Internet Data Sheet
Rev. 1.2, 2007-01
03292006-AYVF-ZIIJ
17
HYS72T[512/256]02xHR–[3S/3.7/5]–A
Registered DDR2 SDRAM Modules
3.3.2
Component AC Timing Parameters
This chapter contains the AC Timing Parameters.
TABLE 13
DRAM Component Timing Parameter by Speed Grade - DDR2–667
Parameter
Symbol
DDR2–667
Unit
Note
1)2)3)4)5)6)7)8)
Min.
Max.
DQ output access time from CK / CK
CAS to CAS command delay
Average clock high pulse width
Average clock period
CKE minimum pulse width ( high and low pulse
width)
Average clock low pulse width
Auto-Precharge write recovery + precharge time
Minimum time clocks remain ON after CKE
asynchronously drops LOW
DQ and DM input hold time
DQ and DM input pulse width for each input
DQS output access time from CK / CK
DQS input high pulse width
DQS input low pulse width
DQS-DQ skew for DQS & associated DQ signals
t
DQSQ
DQS latching rising transition to associated clock
edges
DQ and DM input setup time
DQS falling edge hold time from CK
DQS falling edge to CK setup time
Four Activate Window for 1KB page size products
t
FAW
Four Activate Window for 2KB page size products
t
FAW
CK half pulse width
t
AC
t
CCD
t
CH.AVG
t
CK.AVG
t
CKE
–450
2
0.48
3000
3
+450
—
0.52
8000
—
ps
nCK
t
CK.AVG
ps
nCK
9)
10)11)
12)
t
CL.AVG
t
DAL
t
DELAY
0.48
WR +
t
nRP
t
IS
+
t
CK .AVG
+
t
IH
175
0.35
–400
0.35
0.35
—
– 0.25
0.52
—
—
t
CK.AVG
nCK
ns
10)11)
13)14)
t
DH.BASE
t
DIPW
t
DQSCK
t
DQSH
t
DQSL
—
—
+400
—
—
240
+ 0.25
ps
t
CK.AVG
ps
t
CK.AVG
t
CK.AVG
ps
t
CK.AVG
19)20)15)
9)
16)
t
DQSS
17)
t
DS.BASE
t
DSH
t
DSS
100
0.2
0.2
37.5
50
Min(
t
CH.ABS
,
t
CL.ABS
)
—
275
0.6
200
2 x
t
AC.MIN
t
AC.MIN
0
2
0
t
HP
–
t
QHS
—
—
—
—
—
—
ps
t
CK.AVG
t
CK.AVG
ns
ns
ps
18)19)20)
17)
17)
31)
31)
t
HP
21)
Data-out high-impedance time from CK / CK
Address and control input hold time
Control & address input pulse width for each input
t
IPW
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
t
HZ
t
IH.BASE
t
AC.MAX
—
—
—
t
AC.MAX
t
AC.MAX
12
—
12
—
ps
ps
t
CK.AVG
ps
ps
ps
ns
nCK
ns
ps
9)22)
25)23)
t
IS.BASE
t
LZ.DQ
t
LZ.DQS
t
MOD
t
MRD
t
OIT
t
QH
24)25)
9)22)
9)22)
31)
31)
26)