EBE11UD8AGFA
AC Characteristics (TC = 0°C to +85°C, VDD, VDDQ = 1.8V ± 0.1V, VSS = 0V)
(DDR2 SDRAM Component Specification)
-6E
667
-5C
533
min.
4
-4A
400
min.
3
Frequency (Mbps)
Parameter
Symbol min.
max.
5
max.
5
max.
5
Unit
tCK
Notes
/CAS latency
CL
5
Active to read or write
command delay
tRCD
15
15
60
15
15
60
15
15
55
ns
ns
ns
Precharge command period tRP
Active to active/auto refresh
tRC
command time
DQ output access time from
CK, /CK
tAC
−450
+450
+400
−500
−450
+500
+450
−600
−500
+600
+500
ps
ps
DQS output access time from
CK, /CK
tDQSCK −400
CK high-level width
tCH
tCL
0.45
0.45
0.55
0.55
0.45
0.45
0.55
0.55
0.45
0.45
0.55
0.55
tCK
tCK
CK low-level width
CK half period
min.
(tCL, tCH)
min.
(tCL, tCH)
min.
(tCL, tCH)
tHP
ps
Clock cycle time
tCK
tDH
3000
175
8000
3750
225
8000
5000
275
8000
ps
ps
ps
DQ and DM input hold time
5
4
DQ and DM input setup time tDS
100
100
150
Control and Address input
tIPW
0.6
0.6
0.6
tCK
tCK
ps
pulse width for each input
DQ and DM input pulse width
tDIPW
0.35
0.35
0.35
for each input
Data-out high-impedance
tHZ
tAC max.
tAC max.
tAC max.
tAC max.
tAC max.
tAC max.
time from CK,/CK
Data-out low-impedance time
from CK,/CK
tLZ
tAC min.
tAC min.
tAC min.
ps
DQS-DQ skew for DQS and
tDQSQ
240
340
300
400
350
450
ps
ps
ps
associated DQ signals
DQ hold skew factor
tQHS
tQH
DQ/DQS output hold time
from DQS
tHP – tQHS
tHP – tQHS
tHP – tQHS
Write command to first DQS
latching transition
tDQSS WL − 0.25 WL + 0.25 WL − 0.25 WL + 0.25 WL − 0.25 WL + 0.25 tCK
DQS input high pulse width
DQS input low pulse width
tDQSH 0.35
0.35
0.35
0.35
0.35
tCK
tCK
tDQSL
tDSS
0.35
0.2
DQS falling edge to CK setup
time
0.2
0.2
2
0.2
0.2
2
tCK
tCK
tCK
DQS falling edge hold time
from CK
tDSH
tMRD
0.2
2
Mode register set command
cycle time
Write postamble
Write preamble
tWPST 0.4
tWPRE 0.35
0.6
0.4
0.6
0.4
0.6
tCK
tCK
0.35
0.35
Address and control input
hold time
tIH
tIS
275
200
375
250
475
350
ps
ps
5
4
Address and control input
setup time
Read preamble
Read postamble
tRPRE 0.9
tRPST 0.4
1.1
0.6
0.9
0.4
1.1
0.6
0.9
0.4
1.1
0.6
tCK
tCK
Data Sheet E0782E20 (Ver. 2.0)
16
ELPIDA [ ELPIDA MEMORY ]
