectors/Multiplexers June 1989 Revised November 1999 DM74LS257B 3-STATE Quad 2-Data Selectors/Multiplexers General Description These Schottky-clamped high-performance multiplexers feature 3-STATE outputs that can interface directly with data lines of bus-organized systems.
With all but one of the common outputs disabled (at a high impedance state), the low impedance of the single enabled output will drive the bus line to a HIGH or LOW logic level.
To minimize the possibility that two outputs will attempt to take a common bus to opposite logic levels, the output enable circuitry is designed such that the output disable times are shorter than the output enab...

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