Internet Data Sheet
HYS72T[128/256]00xHR–[3S/3.7/5]–A
Registered DDR2 SDRAM Modules
Parameter
Symbol
DDR2–667
Unit
Note1)2)3)4)5)6)7)
8)
Min.
Max.
12)
CKE minimum pulse width ( high and low pulse tCKE
3
—
nCK
width)
1)1)
Average clock low pulse width
tCL.AVG
0.48
0.52
—
tCK.AVG
nCK
ns
13)14)
Auto-Precharge write recovery + precharge time tDAL
WR + tnRP
Minimum time clocks remain ON after CKE
asynchronously drops LOW
tDELAY
tIS + tCK .AVG
tIH
+
—
19)20)15)
9)
DQ and DM input hold time
tDH.BASE
tDIPW
tDQSCK
tDQSH
175
—
ps
DQ and DM input pulse width for each input
DQS output access time from CK / CK
DQS input high pulse width
0.35
–400
0.35
0.35
—
—
tCK.AVG
ps
+400
—
tCK.AVG
tCK.AVG
ps
DQS input low pulse width
tDQSL
—
16)
17)
DQS-DQ skew for DQS & associated DQ signals tDQSQ
240
+0.25
DQS latching rising transition to associated clock tDQSS
–0.25
tCK.AVG
edges
18)19)20)
17)
DQ and DM input setup time
DQS falling edge hold time from CK
DQS falling edge to CK setup time
CK half pulse width
tDS.BASE
100
0.2
0.2
––
—
—
__
ps
tDSH
tDSS
tHP
tCK.AVG
tCK.AVG
ps
17)
21)
Min(tCH.ABS
,
tCL.ABS
)
9)22)
Data-out high-impedance time from CK / CK
Address and control input hold time
tHZ
—
tAC.MAX
—
ps
25)23)
tIH.BASE
275
0.6
ps
Control & address input pulse width for each input tIPW
—
tCK.AVG
ps
24)25)
9)22)
9)22)
1)
Address and control input setup time
DQ low impedance time from CK/CK
DQS/DQS low-impedance time from CK / CK
MRS command to ODT update delay
Mode register set command cycle time
OCD drive mode output delay
DQ/DQS output hold time from DQS
DQ hold skew factor
tIS.BASE
200
—
tLZ.DQ
tLZ.DQS
tMOD
tMRD
tOIT
2 × tAC.MIN
tAC.MAX
tAC.MAX
12
ps
tAC.MIN
ps
0
2
0
ns
—
nCK
ns
1)
12
26)
tQH
t
HP – tQHS
—
ps
27)
tQHS
—
340
1.1
0.6
—
ps
28)29)
28)30)
31)
Read preamble
tRPRE
tRPST
tRTP
0.9
0.4
7.5
0.35
0.4
15
tCK.AVG
tCK.AVG
ns
Read postamble
Internal Read to Precharge command delay
Write preamble
tWPRE
tWPST
tWR
—
tCK.AVG
tCK.AVG
ns
Write postamble
0.6
—
31)
Write recovery time
31)32)
Internal write to read command delay
Exit power down to read command
tWTR
tXARD
7.5
2
—
ns
—
nCK
nCK
Exit active power-down mode to read command tXARDS
7 – AL
—
(slow exit, lower power)
Rev. 1.4, 2007-02
17
03062006-GD6J-14FP
QIMONDA [ QIMONDA AG ]
