Details

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BUY NE555-SMD https://www.utsource.net/itm/p/12608865.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	Vcc		4.5	7.5	16	V
Supply Current	ICC	No load	-	3	-	mA
Output Current (Sink)	IOL	Vo = 0.4V	200	-	-	mA
Output Current (Source)	IOH	Vo = Vcc-1.7V	-	100	-	mA
Trigger Input Current	ITR	Vtr = 1V	0.1	-	-	渭A
Threshold Input Current	ITH	Vth = Vcc-1V	0.1	-	-	渭A
Reset Input Current	IRST	Vrst = 1V	0.1	-	-	渭A
Control Voltage Range	Vcon		2	-	Vcc	V
Maximum Output Voltage	Vomax		-	Vcc-2	-	V
Minimum Output Voltage	Vomin		-	0.25	-	V

Instructions for NE555-SMD:

1. Power Supply Connection:

   • Connect the supply voltage (Vcc) between pin 8 and ground (pin 1). Ensure Vcc is within the specified range to avoid damage.

2. Trigger Input (Pin 2):

   • This pin triggers the timer when the voltage falls below 1/3 of Vcc. Use a capacitor or switch to ground for triggering.

3. Threshold Input (Pin 6):

   • When the voltage at this pin exceeds 2/3 of Vcc, it resets the internal flip-flop. Typically connected to a resistor-capacitor network.

4. Discharge Pin (Pin 7):

   • Connect this pin to discharge capacitors or control other components. It is internally connected to ground when the output is low.

5. Control Voltage (Pin 5):

   • Provides a way to modify the threshold voltages externally. Can be bypassed with a capacitor to ground for noise immunity.

6. Reset Input (Pin 4):

   • A low signal on this pin will reset the timer regardless of other inputs. Leave open or connect to Vcc if not used.

7. Output (Pin 3):

   • The output can source or sink current up to its limits. Use appropriate external components to drive loads like LEDs, relays, etc.

8. Ground (Pin 1) and Vcc (Pin 8):

   • Essential connections for power supply. Always ensure these are correctly wired.

9. Operating Temperature:

   • Ensure the operating temperature is within the rated range (-40掳C to +85掳C) for reliable operation.

10. Mounting and Handling:

    • Handle the SMD package carefully to avoid damage. Follow standard SMD soldering procedures for mounting on PCBs.

(For reference only)