3-5VDC Chip Lockout Timer

Description

After the power is applied to module output pin goes high. Grounding the trigger terminal starts timer so output pin goes low. The chip cannot be repeatedly triggered, meaning that

If you continue to ground the trigger in the timed period after the chip output is low, nothing happens. Trigger refers to the instantaneous change from high level to a low level. Trigger terminal can be connected to touch switch or microcontroller IO port or other digital circuits that have a “falling” edge to effectively trigger this module. The trigger can be designed for power applications using a trigger able relay SKU-45230004

Chip Feature:

1. The use of low-power CMOS technology, lead-free and environmentally friendly.

2. Resistor adjusts timing, (8 * ohms) the timing selection, time can be adjusted from 2s-1000h. 20 turn 50K pot in series with 200 ohm can be used for R.

3. Standby output is high, trigger to ground, triggers output to low, then after the delay it goes to high.