The requested file:
https://pdf.datasheetcatalog.com/datasheet_pdf/samsung-electronic/KM41256AJ-10_to_KM41256AZ-15.pdf
is the data sheet for the following electronic components:

Samsung Electronic

#	Part Name	Description
1	KM41256AJ-10	256K x 1-bit DRAM, 100ns
2	KM41256AJ-12	256K x 1-bit DRAM, 120ns
3	KM41256AJ-15	256K x 1-bit DRAM, 150ns
4	KM41256AP-10	256K x 1-bit DRAM, 100ns
5	KM41256AP-12	256K x 1-bit DRAM, 120ns
6	KM41256AP-15	256K x 1-bit DRAM, 150ns
7	KM41256AZ-10	256K x 1-bit DRAM, 100ns
8	KM41256AZ-12	256K x 1-bit DRAM, 120ns
9	KM41256AZ-15	256K x 1-bit DRAM, 150ns

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