参数资料
型号: MT41J128M16HA-107:D
元件分类: DRAM
英文描述: 128M X 16 DDR DRAM, PBGA96
封装: 9 X 14 MM, LEAD FREE, FBGA-96
文件页数: 195/210页
文件大小: 12448K
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20. The setup and hold times are listed converting the base specification values (to which
derating tables apply) to VREF when the slew rate is 1 V/ns. These values, with a slew rate
of 1 V/ns, are for reference only.
21. When the device is operated with input clock jitter, this parameter needs to be derated
by the actual tJITper (larger of tJITper (MIN) or tJITper (MAX) of the input clock (output
deratings are relative to the SDRAM input clock).
22. Single-ended signal parameter.
23. The DRAM output timing is aligned to the nominal or average clock. Most output param-
eters must be derated by the actual jitter error when input clock jitter is present, even
when within specification. This results in each parameter becoming larger. The follow-
ing parameters are required to be derated by subtracting tERR10PER (MAX): tDQSCK
(MIN), tLZ (DQS) MIN, tLZ (DQ) MIN, and tAON (MIN). The following parameters are re-
quired to be derated by subtracting tERR10PER (MIN): tDQSCK (MAX), tHZ (MAX), tLZ
(DQS) MAX, tLZ(DQ) MAX, and tAON (MAX). The parameter tRPRE (MIN) is derated by
subtracting tJITper (MAX), while tRPRE (MAX) is derated by subtracting tJITper (MIN).
24. The maximum preamble is bound by tLZDQS (MAX).
25. These parameters are measured from a data strobe signal (DQS, DQS#) crossing to its
respective clock signal (CK, CK#) crossing. The specification values are not affected by
the amount of clock jitter applied, as these are relative to the clock signal crossing.
These parameters should be met whether clock jitter is present.
26. The tDQSCKdll_dis parameter begins CL + AL - 1 cycles after the READ command.
27. The maximum postamble is bound by tHZDQS (MAX).
28. Commands requiring a locked DLL are: READ (and RDAP) and synchronous ODT com-
mands. In addition, after any change of latency tXPDLL, timing must be met.
29. tIS (base) and tIH (base) values are for a single-ended 1 V/ns control/command/address
slew rate and 2 V/ns CK, CK# differential slew rate.
30. These parameters are measured from a command/address signal transition edge to its
respective clock (CK, CK#) signal crossing. The specification values are not affected by
the amount of clock jitter applied as the setup and hold times are relative to the clock
signal crossing that latches the command/address. These parameters should be met
whether clock jitter is present.
31. For these parameters, the DDR3 SDRAM device supports tnPARAM (nCK) = RU(tPARAM
[ns]/tCK[AVG] [ns]), assuming all input clock jitter specifications are satisfied. For exam-
ple, the device will support tnRP (nCK) = RU(tRP/tCK[AVG]) if all input clock jitter specifi-
cations are met. This means that for DDR3-800 6-6-6, of which tRP = 5ns, the device will
support tnRP = RU(tRP/tCK[AVG]) = 6 as long as the input clock jitter specifications are
met. That is, the PRECHARGE command at T0 and the ACTIVATE command at T0 + 6 are
valid even if six clocks are less than 15ns due to input clock jitter.
32. During READs and WRITEs with auto precharge, the DDR3 SDRAM will hold off the inter-
nal PRECHARGE command until tRAS (MIN) has been satisfied.
33. When operating in DLL disable mode, the greater of 4CK or 15ns is satisfied for tWR.
34. The start of the write recovery time is defined as follows:
For BL8 (fixed by MRS and OTF): Rising clock edge four clock cycles after WL
For BC4 (OTF): Rising clock edge four clock cycles after WL
For BC4 (fixed by MRS): Rising clock edge two clock cycles after WL
35. RESET# should be LOW as soon as power starts to ramp to ensure the outputs are in High-
Z. Until RESET# is LOW, the outputs are at risk of driving and could result in excessive
current, depending on bus activity.
36. The refresh period is 64ms when TC is less than or equal to 85°C. This equates to an aver-
age refresh rate of 7.8125s. However, nine REFRESH commands should be asserted at
least once every 70.3s. When TC is greater than +85°C, the refresh period is 32ms. Al-
though JEDEC specifies tREFI as a MAX, Micron allows REFRESH commands to be burst
provided that the maximum refresh period is not violated.
2Gb: x4, x8, x16 DDR3 SDRAM
PDF: 09005aef826aaadc
2Gb_DDR3_SDRAM.pdf – Rev. K 04/10 EN
85
Micron Technology, Inc. reserves the right to change products or specifications without notice.
2006 Micron Technology, Inc. All rights reserved.
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