Verified answer

One, and it doesn't even need to be a .50 BMG round either.

An EOD Suit (Explosive Ordinance Suit) isn't really designed to repel bullets. They're equivalent to Type I or Type II/IIA body armor, which can be resistant up to service caliber handguns like 9mm or 38 special.

Even the tougher suits wouldn't stand up well to even 357 mag or 44 mag handgun fire.

FYI: Even a guy in a top of the line soft body armor suit wouldn't survive a hit from something like a Barett in 50BMG. There's just too much impact energy there, even with a regular, jacketed lead bullet.

If you want a suit that protects against 50 BMG, consider wearing an APC.