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Unbuffered SODIMM datasheet DDR3 SDRAM
Rev. 1.0
[ Table 15 ] DDR3-1333 Speed Bins
Speed DDR3-1333
Units NOTECL-nRCD-nRP 9 -9 - 9
Parameter Symbol min max
Internal read command to first data tAA
13.5
(13.125)
8
20 ns
ACT to internal read or write delay time tRCD
13.5
(13.125)
8
- ns
PRE command period tRP
13.5
(13.125)
8
- ns
ACT to ACT or REF command period tRC
49.5
(49.125)
8
- ns
ACT to PRE command period tRAS 36 9*tREFI ns
CL = 5
CWL = 5 tCK(AVG) 3.0 3.3 ns 1,2,3,4,6,9,10
CWL = 6,7 tCK(AVG) Reserved ns 4
CL = 6
CWL = 5 tCK(AVG) 2.5 3.3 ns 1,2,3,6
CWL = 6 tCK(AVG) Reserved ns 1,2,3,4,6
CWL = 7 tCK(AVG) Reserved ns 4
CL = 7
CWL = 5 tCK(AVG) Reserved ns 4
CWL = 6 tCK(AVG) 1.875 <2.5 ns 1,2,3,4,6
CWL = 7 tCK(AVG) Reserved ns 1,2,3,4
CL = 8
CWL = 5 tCK(AVG) Reserved ns 4
CWL = 6 tCK(AVG) 1.875 <2.5 ns 1,2,3,6
CWL = 7 tCK(AVG) Reserved ns 1,2,3,4
CL = 9
CWL = 5,6 tCK(AVG) Reserved ns 4
CWL = 7 tCK(AVG) 1.5 <1.875 ns 1,2,3,4,8
CL = 10
CWL = 5,6 tCK(AVG) Reserved ns 4
CWL = 7 tCK(AVG) Reserved ns 1,2,3
Supported CL Settings 5,6,7,8,9 nCK
Supported CWL Settings 5,6,7 nCK