Monostable Multivibrator by 4538
CD4538 is a dual Monostable Multivibrator. The pdf data sheet is here.
When you trigger the chip the output sends off one single pulse or one high-low event, like the pulse below.
The T+ pin 4 of U1a is the positive edge trigger or raising edge trigger input, the T- pin 5 is falling edge or negative edge trigger input.
Now see the image of the single pulse above which shows both the edges, If this is the input pulse at pin 5 then the falling edge turns the output pin 6 from low to high, this output remains high for time T = R2 * C1 and then goes low again, The output Q at pin 6 also looks like the image of pulse above. The Output pin 7 is the complementary state of pin 6, it is the reverse state or inverted form of pin 6 output.
Read More Source by Mr Anantha Narayan
http://schematics.blogspot.com/2004/11/monostable-multivibrator.html
Thank you.
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