Internet Data Sheet
HY[B/I]18T1G[40/80/16]0C2[C/F]
1-Gbit Double-Data-Rate-Two SDRAM
Parameter
Symbol DDR2–800
Min.
DDR2–667
Unit
Note1)2)3
)4)5)6)7)
Max.
Min.
Max.
Minimum time clocks remain ON after tDELAY
tIS + tCK .AVG ––
tIS +
––
ns
CKE asynchronously drops LOW
+ tIH
125
0.35
tCK .AVG + tIH
14)18)19)
DQ and DM input hold time
tDH.BASE
––
—
175
––
—
ps
DQ and DM input pulse width for each tDIPW
0.35
tCK.AVG
input
8)
DQS output access time from CK / CK tDQSCK
–350
0.35
0.35
—
+350
—
–400
0.35
0.35
—
+400
—
ps
DQS input high pulse width
DQS input low pulse width
tDQSH
tDQSL
tCK.AVG
tCK.AVG
ps
—
—
15)
16)
DQS-DQ skew for DQS & associated tDQSQ
DQ signals
200
240
DQS latching rising transition to
associated clock edges
tDQSS
– 0.25
+ 0.25
– 0.25
+ 0.25
tCK.AVG
17)18)19)
16)
DQ and DM input setup time
tDS.BASE
50
––
—
—
—
100
0.2
––
—
—
—
ps
DQS falling edge hold time from CK tDSH
DQS falling edge to CK setup time tDSS
0.2
0.2
35
tCK.AVG
tCK.AVG
ns
16)
0.2
34)
Four Activate Window for 1KB page tFAW
37.5
size products
34)
Four Activate Window for 2KB page tFAW
size products
45
—
50
—
ns
ps
ps
20)
CK half pulse width
tHP
Min(tCH.ABS
tCL.ABS
,
__
Min(tCH.ABS
tCL.ABS)
,
__
)
8)21)
22)24)
Data-out high-impedance time from tHZ
CK / CK
—
tAC.MAX
—
tAC.MAX
Address and control input hold time tIH.BASE
250
0.6
—
—
275
0.6
—
—
ps
Control & address input pulse width tIPW
tCK.AVG
for each input
23)24)
8)21)
8)21)
Address and control input setup time tIS.BASE
DQ low impedance time from CK/CK tLZ.DQ
175
—
200
—
ps
ps
ps
2 x tAC.MIN
tAC.MAX
tAC.MAX
2 x tAC.MIN
tAC.MAX
tAC.MAX
DQS/DQS low-impedance time from tLZ.DQS
tAC.MIN
tAC.MIN
CK / CK
34)
MRS command to ODT update delay tMOD
0
2
12
—
0
2
12
—
ns
Mode register set command cycle
time
tMRD
nCK
34)
OCD drive mode output delay
tOIT
0
12
0
12
ns
ps
ps
μs
μs
ns
25)
DQ/DQS output hold time from DQS tQH
tHP – tQHS
—
t
HP – tQHS
—
26)
DQ hold skew factor
tQHS
tREFI
—
300
7.8
3.9
—
—
340
7.8
3.9
—
27)28)
27)29)
30)
Average periodic refresh Interval
—
—
—
—
Auto-Refresh to Active/Auto-Refresh tRFC
127.5
127.5
command period
31)32)
31)33)
Read preamble
Read postamble
tRPRE
tRPST
0.9
0.4
1.1
0.6
0.9
0.4
1.1
0.6
tCK.AVG
tCK.AVG
Rev. 1.02, 2008-01
45
09262007-3YK7-BKKG
QIMONDA [ QIMONDA AG ]
