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K4F640811B

Samsung
Part Number K4F640811B
Manufacturer Samsung
Description 8M x 8bit CMOS Dynamic RAM
Published Apr 25, 2005
Detailed Description K4F660811B,K4F640811B CMOS DRAM 8M x 8bit CMOS Dynamic RAM with Fast Page Mode DESCRIPTION This is a family of 8,388,6...
Datasheet PDF File K4F640811B PDF File

K4F640811B
K4F640811B

Overview
K4F660811B,K4F640811B CMOS DRAM 8M x 8bit CMOS Dynamic RAM with Fast Page Mode DESCRIPTION This is a family of 8,388,608 x 8 bit Fast Page Mode CMOS DRAMs.
Fast Page Mode offers high speed random access of memory cells within the same row.
Refresh cycle(4K Ref.
or 8K Ref.
), access time (-45, -50 or -60), package type (SOJ or TSOP-II) are optional features of this family.
All of this family have CAS-before-RAS refresh, RAS-only refresh and Hidden refresh capabilities.
This 8Mx8 Fast Page Mode DRAM family is fabricated using Samsung′s advanced CMOS process to realize high band-width, low power consumption and high reliability.
FEATURES • Part Identification - K4F660811B-JC(5.
0V, 8K Ref.
) - K4F640811B-JC(5.
0V, 4K Ref.
) - K4F660811B-TC(5.
0V, 8K Ref.
) - K4F640811B-TC(5.
0V, 4K Ref.
) • Fast Page Mode operation • CAS-before-RAS refresh capability • RAS-only and Hidden refresh capability • Fast parallel test mode capability • TTL(5.
0V) compatible inputs and outputs • Early Write or output enable controlled write • Active Power Dissipation Unit : mW Speed -45 -50 -60 8K 550 495 440 4K 715 660 605 • JEDEC Standard pinout • Available in Plastic SOJ and TSOP(II) packages • +5.
0V±10% power supply • Refresh Cycles Part NO.
K4F660811B* K4F640811B Refresh cycle 8K 4K Refresh time Normal 64ms RAS CAS W Control Clocks Vcc Vss FUNCTIONAL BLOCK DIAGRAM VBB Generator Refresh Control Refresh Counter Memory Array 8,388,608 x 8 Cells Sense Amps & I/O * Access mode & RAS only refresh mode : 8K cycle/64ms CAS-before-RAS & Hidden refresh mode : 4K cycle/64ms Refresh Timer Row Decoder Data in Buffer DQ0 to DQ7 Data out Buffer OE • Performance Range Speed -45 -50 -60 tRAC 45ns 50ns 60ns tCAC 12ns 13ns 15ns tRC 80ns 90ns 110ns tPC 31ns 35ns 40ns A0~A12 (A0~A11)*1 A0~A9 (A0~A10)*1 Row Address Buffer Col.
Address Buffer Column Decoder Note) *1 : 4K Refresh SAMSUNG ELECTRONICS CO.
, LTD.
reserves the right to change products and specifications without notice.
K4F660811B,K4F640811...


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