I believe it's a timer 555 or op-amp it's a part of my car Flash relay...
unfortunately i can't make exact identification because my knowledge are
limited. the cirquit has one electrolytic capacitor i think 22μF and 2-3 resistors one of them has high enough resistance i think megaohm..
if it is timer IC i'll try to repair it...no need to buy new relay because i have
spare some 555
I have not found the part but I think the TFK prefix stands for Telefunken and they produced some specialized automotive ics either under their own name or Temic which they own.
An example of the sort of chips they do is this car light flasher datasheet: http://www.tranzistoare.ro/datasheets/208/303604_DS.pdf
Based on finding a few more of these datasheets by searching for Telefunken automotive in Google I would say that it is a special chip.
I believe it's a timer 555 or op-amp it's a part of my car Flash relay...
unfortunately i can't make exact identification because my knowledge are
limited. the cirquit has one electrolytic capacitor i think 22μF and 2-3 resistors one of them has high enough resistance i think megaohm..
if it is timer IC i'll try to repair it...no need to buy new relay because i have
spare some 555
when you press a button or when the head lights of opposite car is identified, this circuit flashes HIGH beam once and goes back to LOW beam of head lights is it-- may we call it monoshot?
Sarma
The IC probably has been identified by picasm...
The code U644B reminds me something...most ICs have 2 lines of code
and i only looked at the first one, as most chips are identified by that. I'll check it
tomorrow and i'll tell you.