MC-458CB64ESB Datasheet, PDF (9/16 Pages) NEC – 8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE SO DIMM

MC-458CB64ESB, 458CB64PSB
Asynchronous Characteristics
Parameter
Symbol
-A 10B
Unit
MIN.
MAX.
REF to REF/ACT command period
tRC
ACT to PRE command period
tRAS
PRE to ACT command period
tRP
Delay time ACT to READ/WRITE command
tRCD
ACT(0) to ACT(1) command period
tRRD
Data-in to PRE command period
tDPL
Data-in to ACT(REF) command /CAS latency = 3
tDAL3
period (Auto precharge)
/CAS latency = 2
tDAL2
Mode register set cycle time
tRSC
Transition time
tT
Refresh time (4,096 refresh cycles)
tREF
90
60
30
30
20
10
1CLK+30
1CLK+30
2
1
120,000
30
64
ns
ns
ns
ns
ns
ns
ns
ns
CLK
ns
ms
Note
Data Sheet M12263EJAV0DS00
9