CY74FCT257T Datasheet - Texas Instruments

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CY74FCT257T QUAD 2-INPUT MULTIPLEXER

D Function, Pinout, and Drive Compatible With FCT and F Logic D Reduced VOH (Typically = 3.3 V) Version of Equivalent FCT Functions D Edge-Rate Contro.
The CY74FCT257T has four identical two-input multiplexers that select four bits of data from two sources under the control of a common data-select (S).

CY74FCT257T-etcTI.pdf