What is this TI component?

Discussion in 'General Electronics Chat' started by jb0x2d1, Apr 5, 2013.

  1. jb0x2d1

    Thread Starter New Member

    Apr 5, 2013
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    [​IMG]What in the world is this TI component (bottom right corner)? It clearly has a TI mark on it but I've searched ti.com and elsewhere and I can't find anything on it.

    [​IMG]
    http://tinypic.com/r/o8xt0y/6

    Thanks
    [​IMG]
     
  2. timescope

    Member

    Dec 14, 2011
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    It could be an ASIC ,application specific integrated circuit. What application is the board used in and what do the push buttons do ?

    Timescope
     
  3. jb0x2d1

    Thread Starter New Member

    Apr 5, 2013
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    It is the keychain fob to my car. The buttons unlock, lock, trunk and panic.
     
  4. absf

    Senior Member

    Dec 29, 2010
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    I'd guess it's a RF remote control of some sort (315 MHz may be)...

    Any printed coils on the flip side of the PCB?

    Allen

    [edit] Oops! I am typing too slowly.
     
    Last edited: Apr 5, 2013
  5. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    The coil ( matsushita / Panasonic) is in the upper right 315Mhz.

    The chip is a rolling code security chip to mate with the vehicle and send the appropriate digital signal sequence to the receiver in the vehicle. It is an application-specific chip and you will not likely find a replacement.
     
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  6. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    It will just be a TI 14 pin microcontroller, probably a 430 series, with application specific code and code protected.

    You won't be able to buy one.
     
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  7. MrChips

    Moderator

    Oct 2, 2009
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    Yes, the first thing to do is to trace where PWR and GND are connected.
    Is PWR on pin-1 and GND on pin-14?
     
  8. jb0x2d1

    Thread Starter New Member

    Apr 5, 2013
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    I don't know much about this stuff but I know enough to ask this: if I start poking around with my multimeter reading resistance in order to determine which pins go where, do I risk damaging anything (assuming it isn't damaged already)? There is only so much I can see.
     
  9. MrChips

    Moderator

    Oct 2, 2009
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    I think the point is this is a customized chip and you will not be able to to purchase it.
    You may be able to reverse engineer the circuit and find a microcontroller from TI that matches the pinout. But you will still need to program the chip to the right specifications which is no easy task.
     
  10. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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    Last edited: Apr 6, 2013
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