Internet Data Sheet
HYS[64/72]T256020EU-[25F/2.5/3/3S/3.7]-B
Unbuffered DDR2 SDRAM Module
Product Type
Organization
HYS64T256020EU–25F–B HYS72T256020EU–25F–B
2 GByte
×64
2 GByte
×72
2 Ranks (×8)
PC2–6400U–555
Rev. 1.2
HEX
2 Ranks (×8)
PC2–6400E–555
Rev. 1.2
HEX
Label Code
JEDEC SPD Revision
Byte#
Description
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
Supported CAS Latencies
DIMM Mechanical Characteristics
DIMM Type Information
DIMM Attributes
70
00
02
00
07
25
40
3D
50
32
1E
32
2D
01
17
25
05
12
3C
1E
1E
00
36
39
7F
80
14
1E
00
57
60
5F
40
70
00
02
00
07
25
40
3D
50
32
1E
32
2D
01
17
25
05
12
3C
1E
1E
00
36
39
7F
80
14
1E
00
57
60
5F
40
Component Attributes
t
t
t
t
t
t
t
t
CK @ CLMAX -1 (Byte 18) [ns]
AC SDRAM @ CLMAX -1 [ns]
CK @ CLMAX -2 (Byte 18) [ns]
AC SDRAM @ CLMAX -2 [ns]
RP.MIN [ns]
RRD.MIN [ns]
RCD.MIN [ns]
RAS.MIN [ns]
Module Density per Rank
t
t
t
t
t
t
t
AS.MIN and tCS.MIN [ns]
AH.MIN and tCH.MIN [ns]
DS.MIN [ns]
DH.MIN [ns]
WR.MIN [ns]
WTR.MIN [ns]
RTP.MIN [ns]
Analysis Characteristics
t
t
t
t
t
t
RC and tRFC Extension
RC.MIN [ns]
RFC.MIN [ns]
CK.MAX [ns]
DQSQ.MAX [ns]
QHS.MAX [ns]
PLL Relock Time
CASE.MAX Delta / ∆T4R4W Delta
T
Psi(T-A) DRAM
∆T0 (DT0)
∆T2N (DT2N, UDIMM) or ∆T2Q (DT2Q, RDIMM)
Rev. 1.0, 2006-10
36
10262006-SX8C-DEY8
QIMONDA [ QIMONDA AG ]
