Details

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BUY SA555N https://www.utsource.net/itm/p/57131.html
Timer

Parameter	Symbol	Min	Typical	Max	Unit
Supply Voltage	Vcc	4.5	-	16	V
Output Current (Sink)	Iol	-	200	-	mA
Output Current (Source)	Ioh	-	200	-	mA
Output Voltage (Low)	Vol	0.1	0.2	0.5	V
Output Voltage (High)	Voh	2.4	Vcc-1.5	-	V
Timing Capacitance	C	-	-	-	pF to μF
Timing Resistance	R	-	-	-	kΩ
Operating Temperature	Toper	-40	-	85	°C
Storage Temperature	Tstg	-65	-	150	°C

Instructions for Using the SA555N Timer IC:

1. Supply Voltage:

   • The SA555N can operate with a supply voltage ranging from 4.5V to 16V. Ensure that the supply voltage is within this range to avoid damage to the IC.

2. Output Current:

   • The output can sink or source up to 200mA. However, it is advisable to keep the load current below this limit to ensure reliable operation.

3. Output Voltage:

   • When the output is low, the voltage is typically between 0.1V and 0.5V.
   • When the output is high, the voltage is typically Vcc - 1.5V. For example, if Vcc is 5V, the high output voltage will be around 3.5V.

4. Timing Components:

   • The timing of the SA555N is controlled by external resistors (R) and capacitors (C). Choose appropriate values for R and C to achieve the desired timing intervals.
   • The formula for the period of oscillation in astable mode is: [ T = 0.693 times (R1 + 2R2) times C ]
   • The formula for the pulse width in monostable mode is: [ T = 1.1 times R times C ]

5. Operating Temperature:

   • The SA555N can operate over a temperature range of -40°C to 85°C. Ensure that the ambient temperature is within this range to maintain reliable performance.

6. Storage Temperature:

   • The IC can be stored at temperatures ranging from -65°C to 150°C. However, prolonged exposure to extreme temperatures may affect the performance and reliability of the IC.

7. Pin Configuration:

   • Pin 1 (GND): Ground.
   • Pin 2 (TRIG): Trigger input. A low signal here starts the timing cycle.
   • Pin 3 (OUT): Output. Drives the load.
   • Pin 4 (RESET): Reset input. A low signal here resets the timer.
   • Pin 5 (CTRL): Control voltage. Can be used to modulate the threshold and trigger levels.
   • Pin 6 (THR): Threshold input. Determines when the timing cycle ends.
   • Pin 7 (DIS): Discharge. Connects to a resistor to ground.
   • Pin 8 (Vcc): Positive supply voltage.

8. Example Circuit:

   • For an astable multivibrator, connect:
     • Pin 2 to Pin 6 through a capacitor (C).
     • Pin 7 to Pin 6 through a resistor (R1).
     • Pin 7 to Vcc through another resistor (R2).
     • Pin 3 to the load.
   • For a monostable multivibrator, connect:
     • Pin 2 to the trigger input.
     • Pin 6 to Vcc.
     • Pin 7 to Pin 2 through a resistor (R).
     • Pin 7 to ground through a capacitor (C).
     • Pin 3 to the load.

By following these guidelines, you can effectively use the SA555N timer IC in various applications such as oscillators, timers, and pulse generators.

(For reference only)