Is the MAX4638ETP+ version available? It appears in the product data sheet but not in Maxim's storefront.
Answer:
No, this package type, the 20 pin TQFN-EP, has not been manufactured due to the popularity of the other available MAX4638 package types, i.e., 16 pin TQFN-EP, 16 TSSOP, and 16 pin SOIC.