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There multiple kinds of counters which we can use in devices for binary or decimal counting. The IC 74LS93 counts from to in binary which is 0 to 15 in decimal. In decimal, we only need 0 to 9 which covers all the possible values of decimal without giving any extra value. To solve this issue, we use an IC name 74LS The counter starts counting from to and then it resets the value again.

The automatic reset makes the counter to start from 0 and end at 9 in decimal. In IC we have four reset pins from which we can enable the counter by activating specific two pins.

In this section working of will be explained. There are two clock pins and they will be used to change the output state. The reset pins are control through AND gate. The IC comes with 4 reset pins, two clock, and 4 output pins. When we are going to use the IC then we need to understand the reset pins first. These four reset pins will be used to control the output. These four reset pins will come up with multiple 16 combinations but in some combinations, there will be fixed output.

The First clock pin Pin 14 will be used to give the clock input signal to the IC. But always keep in mind the concept about the reset pins otherwise IC will give some random value or there will be no output. Here the full functional circuit. Whenever we give the pulse the IC will give the output in binary form. Every binary form will represent a decimal number. IC 74LS90 can be used as a simple counter but its value always comes in binary.

Here we will use the IC as a counter and then we will show it on the 7-segment. You can also use 74LS Here we grounded all the reset pins because we just want to count and we have no intention with the IC to perform any other function. The single IC can only count up to 9 but we can use multiple ICs to count further. In the case of multiple decimal counting , we can use others IC and its method. We always need to come up with self-made solutions with other gates to use the IC as counting more than 9 with 74LS Whatever will be the value either 0 or 1, it will not affect the output.

Notify me of follow-up comments by email. Notify me of new posts by email. Table of Contents. Vcc is available by default in proteus. Pin 2 is used as a reset pin in the IC. It will show the maximum value on the output. It will use with the Pin 3. Pin 3 is also used as a reset pin in the IC. It will use with Pin 2. Pin 9 is also an output pin.


74LS90 Decade Counter Pinout and Examples

We use Cookies to give you best experience on our website. By using our website and services, you expressly agree to the placement of our performance, functionality and advertising cookies. Please see our Privacy Policy for more information. Both the l 1 cycle , 74LS90 must be a digital circuit. Abstract: IC pin configuration ic circuit diagram IC ic pin diagram function of ic pin diagram of ic function of Set and Reset in ic LS IC pin configuration diagram Text: d in g sta g e s, th e d e v ic e m ay be o p e ra te d in va rio u s c o u n tin g m o de s. Both the , 74LS90 must be a digital circuit. If decimal point position correction is required see following.


National Semiconductor


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