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The CD4017 is a popular CMOS integrated circuit (IC) that functions as a decade counter/divider, counting from 0 to 9 with ten individual decoded outputs, ideal for sequential projects like LED chasers or frequency dividers. It advances its output state with each clock pulse, resetting after ten counts, and features wide voltage tolerance (3V-15V) and good noise immunity, making it versatile for various digital applications.

Features:

Decade Counting: Counts up to 10 states (0-9).
10 Decoded Outputs: One output (Q0-Q9) goes HIGH at each step, providing sequential activation.
Clock Input (CLK): Advances the count on the rising edge of a pulse (Pin 14).
Reset (MR): Resets the counter to the zero state (Pin 15).
Clock Enable (CI): Disables counting when HIGH (Pin 13).
Carry Out (CO): Goes HIGH after the 10th count, useful for cascading to other counters (Pin 12).
Wide Voltage: Operates from 3V to 15V.