HYS72T256000ER Datasheet, PDF (19/33 Pages) Qimonda AG – 240-Pin Registered DDR2 SDRAM Modules

Internet Data Sheet
HYS72T256000ER-[3.7/5]-B
Registerd DDR2 SDRAM Module
Parameter
TABLE 15
DRAM Component Timing Parameter by Speed Grade - DDR2-400
Symbol
DDR2–400
Min.
Max.
Unit
Note^1)2)3)4)5)
6)7)
DQ output access time from CK / CK
t_AC
CAS A to CAS B command period
t_CCD
CK, CK high-level width
t_CH
CKE minimum high and low pulse width
t_CKE
CK, CK low-level width
t_CL
Auto-Precharge write recovery + precharge t_DAL
time
Minimum time clocks remain ON after CKE
asynchronously drops LOW
t_DELAY
DQ and DM input hold time (differential data t_DH(base)
strobe)
DQ and DM input hold time (single ended data t_DH1(base)
strobe)
DQ and DM input pulse width (each input)
DQS output access time from CK / CK
DQS input low (high) pulse width (write cycle)
DQS-DQ skew (for DQS & associated DQ
signals)
t_DIPW
t_DQSCK
t_DQSL,H
t_DQSQ
Write command to 1st DQS latching transition t_DQSS
DQ and DM input setup time (differential data t_DS(base)
strobe)
DQ and DM input setup time (single ended
data strobe)
t_DS1(base)
DQS falling edge hold time from CK (write
t_DSH
cycle)
DQS falling edge to CK setup time (write cycle) t_DSS
Four Activate Window period
t_FAW
Clock half period
Data-out high-impedance time from CK / CK
Address and control input hold time
Address and control input pulse width
(each input)
Address and control input setup time
DQ low-impedance time from CK / CK
DQS low-impedance from CK / CK
Mode register set command cycle time
OCD drive mode output delay
Data output hold time from DQS
t_HP
t_HZ
t_IH(base)
t_IPW
t_IS(base)
t_LZ(DQ)
t_LZ(DQS)
t_MRD
t_OIT
t_QH
–600
2
0.45
3
0.45
WR + t_RP
t_IS + t_CK + t_IH
275
–25
0.35
–500
0.35
—
– 0.25
150
–25
0.2
0.2
37.5
50
MIN. (t_CL, t_CH)
—
475
0.6
350
2 × t_AC.MIN
t_AC.MIN
2
0
t_HP –t_QHS
+600
—
0.55
—
0.55
—
––
––
—
—
+500
—
350
+ 0.25
—
—
—
—
—
—
t_AC.MAX
—
—
—
t_AC.MAX
t_AC.MAX
—
12
—
ps
t_CK
t_CK
t_CK
t_CK
t_CK
8)22)
ns
9)
ps
10)
ps
11)
t_CK
ps
t_CK
ps
11)
t_CK
ps
11)
ps
11)
t_CK
t_CK
ns
ns
13)
12)
ps
13)
ps
11)
t_CK
ps
11)
ps
14)
ps
14)
t_CK
ns
—
Rev. 1.0, 2006-10
19
10202006-EHWJ-OT02