If there is no clock, it should not be left unconnected it should be connected either to the supply voltage or to the ground, according to the input standard rules of CMOS. As we discussed above, this IC needs a clock according to whose clock cycles there is sequential high and low in the output pins. This clock is the frequency provider for the working of this IC. Related Post: Automatic LED Emergency Light Circuit Making the enable pin high will make the IC ignore the clock input it is getting. The IC switches off when the enable pin is made high. The IC will work as long as the enable pin in the IC is active low. The six other pins for the IC will be described below. These pins are used for controlling the IC directly. There are six other pins excluding the output pins. They then continue to repeat the process after the ninth output is reached. The input that comes from a timer IC will provide the timing at which the consecutive output should become high. This is the order in which they turn high one after another. Each of these 10 output pins are marked in an order. There are 10 output pins, which are from 1 to 7 and 9 to 11. The pinout for the CD4017 IC is given below.Īs we can see in the above picture, there are 16 pins in this IC.
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