SN54F257 selectors/multiplexers equivalent, quadruple 2-line to 1-line data selectors/multiplexers.
The ′F257 is designed to multiplex signals from 4-bit data sources to 4-output data lines in bus-organized systems. The 3-state outputs will not load the data lines when the output enable (OE) input is at a high logic level.
SN54F257 . . . J PACKAGE.
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