## What is the pin out for the 555 timer IC?

Pinout

555 pin# 556:1st pin# Pin name
1 7 GND
2 6 TRIGGER
3 5 OUTPUT
4 4 RESET

## What is the function of IC 555 Pin No 8?

Pin-8 is the voltage supply pin which is used to supply the voltage to the IC with respect to the ground terminal.

How much voltage can a 555 timer take?

The standard TTL 555 can operate from a supply voltage between 4.5 volts and 18 volts, with its output voltage approximately 2 volts lower than its supply voltage VCC. The 555 can source or sink a maximum output current of 200mA, (but it may get hot at this level), so the circuit variations are unlimited.

### What is duty cycle of 555 timer?

The duty cycle in a 555 integrated circuit (IC) is the percentage of time that the output is high for each cycle of the square wave. For example, if the total cycle time is 1 s and the output is high for the first 0.4 s of each cycle, the duty cycle is 40%.

### How many pins does IC 555 consist of?

8-pins
The 555 timer IC consist of 8-pins where each pin has some function. The pin configuration of this IC is shown below. Pin-1 is a GND pin which is used to supply a zero voltage to the IC.

How to control duty cycle of a 555 timer?

Solving for t off gives a familiar relation for the 555 timer in astable mode. As we have seen, applying a voltage to pin 5 will change the duty cycle and period by changing the amount of time the output is high while the amount of time the output is low is constant.

## What are the inputs and outputs of a 555 timer?

Figure 1 shows the input and output signals of the 555 timer as they are arranged around a standard 8 pin dual inline package (DIP). Pin 1 – Ground (GND) This pin is connected to circuit ground. A low voltage (less than 1/3 the supply voltage) applied momentarily to the Trigger input causes the output (pin 3) to go high.

## Which is the discharge pin on a 555 timer?

Pin 7 (Discharge) – This pin is an open collector output which is in phase with the main output on pin 3 and has similar current sinking capability. Pin 8 (V +) – This is the positive supply voltage terminal of the 555 timer IC.

What is the operating voltage of a 556 timer?

Supply-voltage operating range is +4.5 volts (minimum) to +16 volts (maximum). The pin connections for the 556 which is a dual 555 timer (2 in one package) are shown in table below. For example, the two outputs for the two timers of the 556 are on pins 5 and 9 which correspond to the output pin 3 of the 555.