EBE10AD4AGFA
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
tRP
tRC
15
15
60
15
15
60
15
15
55
ns
ns
ns
Precharge command period
Active to active/auto refresh
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
CK low-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
min.
(tCL, tCH)
min.
(tCL, tCH)
min.
(tCL, tCH)
CK half period
tHP
ps
Clock cycle time
tCK
tDH
tDS
3000
175
8000
3750
225
8000
5000
275
8000
ps
ps
ps
DQ and DM input hold time
DQ and DM input setup time
5
4
100
100
150
Control and Address input pulse
width for each input
tIPW
0.6
0.6
0.6
tCK
tCK
DQ and DM input pulse width
for each input
tDIPW 0.35
tHZ
0.35
0.35
Data-out high-impedance time
from CK,/CK
tAC max.
tAC max.
tAC max. ps
tAC max. ps
Data-out low-impedance time
from CK,/CK
tLZ
tAC min.
tAC max. tAC min.
tAC max. tAC min.
DQS-DQ skew for DQS and
associated DQ signals
tDQSQ
tQHS
tQH
240
340
300
400
350
450
ps
ps
ps
DQ hold skew factor
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
tDQSL 0.35
0.35
0.35
0.35
0.35
tCK
tCK
DQS falling edge to CK setup
time
tDSS
tDSH
tMRD
0.2
0.2
2
0.2
0.2
2
0.2
0.2
2
tCK
tCK
tCK
DQS falling edge hold time from
CK
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
Preliminary Data Sheet E0865E11 (Ver. 1.1)
16
ELPIDA [ ELPIDA MEMORY ]
