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DTM64360B Datasheet(PDF) 7 Page - List of Unclassifed Manufacturers |
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DTM64360B Datasheet(HTML) 7 Page - List of Unclassifed Manufacturers |
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7 / 13 page  DTM64360B 2GB - 240-Pin 1Rx8 Registered ECC DDR3 DIMM Document 06943, Revision A, 3-Oct-11 Dataram Corporation 2011 Page 7 AC Operating Conditions PARAMETER Symbol Min Max Unit Internal read command to first data tAA 13.125 20 ns CAS-to-CAS Command Delay tCCD 4 - tCK Clock High Level Width tCH(avg) 0.47 0.53 tCK Clock Cycle Time tCK 1.5 1.875 ns Clock Low Level Width tCL(avg) 0.47 0.53 tCK Data Input Hold Time after DQS Strobe tDH 65 - ps DQ Input Pulse Width tDIPW 400 - ps DQS Output Access Time from Clock tDQSCK -255 +255 ps Write DQS High Level Width tDQSH 0.45 0.55 tCK(avg) Write DQS Low Level Width tDQSL 0.45 0.55 tCK(avg) DQS-Out Edge to Data-Out Edge Skew tDQSQ - 125 ps Data Input Setup Time Before DQS Strobe tDS 30 - ps DQS Falling Edge from Clock, Hold Time tDSH 0.2 - tCK(avg) DQS Falling Edge to Clock, Setup Time tDSS 0.2 - tCK(avg) Clock Half Period tHP minimum of tCH or tCL - ns Address and Command Hold Time after Clock tIH 140 - ps Address and Command Setup Time before Clock tIS 65 - ps Load Mode Command Cycle Time tMRD 4 - tCK DQ-to-DQS Hold tQH 0.38 - tCK(avg) Active-to-Precharge Time tRAS 36 9*tREFI ns Active-to-Active / Auto Refresh Time tRC 49.125 - ns RAS-to-CAS Delay tRCD 13.125 - ns Average Periodic Refresh Interval 0 o C < T CASE < 85 o C tREFI - 7.8 µs Average Periodic Refresh Interval 0 o C < T CASE < 95 o C tREFI - 3.9 µs Auto Refresh Row Cycle Time tRFC 160 - ns Row Precharge Time tRP 13.125 - ns Read DQS Preamble Time tRPRE 0.9 Note-1 tCK(avg) Read DQS Postamble Time tRPST 0.3 Note-2 tCK(avg) Row Active to Row Active Delay tRRD Max(4nCK, 6ns) - ns Internal Read to Precharge Command Delay tRTP Max(4nCK, 7.5ns) - ns Write DQS Preamble Setup Time tWPRE 0.9 - tCK(avg) Write DQS Postamble Time tWPST 0.3 - tCK(avg) Write Recovery Time tWR 15 - ns Internal Write to Read Command Delay tWTR Max(4nCK, 7.5ns) - ns Notes: 1. The maximum preamble is bound by tLZDQS(min) The maximum postamble is bound by tHZDQS(max) |
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