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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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EM44DM0888LBA 데이터시트(PDF) 13 Page - Eorex Corporation |
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EM44DM0888LBA 데이터시트(HTML) 13 Page - Eorex Corporation |
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13 / 29 page  EM44DM0888LBA Feb. 2012 13/29 www.eorex.com AC Operating Test Characteristics (Continued) (VDD=1.8V±0.1V) Symbol Parameter -187 (DDR2-1066) -25 (DDR2-800) Units Min. Max. Min. Max. tRPST Read Postamble 0.4 0.6 0.4 0.6 tCK tRAS Active to Precharge command period 45 70k 45 70k ns tRC Active to Active command period 57.5 - 57.5 - ns tRFC Auto Refresh Row Cycle Time 127.5 - 127.5 - ns tRCD Active to Read or Write delay 12.5 - 12.5 - ns tRP Precharge command period 12.5 - 12.5 - ns tRRD Active bank A to B command period 7.5 - 7.5 - ns tCCD Column address to column address delay 2 - 2 - tCK tWR Write recover time 15 - 15 - ns tDAL Auto precharge write recovery + precharge time tRP + tWR - tRP + tWR - ns tXARD Exit active power-down mode to read command (fast exit) 3 - 2 - tCK tXARDS Exit active power-down mode to read command (slow exit) 10-AL - 8-AL - tCK tXP Exit precharge power-down to any non-read command 3 - 2 - tCK tWTR Internal write to read command delay 7.5 - 7.5 - ns tRTP Internal read to precharge delay 7.5 - 7.5 - ns tXSNR Exit self Refresh to non-read command tRFC +10 - tRFC +10 - ns tXSRD Exit self Refresh to read command 200 - 200 - tCK tREFI Average periodic refresh interval - 7.8 - 7.8 us tCKE CKE minimum pulse width 3 - 3 - tCK tFAW Four active to Row active delay (same bank) 35 35 ns tOIT OCD drive mode output delay 0 12 0 12 ns |
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