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HYB18TC1G800AF Datasheet, PDF (37/54 Pages) Qimonda AG – 1-Gbit DDR2 SDRAM | |||
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Internet Data Sheet
HYB18TC1G[80/16]0AF
1-Gbit DDR2 SDRAM
7.2
AC Timing Parameters
List of Timing Parameters Tables.
⢠Table 40 âTiming Parameter by Speed Grade - DDR2â667â on Page 37
⢠Table 41 âTiming Parameter by Speed Grade - DDR2â533â on Page 42
⢠Table 42 âTiming Parameter by Speed Grade - DDR2-400â on Page 44
Parameter
Symbol
DQ output access time from CK / CK
tAC
DQS output access time from CK / CK
tDQSCK
Average clock high pulse width
tCH.AVG
Average clock low pulse width
tCL.AVG
Average clock period
tCK.AVG
DQ and DM input setup time
tDS.BASE
DQ and DM input hold time
tDH.BASE
Control & address input pulse width for each input tIPW
DQ and DM input pulse width for each input
tDIPW
Data-out high-impedance time from CK / CK
tHZ
DQS/DQS low-impedance time from CK / CK
tLZ.DQS
DQ low impedance time from CK/CK
tLZ.DQ
DQS-DQ skew for DQS & associated DQ signals tDQSQ
CK half pulse width
tHP
DQ hold skew factor
tQHS
DQ/DQS output hold time from DQS
tQH
Write command to DQS associated clock edges WL
DQS latching rising transition to associated clock tDQSS
edges
DQS input high pulse width
DQS input low pulse width
DQS falling edge to CK setup time
DQS falling edge hold time from CK
Write postamble
Write preamble
Address and control input setup time
Address and control input hold time
Read preamble
Read postamble
Active to precharge command
tDQSH
tDQSL
tDSS
tDSH
tWPST
tWPRE
tLS.BASE
tLH.BASE
tRPRE
tRPST
tRAS
TABLE 40
Timing Parameter by Speed Grade - DDR2â667
DDR2â667
Min.
Max.
Unit
Note
1)2)3)4)5)6)7)
â450
â400
0.48
0.48
3000
100
175
0.6
0.35
â
tAC.MIN
2 Ã tAC.MIN
â
Min(tCH.ABS,
tCL.ABS)
â
tHP â tQHS
RLâ1
â 0.25
+450
+400
0.52
0.52
8000
â
â
â
â
tAC.MAX
tAC.MAX
tAC.MAX
240
â
340
â
+ 0.25
ps
ps
tCK.AVG
tCK.AVG
ps
ps
ps
tCK.AVG
tCK.AVG
ps
ps
ps
ps
ps
8)
8)
9)10)
9)10)
11)12)13)
12)13)14)
8)15)
8)15)
8)15)
16)
17)
ps
18)
ps
19)
nCK
t 20)
CK.AVG
0.35
0.35
0.2
0.2
0.4
0.35
200
275
0.9
0.4
45
â
â
â
â
0.6
â
â
â
1.1
0.6
70000
tCK.AVG
tCK.AVG
tCK.AVG
tCK.AVG
tCK.AVG
tCK.AVG
ps
ps
tCK.AVG
tCK.AVG
ns
20)
20)
21)22)
22)23)
24)25)
24)26)
27)
Rev. 1.11, 2006-09
37
03292006-PJAE-UQLG
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