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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
Probably an analog devices 844 opamp
