參數(shù)資料
型號: EDE1116ABSE
廠商: Elpida Memory, Inc.
英文描述: 1G bits DDR2 SDRAM
中文描述: 1克位DDR2 SDRAM內(nèi)存
文件頁數(shù): 14/82頁
文件大小: 618K
代理商: EDE1116ABSE
EDE1104ABSE, EDE1108ABSE, EDE1116ABSE
Data Sheet E0852E50 (Ver. 5.0)
14
AC Characteristics (TC = 0
°
C to +85
°
C, VDD, VDDQ = 1.8V
±
0.1V, VSS, VSSQ = 0V) [DDR2-800, 667]
New units tCK(avg) and nCK, are introduced in DDR2-800 and DDR2-667
tCK(avg): actual tCK(avg) of the input clock under operation.
nCK: one clock cycle of the input clock, counting the actual clock edges.
-8E
-6C, -6E
Frequency (Mbps)
800
667
Parameter
Symbol
min.
max.
min.
max.
Unit
Notes
/CAS latency
CL
5
5
4 (-6C)
5 (-6E)
12 (-6C)
15 (-6E)
12 (-6C)
15 (-6E)
57 (-6C)
60 (-6E)
450
5
nCK
Active to read or write command delay
tRCD
12.5
ns
Precharge command period
tRP
12.5
ns
Active to active/auto-refresh command time tRC
57.5
ns
DQ output access time from CK, /CK
tAC
400
+
400
+450
ps
10
DQS output access time from CK, /CK
tDQSCK
350
+
350
400
+400
ps
10
CK high-level width
tCH (avg) 0.48
0.52
0.48
0.52
tCK (avg) 13
CK low-level width
tCL(avg)
0.48
Min. (tCL(abs),
tCH(abs))
0.52
0.48
Min.(tCL(abs),
tCH(abs))
3000
0.52
tCK (avg) 13
CK half period
tHP
ps
6, 13
Clock cycle time
tCK (avg) 2500
8000
8000
ps
13
DQ and DM input hold time
tDH (base) 125
175
ps
5
DQ and DM input setup time
Control and Address input pulse width for
each input
DQ and DM input pulse width for each input tDIPW
tDS (base) 50
100
ps
4
tIPW
0.6
0.6
tCK (avg)
0.35
0.35
tCK (avg)
Data-out high-impedance time from CK,/CK tHZ
DQS, /DQS low-impedance time from
CK,/CK
DQ low-impedance time from CK,/CK
DQS-DQ skew for DQS and associated DQ
signals
DQ hold skew factor
tAC max.
tAC max. ps
10
tLZ (DQS) tAC min.
tAC max. tAC min.
tAC max. ps
10
tLZ (DQ)
2
×
tAC min.
tAC max. 2
×
tAC min.
tAC max. ps
10
tDQSQ
200
240
ps
tQHS
300
340
ps
7
DQ/DQS output hold time from DQS
DQS latching rising transitions to associated
clock edges
DQS input high pulse width
tQH
tHP – tQHS
tHP – tQHS
ps
8
tDQSS
0.25
+
0.25
0.25
+
0.25
tCK (avg)
tDQSH
0.35
0.35
tCK (avg)
DQS input low pulse width
tDQSL
0.35
0.35
tCK (avg)
DQS falling edge to CK setup time
tDSS
0.2
0.2
tCK (avg)
DQS falling edge hold time from CK
tDSH
0.2
0.2
tCK (avg)
Mode register set command cycle time
tMRD
2
2
nCK
Write postamble
tWPST
0.4
0.6
0.4
0.6
tCK (avg)
Write preamble
tWPRE
0.35
0.35
tCK (avg)
Address and control input hold time
tIH (base) 250
275
ps
5
Address and control input setup time
tIS (base) 175
200
ps
4
Read preamble
tRPRE
0.9
1.1
0.9
1.1
tCK (avg) 11
Read postamble
tRPST
0.4
0.6
0.4
0.6
tCK (avg) 12
Active to precharge command
tRAS
45
70000
45
70000
ns
Active to auto-precharge delay
tRAP
tRCD min.
tRCD min.
ns
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