Part source MB90611A LQFP100

[Cozzmo]

I am repairing a unit that is used to test vending machine coin mechanisms. A faulty coin mechanism was plugged in blowing up the transistors which seems to be kind of common. I have repaired several before. This time the transistors held together burned tracks on the board and the main CPU on the daughterboard let out a heap of smoke but no trace damage on the daughterboard.

I repaired / removed the faults and the base board works with another CPU, but I need to replace the chip. I have tried 2 companies from google searching so far and both say they have stock until an order is placed then no stock. One seller on eBay lists for $120 each, which is out of the budget. AU$50 Max I’m willing to gamble on this.

** Must be square LQFP package not rectangular QFP. ** any help appreciated.

[MDBSolution]

Hi. Does your device communicate via serial MDB? If so I make MDB simulators and testers that you could use to test coin mechs., validators, etc. Contact me at info@mdbtools if interested.

[amyk]

That's a mask ROM MCU... and with what looks like no ROM identification marking, you are likely out of luck.

[Pete66]

around $15 on Ali Express
He says he has 9,999 pieces available.  No feedback you are taking a chance but that's all there is

Link:
https://www.aliexpress.com/item/4000062474414.html?spm=a2g0o.productlist.0.0.671f61c96PQkeo&algo_pvid=7c73e988-7db8-4112-beb9-1db3a9f4cbdc&algo_expid=7c73e988-7db8-4112-beb9-1db3a9f4cbdc-0&btsid=0bb0623116225297620888275ea0c4&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_