Functional Block Diagram Of Ic 555 Timer. In the 555 timer block or functional diagram comparators are those devices which output is high when their positive input voltage is greater than their negative input voltage and vise versa. Let me tell you a fact about why 555 timer is called so the timer got its name from the three 5 kilo ohm resistor in series employed in the internal circuit of the ic.
The functional parts of the 555 timer ic consist of a flip flop a voltage divider and a comparator. The ic 555 uses three resisters of 5kω therefore the name is given as ic555. 8 power or vcc pin 1.
Refer block diagram of 555 timer ic given above.
Either i monostable one shot multivibrator or ii astable free running multivibrator. The resistive network contains three equal resistors which will act as a voltage driver. The ic 555 uses three resisters of 5kω therefore the name is given as ic555. Schematic working principle of 555 timer ic.
