Details

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BUY NE558N https://www.utsource.net/itm/p/12382666.html

Parameter	Symbol	Min	Typical	Max	Unit
Supply Voltage	Vcc	4.5	-	16	V
Quiescent Current (per timer)	Iq	3	5	10	mA
Output Current (Sink)	IOL	200	-	-	mA
Output Current (Source)	IOH	-	-	100	mA
Output Voltage (Low)	VOL	0.25	0.4	0.75	V
Output Voltage (High)	VOH	3.3	-	Vcc-1.5	V
Trigger Input Voltage	Vtr	1/3Vcc	-	2/3Vcc	V
Threshold Input Voltage	Vth	2/3Vcc	-	-	V
Reset Input Voltage	Vr	0.7	-	Vcc	V
Temperature Range	T	-40	-	85	°C

Instructions for NE558N:

1. Power Supply:

   • Connect the supply voltage (Vcc) to pin 14 and ground (GND) to pin 7.
   • Ensure the supply voltage is within the range of 4.5V to 16V.

2. Trigger Input (Pin 2):

   • Apply a low pulse (less than 1/3 Vcc) to trigger the timer.
   • Use a capacitor and resistor in series to create a timing circuit.

3. Threshold Input (Pin 6):

   • Connect the threshold input to the same capacitor as the trigger input to control the timing.
   • The threshold voltage should be set to 2/3 Vcc for proper operation.

4. Discharge Pin (Pin 7):

   • This pin is used to discharge the timing capacitor.
   • It can be connected directly to the capacitor to ground.

5. Reset Input (Pin 4):

   • Apply a high signal (greater than 0.7V) to reset the timer.
   • If not used, connect it to Vcc to prevent accidental resets.

6. Control Voltage (Pin 5):

   • This pin can be used to adjust the threshold and trigger levels.
   • If not used, connect it to ground through a 10nF capacitor to stabilize the internal comparator.

7. Output (Pin 3):

   • The output can sink up to 200mA and source up to 100mA.
   • Use external transistors or drivers for higher current applications.

8. Operating Temperature:

   • Ensure the device operates within the temperature range of -40°C to 85°C.

9. Layout Considerations:

   • Keep the power supply lines short and use decoupling capacitors (e.g., 100nF) close to the Vcc and GND pins to reduce noise.

10. Testing:

    • Test the NE558N by applying a trigger pulse and measuring the output waveform with an oscilloscope to ensure correct timing and functionality.

(For reference only)