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

Asynchronous Characteristics
Parameter
Symbol
-A 10B
Unit
MIN.
MAX.
REF to REF/ACT command period
ACT to PRE command period
tRC
90
ns
tRAS
60
120,000
ns
PRE to ACT command period
tRP
30
ns
Delay time ACT to READ/WRITE command
tRCD
30
ns
ACT(0) to ACT(1) command period
tRRD
20
ns
Data-in to PRE command period
tDPL
10
ns
Data-in to ACT(REF) command /CAS latency = 3
tDAL3
1CLK+30
ns
period (Auto precharge)
/CAS latency = 2
tDAL2
1CLK+30
ns
Mode register set cycle time
tRSC
2
CLK
Transition time
tT
1
30
ns
Refresh time (4,096 refresh cycles)
tREF
64
ms
Note
Data Sheet E0068N10
9