Looking for datasheet of ST M9905024 chip from a remote

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tgq

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ST M9905024 ??

found this chip in remote control
it seems to be like the MC145026 but has 20 pins instead of 16
cant find datasheet, i need to clone this remote
anyone can help ?
thanks
 

Re: ST M9905024 ??

Hi.
Here is the ST site:

**broken link removed**

Miguel
 

Re: ST M9905024 ??

hi Externet
when i say "cant find datasheet" that means i already connect to st.com (and other chipdir and so on) and try partsearch :?
i think its the same chip but i need coccordance betweem 16 and 20 pin package
 

Re: ST M9905024 ??

Hello tgq.
Yes, I was surprised the ST site did not show anything; unless it is a custom made chip for a customer. In that case they will never list it as is produced solely for a private party and subject to copyrights.
If the logo ST is not exactly as the ST.com shows, it could be made at any chinese kitchen and becomes more difficult to trace.
Miguel
 

Re: ST M9905024 ??

ok externet
i connected the scope on 'a' pin to see pulses, they are exactly in the 145026 timings and the dip-switch are also 3 position
the difference seems to be for the clock generation (only 1R + 1C)
so i'm going to clone it with a 153056 (and its more complicated RC network) and thats all
thanks anyway
 

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