10/11/2023 0 Comments Download free 555 timer pinout![]() ![]() You can vary it from 45% to 90% of the supply voltage. You can control the threshold voltage (pin 6) through the control input (which is internally set to 2/3 the supply voltage). This input should remain connected to Vcc when not used. The output can source or sink up to 200 mA (maximum depends on supply voltage).Ī low voltage (less than 0.7V) applied to the reset pin will cause the output (pin 3) to go low. ![]() For example, if the supply voltage is 5V output high voltage will be 3.3 volts. In output high state the voltage will be 1.7V lower than the supply voltage. In output low state the voltage will be close to 0V. The output will remain high until a high voltage is applied to the Threshold input (pin 6). Pin 1 – Ground (GND) This pin is connected to circuit ground.Ī low voltage (less than 1/3 the supply voltage) applied momentarily to the Trigger input causes the output (pin 3) to go high.
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