http://www.loadparts.com/Catalog/t/5725.asp

TC57H1000AD
TC57H1000
57H1000AD
TC57H1000AD   TOS     17   Datasheet   Cross Part  

Alternate Parts (cross reference Parts) 
27C010 | 27C040 | 27C100 | 27C210 | 27C240 | 
27C256 | 27C400 | 27C512 | 27C800 | AM27C010 |