The maximum clock frequency for the CD54HC4017F3A is 10 MHz. However, it's recommended to check the timing diagrams and clock frequency limitations in the datasheet to ensure proper operation.
To ensure proper power and decoupling, connect the VCC pin to a stable 2-6V power supply, and decouple the power supply lines with 0.1uF and 10uF capacitors. Additionally, use a 10kΩ pull-up resistor on the clock input (CLK) to prevent clock signal degradation.
The CD54HC4017F3A can sink or source up to 25mA of current per output pin. However, it's recommended to limit the output current to 10mA or less to ensure reliable operation and prevent overheating.
The inhibit (INH) input pin is active-low, meaning it should be connected to GND to enable the counter. When INH is high, the counter is disabled, and the outputs are in a high-impedance state. Connect INH to VCC or leave it open to disable the counter.
The carry-out (CO) pin is an output that goes high when the counter overflows from 9 to 0. This pin can be used to cascade multiple counters or to generate a signal when the counter reaches a specific count.
CD54HC4017F3A datasheet
by Texas Instruments
