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TSB81BA3E, which one?

Hey mates. I've got a chip on my UAD Apollo Quad audio interface, which I suspect was short circuited due to an accidental upside down connection into my pci-e firewire 800 port
I'm looking to replace this chip with a new one but I'm confused as which to purchase/sample.
I've got a picture here:
  

thanks for the help guys. Cheers