Features:
1.Adopting CMOS technology with low power consumption and lead-free environmental protection.
2.Low level output can directly push LED (please add current limiting resistor), and high level output can push transistor (please add current limiting resistor).
3.The resistor can be used to adjust the timing time, with 8 * N (N=0.12.3) times the timing selection, and the time can be adjusted from 2s-1000h.
4.Trigger timing and trigger terminal grounding and powering on timing can be selected.
5.The standby output is high level, and the falling edge is triggered. After triggering, the output is low level, and the high level is restored after the delay ends.
Parameters:
Function and Design Description:
1. Connect the circuit as required and set the time resistance and power supply voltage;
2. The output terminal is at a high level before being powered on and triggered;
3. The “falling edge” trigger at the triggering end is effective, and after triggering, the output end immediately becomes low level and the circuit starts timing;
4. After the set timing time expires, the output terminal returns to high level and waits for the next “falling edge” to trigger;
5. The chip is non repetitive triggered, meaning that if it continues to be triggered during the low level output period of the chip after triggering, the trigger is invalid;
6. The “falling edge” trigger at the trigger end refers to the moment of change from a high level to a low level;
7. Generally, high level refers to VCC voltage, while low level refers to 0-0.3v or GND, as long as it meets the requirements of this level;
8. The triggering end can be effectively triggered by lightly touching the switch, microcontroller IO port, or other digital circuits that generate a “falling edge” to the ground;
9. Can be designed as a power on trigger, simply short circuit the trigger end to ground, and power on will be triggered. After the time has passed, the output will return to a high level and wait for the next one
The falling edge is triggered again.
Pin Description:
The following figure is counted from bottom to top: PIN1=negative power supply, PIN2=triggered, PIN3=output, PIN4=positive power supply
The timing time of P1 short circuit (two small pads short circuit) in the following figure is equal to the time in the resistance meter multiplied by 8 times
The timing time of P2 short circuit (two small pads short circuit) in the following figure is equal to the time in the resistance meter multiplied by 64 times
The timing time for simultaneous short-circuit of P1 and P2 in the following figure (short circuit of two small pads) is equal to the time in the resistance meter multiplied by 512 times
Package include:
1 pcs installation: chip * 1
10pcs package: chip * 10
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