Pin 16 is used to supply the power to the IC to make it functional. It has internal pull up resistors which eliminate the requirement of external resistors. It comes with Ripple Blanking Input and output pins which helps to remove the unnecessary zero in case of multiple 7-Segments. The IC is fully functional with any common cathode 7-segment.
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¿Cómo funciona el 74LS47?
74LS47 Price ( Datasheet, Hoja de datos )
74LS47 Datasheet PDF - ON Semiconductor