Not a data sheet, but I found this - https://www.520101.com/html/circuitry/175322585.html
There's not much info it seems!
For questions about component-level electronic circuits, tools and equipment.
1: Be nice.
2: Be on-topic (eg: Electronic, not electrical).
3: No commercial stuff, buying, selling or valuations.
4: Be safe.
Not a data sheet, but I found this - https://www.520101.com/html/circuitry/175322585.html
There's not much info it seems!
thanks atleast some thing to look into , may be this is a copy of some common timer ic . wont know unless i get a data sheet.
It also mentions the RS6445C. Here is a little more information in the English.
thanks i should i am checking it out , also i got this timer , in the st3p timer as the link mentions