If you are using the YL105 datasheet to repair a device, keep these points in mind:
Controlling multi-speed settings or sleep timers. yl105 datasheet
Use an oscilloscope or multimeter to see if Pin 6 (Output) toggles when the input trigger is activated. If the input changes but the output stays dead, the IC is likely fried. Conclusion If you are using the YL105 datasheet to
Sets the operational logic (High/Low trigger). yl105 datasheet
Most commonly found in SOP-8 (Surface Mount) or DIP-8 (Through-hole) configurations. Pinout Configuration
Often used for manual override or left unconnected. VSS: Common return path. Common Applications