Re: Please help me to identify this TO220-22 IC Chip for BMW TCM. Thanks !!!

On Thu, 21 Jun 2007 11:58:13 -0700, virtualgarage
<virtualgarage@xxxxxxxxx> put finger to keyboard and composed:

So far, as I know, this TO220-22 with a symbol and 080 00005 1183 692
has quadri- open collector drivers to 4 external solenoids.

This chip is used on a transmission control module dated 1988/4 for
BMW vehicle, as image below.

I have been browsing internet for over 3 days now without any luck so
far. I can NEVER find the TO220 with 22 pin! It looks to me like a PWM
solenoid driver but just my guess. There is 23 holes on the PCB as
you may see in this picture but only has 22 pin counts on this chip.

I need to find out the pin definition and data***. For a quadri-
drivers, I cann't understand why they have 22pin counts? Let us prove
how usenet can enlighten people!

If anyone knows about any information, please kindly let me know.

http://bimmerboard.com/members/1988bmw750il/original/whatchip.jpg

Whenever I reverse engineer automotive electronics, I start at the
connector and work inwards.

The 6 caps nearby would suggest 6 drivers with 3 pins per driver plus
power and ground pins (???). Look for any symmetry.

If the problem is limited to one driver, then you may be able to
substitute a single discrete driver at the rear of the heatsink.

- Franc Zabkar
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