參數(shù)資料
型號: HYB18T1G800C4F-3
廠商: QIMONDA AG
元件分類: DRAM
英文描述: 128M X 8 DDR DRAM, 0.45 ns, PBGA60
封裝: GREEN, PLASTIC, TFBGA-60
文件頁數(shù): 36/58頁
文件大?。?/td> 1898K
代理商: HYB18T1G800C4F-3
HYB18T1G[40/80/16]0C4F
1-Gbit Double-Data-Rate-Two SDRAM
Internet Data Sheet
Rev. 1.01, 2008-11
41
04212008-66HT-ZLFE
7.2
Component AC Timing Parameters
TABLE 37
DRAM Component Timing Parameter by Speed Grade – DDR2–800 and DDR2–667
Parameter
Symbol
DDR2–800
DDR2–667
Unit
Min.
Max.
Min.
Max.
DQ output access time from CK / CK
t
AC
–400
+400
–450
+450
ps
CAS to CAS command delay
t
CCD
2—
nCK
Average clock high pulse width
t
CH.AVG
0.48
0.52
0.48
0.52
t
CK.AVG
Average clock period
t
CK.AVG
2500
8000
3000
8000
ps
CKE minimum pulse width ( high and
low pulse width)
t
CKE
3—
nCK
Average clock low pulse width
t
CL.AVG
0.48
0.52
0.48
0.52
t
CK.AVG
Auto-Precharge write recovery +
precharge time
t
DAL
WR +
t
nRP
—WR +
t
nRP
—nCK
Minimum time clocks remain ON after
CKE asynchronously drops LOW
t
DELAY
t
IS + tCK .AVG
+
t
IH
––
t
IS +
t
CK .AVG + tIH
––
ns
DQ and DM input hold time
t
DH.BASE
125
––
175
––
ps
DQ and DM input pulse width for each
input
t
DIPW
0.35
0.35
t
CK.AVG
DQS output access time from CK / CK
t
DQSCK
–350
+350
–400
+400
ps
DQS input high pulse width
t
DQSH
0.35
0.35
t
CK.AVG
DQS input low pulse width
t
DQSL
0.35
0.35
t
CK.AVG
DQS-DQ skew for DQS & associated
DQ signals
t
DQSQ
200
240
ps
DQS latching rising transition to
associated clock edges
t
DQSS
– 0.25
+ 0.25
– 0.25
+ 0.25
t
CK.AVG
DQ and DM input setup time
t
DS.BASE
50
––
100
––
ps
DQS falling edge hold time from CK
t
DSH
0.2
0.2
t
CK.AVG
DQS falling edge to CK setup time
t
DSS
0.2
0.2
t
CK.AVG
Four Activate Window for 1KB page
size products
t
FAW
35
37.5
ns
Four Activate Window for 2KB page
size products
t
FAW
45
50
ns
CK half pulse width
t
HP
Min(
t
CH.ABS,
t
CL.ABS)
__
Min(
t
CH.ABS,
t
CL.ABS)
__
ps
Data-out high-impedance time from
CK / CK
t
HZ
t
AC.MAX
t
AC.MAX
ps
Address and control input hold time
t
IH.BASE
250
275
ps
Control & address input pulse width
for each input
t
IPW
0.6
0.6
t
CK.AVG
Address and control input setup time
t
IS.BASE
175
200
ps
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