DDR2-400, 533
Single Rank, x8 Registered SDRAM DIMMs
Electrical Characteristics and AC Timings:
VDD = +1.8V ± 0.1V, VDDQ = +1.8V ± 0.1V, VREF = VSS, f =100MHz, 0°C<TOPR <+55°C, VOUT(DC) = VDDQ/2
Symbol
-5
-3.75
Units
Parameter
DDR2-400
DDR2-533
MIN
MAX
MIN
MAX
tAC
-600
-500
+600
-500
-450
+500 ps
+450 ps
DQ output access time from CK/
CK
tDQSCK
+500
DQS output access time from CK/
CK
CK high-level width
CK low-level width
CK half period
tCH
tCL
tHP
0.45
0.45
0.55
0.55
-
0.45
0.45
0.55
0.55
-
tCK
tCK
ps
MIN
(tCH,
tCL)
MIN
(tCH,
tCL)
Clock cycle time
tCK CL=3
5,000
CL=4 & 5 5,000
8,000
8,000
5,000
3,750
8,000 ps
8,000 ps
DQ and DM input hold time
DQ and DM input setup time
tDH
tDS
400
400
0.6
-
-
-
350
350
0.6
-
-
-
ps
ps
Control & Address input pulse width for tIPW
tCK
each input
DQ and DM input pulse width for each tDIPW
input
0.35
-
0.35
-
tCK
ps
-
tACmax
-
tACmax
Data-out high-impedance time from
tHZ
CK/
CK
Data-out low-impedance time from
CK/
tACmin
tACmax
tACmin
tACmax
tLZ
ps
ps
CK
DQS-DQ skew for DQS and associated DQ tDQSQ
signals
-
350
-
300
Data hold skew factor
tQHS
tQH
-
450
-
-
400
-
ps
ps
Data output hold time from DQS
tHP-
tHP-
tQHS
WL-0.25
tQHS
WL-0.25
Write command to 1st DQS latching
transition
DQS input low/high pulse width
DQS falling edge to CK setup time
DQS falling edge hold time from CK
tDQSS
WL+
0.25
-
-
-
-
WL+ tCK
0.25
tDQSL/H
tDSS
0.35
0.2
0.2
2
0.35
0.2
0.2
2
-
-
-
-
tCK
tCK
tCK
tCK
tDSH
Mode register set command cycle time tMRD
Write preamble setup time
Write preamble
tWPRES
0
-
0
-
-
ps
tWPRE
tWPST
tRPRE
tRPST
tRAS
tRC
0.25
0.40
0.9
0.4
45
-
0.25
0.40
0.9
0.4
45
tCK
tCK
tCK
tCK
Write postamble
0.60
0.60
1.1
0.6
Read preamble
Read postamble
Active to Precharge command
Active to Active command period
Refresh to Refresh command interval
Active to Read/Write delay
Precharge command period
1.1
0.6
70,000
70,000 ns
60
-
-
-
-
60
-
-
-
-
ns
ns
ns
ns
tRFC
tRCD
tRP
105
15
105
15
15
15
DDR2_RDIMM_1 rank_x8_spec
Rev. 1.0 - December, 04
Wintec Industries, Inc., reserves the right to change datasheets and/or products without any notice.
2004 Wintec Industries, Inc.
7
XILINX [ XILINX, INC ]
