Internet Data Sheet
HY[B/I]18T512[40/80/16]0B2[C/F](L)
512-Mbit Double-Data-Rate-Two SDRAM
Parameter
Symbol
DDR2–533
DDR2–400
Unit
Notes1)2)
3)4)5)6)
Min.
Max.
Min.
Max.
13)
13)
DQ low-impedance time from CK / tLZ.DQ
CK
2 × tAC.MIN
tAC.MAX
2 × tAC.MIN
tAC.MAX
ps
ps
ns
tCK
DQS/DQS low-impedance time from tLZ.DQS
CK / CK
tAC.MIN
tAC.MAX
12
tAC.MIN
tAC.MAX
12
MRS command to ODT update
delay
tMOD
tMRD
0
2
0
0
2
0
Mode register set command cycle
time
—
—
OCD drive mode output delay
Data output hold time from DQS
Data hold skew factor
tOIT
12
12
ns
ps
ps
μs
μs
ns
tQH
t
HP –tQHS
—
t
HP –tQHS
—
tQHS
tREFI
tREFI
tRFC
—
400
7.8
3.9
—
—
—
450
7.8
3.9
—
13)14)
15)17)
16)
Average periodic refresh Interval
Average periodic refresh Interval
—
—
—
Auto-Refresh to Active/Auto-
Refresh command period
105
105
13)
Read preamble
Read postamble
tRPRE
tRPST
tRRD
0.9
1.1
0.60
—
0.9
1.1
0.60
—
tCK
tCK
ns
13)
0.40
7.5
0.40
7.5
13)17)
Active bank A to Active bank B
command period for 1 KB page size
15)21)
Active bank A to Active bank B
command period for 2 KB page size
tRRD
10
—
—
10
—
—
ns
ns
Internal Read to Precharge
command delay
tRTP
7.5
7.5
Write preamble
tWPRE
tWPST
tWR
0.35
0.40
15
—
0.35
0.40
15
—
tCK
tCK
ns
ns
18)
Write postamble
Write recovery time
0.60
—
0.60
—
19)
20)
20)
Internal Write to Read command
delay
tWTR
7.5
—
10
—
Exit active power down to read
command
tXARD
2
—
—
—
—
—
2
—
—
—
—
—
tCK
tCK
tCK
ns
Exit active power down to read
command (slow exit, lower power)
tXARDS
6 – AL
2
6 – AL
2
Exit precharge power down to any tXP
non-read command
Exit Self-Refresh to non-read
command
tXSNR
t
RFC +10
tRFC +10
Exit Self-Refresh to Read command tXSRD
200
WR/tCK
200
WR/tCK
tCK
tCK
21)
Write recovery time for write with
Auto-Precharge
WR
t
t
1) VDDQ = 1.8 V ± 0.1V; VDD = 1.8 V ± 0.1 V.
2) Timing that is not specified is illegal and after such an event, in order to guarantee proper operation, the DRAM must be powered down
and then restarted through the specified initialization sequence before normal operation can continue.
Rev. 1.40, 2008-03
48
10062006-YPTZ-CDR7
QIMONDA [ QIMONDA AG ]
