Details

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BUY NE556D https://www.utsource.net/itm/p/11658218.html

Parameter	Symbol	Min	Typical	Max	Unit
Supply Voltage	Vcc	4.5	-	16	V
Operating Temperature	Temp	-40	-	85	掳C
Output Current (Sink)	Ios	10	-	100	mA
Output Current (Source)	Ios	10	-	100	mA
Propagation Delay Time	tpd	-	1.2	2.5	渭s
Maximum Power Dissipation	Pd	-	700	-	mW
Input Trigger Current	Itr	0.1	-	0.5	渭A
Reset Input Current	Irs	0.1	-	0.5	渭A
Control Voltage Range	Vc	2	-	Vcc-1	V

Instructions for Using the NE556D

1. Power Supply:

   • Connect the positive 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. Timing Capacitors:

   • Connect timing capacitors (C1 and C2) between pins 5 and 6 (for the first timer) and pins 11 and 12 (for the second timer) respectively.
   • Choose appropriate capacitor values based on the desired timing intervals.

3. Resistors:

   • Connect resistors (R1 and R2) in series with the timing capacitors to control the charging and discharging times.
   • For accurate timing, use precision resistors and capacitors.

4. Trigger Inputs:

   • Apply trigger signals to pins 2 (for the first timer) and 9 (for the second timer).
   • The trigger input should be a negative-going pulse that drops below 1/3 Vcc.

5. Threshold Inputs:

   • Connect threshold inputs to pins 3 (for the first timer) and 10 (for the second timer).
   • The threshold input should be a positive-going pulse that rises above 2/3 Vcc.

6. Reset Inputs:

   • Connect reset inputs to pins 4 (for the first timer) and 15 (for the second timer).
   • A high signal on the reset input will reset the timer.

7. Output:

   • The output from the first timer is available at pin 6, and the output from the second timer is available at pin 13.
   • The output can drive loads up to 100mA.

8. Control Voltage:

   • If using the control voltage input, connect it to pin 5 (for the first timer) and pin 11 (for the second timer).
   • The control voltage can be used to adjust the timing characteristics of the timer.

9. Decoupling Capacitors:

   • Place a 0.1渭F ceramic capacitor between Vcc and GND close to the IC to reduce noise and improve stability.

10. Handling Precautions:

    • Handle the NE556D with care to avoid static damage.
    • Ensure all connections are secure and correct to prevent damage to the IC.

By following these instructions, you can effectively use the NE556D dual timer IC in your projects.

(For reference only)