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Partname:CD74HCT253
Description:High Speed CMOS Logic Dual 4-Input Multiplexer
Manufacturer:Texas Instruments
Datasheet:PDF (58.8K).
Click here to download *)

The Harris CD74HC253 and CD74HCT253 are dual 4-to-1 line selector/multiplexers having three-state outputs. One of four sources for each section is selected by the common select inputs, S0 and S1. When the output enable (1OE, 2OE) is HIGH, the output is in the high-impedance state.

Click here to download CD74HCT253 Datasheet
Click here to download CD74HCT253 Datasheet
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