74LS14 DATASHEET PDF

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Pin 1 will be used as the input pin for the first Schmitt trigger. The rise and fall time for IC describe how much time IC will take to give the new output. Here in 74LS14 IC, the output will be change within 12ns. Here we are using the inverter Schmitt trigger so If the input voltages are lower or equal to the hysteresis voltages then the output will be HIGH and after 12ns if the voltages changes then at the end of 12 ns the output will depend on the input signal again, this cycle continues until we stop the circuit.

Digital, Sin wave and noisy sine wave. Here we will learn how each signal will be handled by the IC. First, use the sign wave as the input signal.

When the input signal will be at peak then the output will at LOW and when input will be at lower the threshold then the output will be at its peak in IC. The same will happen with a slow edge signal. First, we will understand what should be the output. When we will give the sign wave to the inverter then the first output will be in digital form and second its output will depend on the input signal frequency.

If the signal is changing with faster frequency then we will receive multiple square waves in the specific interval. Here I will use 50 Hz and see what is the output and how much waves we are getting. First, design the circuit as shown in the below image. It is because the speed of the IC remains constant but when we change the frequency the frequency starts shifting much faster than before that we start receiving two times change in frequency from peak to low and low to peak within 1ms.

This example will go the same for a smooth edge signal but we can understand noise immunity here better. Here we can see the shift of the sign wave increase due to the change in frequency.

This gives the noisy signal and the upper hand. It has wide use in Power meter and Power analyzers. Digital input modules also use 74LS14 for factory automation. In outdoor units of Air conditions for residential ductless also comes up with 74LS The IC can be used for Noise Removing.

It can also be used as a Dead band Filter. It can be operated with a very slow change in amplitude. It can be used as a noise impunity device. The device comes in two-level hysteresis voltages, the low hysteresis voltages are 0. The Max output current for IC is 8.

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