The requested file:
https://pdf.datasheetcatalog.com/datasheets2/16/165171_1.pdf
is the data sheet for the following electronic components:

Winbond Electronics

#	Part Name	Description
1	W27C512-12	64K X 8 ELECTRICALLY ERASABLE EPROM
2	W27C512-45	64K X 8 ELECTRICALLY ERASABLE EPROM
3	W27C512-70	64K X 8 ELECTRICALLY ERASABLE EPROM
4	W27C512-90	64K X 8 ELECTRICALLY ERASABLE EPROM
5	W27C512P-12	64K X 8 ELECTRICALLY ERASABLE EPROM
6	W27C512P-45	64K X 8 ELECTRICALLY ERASABLE EPROM
7	W27C512P-70	64K X 8 ELECTRICALLY ERASABLE EPROM
8	W27C512P-90	64K X 8 ELECTRICALLY ERASABLE EPROM

Select the part name and then you can download the datasheet in PDF format.