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DTM67220
1GB 200-Pin 1Rx8 Unbuffered Non-ECC DDR2 SO-DIMM
Document 06833, Revision A, 28-Sep-11, Dataram Corporation
2011 Page 10
32 Address and Command Setup Time Before Clock (tIS) (ns) 0.17 0x17
33 Address and Command Hold Time After Clock (tIH) (ns) 0.25 0x25
34 Data Input Setup Time Before Strobe (tDS) (ns) 0.05 0x05
35 Data Input Hold Time After Strobe (tDH) (ns) 0.12 0x12
36 Write Recovery Time (tWR ) (ns) 15 0x3C
37 Internal write to read command delay (tWTR ) (ns) 7.5 0x1E
38 Internal read to precharge command delay (tRTP ) (ns) 7.5 0x1E
39 Memory Analysis Probe Characteristics. UNUSED 0x00
Extension of Byte 41(tRC) and Byte 42 (tRFC) (ns)
0x06
Add this value to byte 41 -
0
40
Add this value to byte 42 -
0.5
41
SDRAM Device Minimum Active to Active/Auto Refresh Time (tRC)
(ns) 60 0x3C
42
SDRAM Device Minimum Auto-Refresh to Active/Auto-Refresh
Command Period (tRFC). (ns) 127.5 0x7F
43 SDRAM Device Maximum Cycle Time (tCK max). (ns) 8 0x80
44 SDRAM Dev DQS-DQ Skew for DQS & DQ signals (tDQSQ) (ns) 0.2 0x14
45 DDR SDRAM Device Read Data Hold Skew Factor (tQHS) (ns) 0.3 0x1E
46 PLL Relock Time (us) UNUSED 0x00
DRAM maximum Case Temperature Delta. (Degree C). 0x00
DT4R4W Delta (Bits 0:3) -
0
47
Tcasemax delta (Bits 7:4) -
0
48
Thermal Resistance of DRAM Package from Top (Case) to Ambient (
Psi T-A DRAM ). (C/Watt)
58 0x74
DRAM Case Temperature Rise from Ambient due to Activate-
Precharge/
Mode Bits (DT0/Mode Bits). (Degree C).
0x58
Bit 0. If "0" DRAM does not support high temperature self-refresh entry
-
0
Bit 1. If "0" Do not need double refresh rate for the proper operation -
0
49
DT0, (Bits 2:7) -
6.6
50
DRAM Case Temperature Rise from Ambient due to Precharge/Quiet
Standby (DT2N/DT2Q). (Degree C).
4.4 0x2C
51
DRAM Case Temperature Rise from Ambient due to Precharge
Power-Down (DT2P). (Degree C).
0.765 0x33
52
DRAM Case Temperature Rise from Ambient due to Active Standby
(DT3N). (Degree C).
6 0x28
53
DRAM Case temperature Rise from Ambient due to Active Power-
Down with Fast PDN Exit (DT3Pfast). (Degree C).
3.3 0x42