MC-45D16CB641 Datasheet, PDF (9/16 Pages) NEC – 16 M-WORD BY 64-BIT DDR SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE

Asynchronous Characteristics
Parameter
Symbol
-C75 (PC266B)
-C80 (PC200)
Unit
MIN.
MAX.
MIN.
MAX.
ACT to REF/ACT command period (operation)
tRC
65
70
ns
REF to REF/ACT command period (refresh)
tRFC
75
80
ns
ACT to PRE command period
tRAS
45
120,000
50
120,000
ns
PRE to ACT command period
tRP
20
20
ns
ACT to READ/WRITE delay
tRCD
20
20
ns
ACT(one) to ACT(another) command period
tRRD
15
15
ns
Write recovery time
tWR
15
15
ns
Auto precharge write recovery time + precharge time
tDAL
35
35
ns
Mode register set command cycle time
tMRD
15
15
ns
Exit self refresh to command
tXSNR
75
80
ns
Refresh time (4,096 refresh cycles)
tREF
64
64
ms
Preliminary Data Sheet E0034N10
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