200 x 200 tiles?
That's like 40000 sprites, even if they were 1 pixel that would be way too much, especially since its animated.
There is no set amount you can have since pc specs will vary for your players, but once you get into the thousands there will be some issues.
Anyway I think the limits would be anywhere from 7000 to 20000 based on size.
But you should really start think about much smaller maps. Maxing out your ram with a background wont help much with game play.