Internet Data Sheet
HY[B/I]18T1G[40/80/16]0C2[C/F](L)
1-Gbit Double-Data-Rate-Two SDRAM
7.2
Component AC Timing Parameters
TABLE 38
DRAM Component Timing Parameter by Speed Grade – DDR2–1066
Parameter
Symbol
DDR2–1066
Unit
Note1)2)3)4)5)
6)7)
Min.
Max.
8)
DQ output access time from CK / CK
CAS to CAS command delay
Average clock high pulse width
Average clock period
tAC
–350
2
+350
—
ps
tCCD
nCK
tCK.AVG
ps
9)10)
11)
tCH.AVG
tCK.AVG
0.48
1875
3
0.52
7500
—
CKE minimum pulse width ( high and low pulse tCKE
nCK
width)
9)10)
Average clock low pulse width
tCL.AVG
0.48
0.52
—
tCK.AVG
nCK
ns
12)13)
Auto-Precharge write recovery + precharge time tDAL
WR + tnRP
Minimum time clocks remain ON after CKE
asynchronously drops LOW
tDELAY
tIS + tCK .AVG + tIH ––
14)18)19)
8)
DQ and DM input hold time
tDH.BASE
tDIPW
tDQSCK
tDQSH
75
––
ps
DQ and DM input pulse width for each input
DQS output access time from CK / CK
DQS input high pulse width
0.35
–325
0.35
0.35
—
—
tCK.AVG
ps
+325
—
tCK.AVG
tCK.AVG
ps
DQS input low pulse width
tDQSL
—
15)
16)
DQS-DQ skew for DQS & associated DQ signals tDQSQ
175
+ 0.25
DQS latching rising transition to associated clock tDQSS
– 0.25
tCK.AVG
edges
17)18)19)
16)
DQ and DM input setup time
tDS.BASE
0
––
—
—
—
ps
DQS falling edge hold time from CK
DQS falling edge to CK setup time
tDSH
tDSS
tFAW
0.2
0.2
35
tCK.AVG
tCK.AVG
ns
16)
34)
Four Activate Window for 1KB page size
products
34)
20)
Four Activate Window for 2KB page size
products
tFAW
tHP
45
—
ns
ps
CK half pulse width
Min(tCH.ABS
,
__
tCL.ABS
)
8)21)
Data-out high-impedance time from CK / CK
Address and control input hold time
tHZ
—
tAC.MAX
—
ps
22)24)
tIH.BASE
tIPW
200
0.6
ps
Control & address input pulse width for each
input
—
tCK.AVG
23)24)
8)21)
8)21)
34)
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
tIS.BASE
tLZ.DQ
tLZ.DQS
tMOD
125
—
ps
ps
ps
ns
2 × tAC.MIN
tAC.MIN
0
tAC.MAX
tAC.MAX
12
Rev. 1.60, 2008-08
42
09262007-3YK7-BKKG
QIMONDA [ QIMONDA AG ]
