EBE21AE8ACFA-6E-E Ver la hoja de datos (PDF) - Elpida Memory, Inc
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EBE21AE8ACFA-6E-E Datasheet PDF : 27 Pages
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EBE21AE8ACFA
AC Characteristics (TC = 0°C to +85°C, VDD, VDDQ = 1.8V ± 0.1V, VSS, VSSQ = 0V)
(DDR2 SDRAM Component Specification)
• 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.
Frequency (Mbps)
Parameter
/CAS latency
Active to read or write command delay
Precharge command period
Active to active/auto-refresh command time
DQ output access time from CK, /CK
DQS output access time from CK, /CK
CK high-level width
CK low-level width
Symbol
CL
tRCD
tRP
tRC
tAC
tDQSCK
tCH (avg)
tCL(avg)
CK half period
tHP
Clock cycle time
tCK (avg)
DQ and DM input hold time
tDH (base)
DQ and DM input setup time
tDS (base)
Control and Address input pulse width for each input tIPW
DQ and DM input pulse width for each input
tDIPW
Data-out high-impedance time from CK,/CK
tHZ
DQS, /DQS low-impedance time from CK,/CK
tLZ (DQS)
DQ low-impedance time from CK,/CK
tLZ (DQ)
DQS-DQ skew for DQS and associated DQ signals
tDQSQ
DQ hold skew factor
tQHS
DQ/DQS output hold time from DQS
tQH
DQS latching rising transitions to associated clock edges tDQSS
DQS input high pulse width
tDQSH
DQS input low pulse width
tDQSL
DQS falling edge to CK setup time
tDSS
DQS falling edge hold time from CK
tDSH
Mode register set command cycle time
tMRD
Write postamble
tWPST
Write preamble
tWPRE
Address and control input hold time
tIH (base)
Address and control input setup time
tIS (base)
Read preamble
tRPRE
Read postamble
tRPST
Active to precharge command
tRAS
Active to auto-precharge delay
tRAP
Active bank A to active bank B command period
tRRD
-6E
667
min.
5
15
15
60
−450
−400
0.48
0.48
Min.(tCL(abs),
tCH(abs))
3000
175
100
0.6
0.35
tAC min.
2 × tAC min.
tHP – tQHS
−0.25
0.35
0.35
0.2
0.2
2
0.4
0.35
275
200
0.9
0.4
45
tRCD min.
7.5
max.
5
+450
+400
0.52
0.52
8000
tAC max.
tAC max.
tAC max.
240
340
+0.25
0.6
1.1
0.6
70000
Unit
nCK
ns
ns
ns
ps
ps
tCK (avg)
tCK (avg)
ps
ps
ps
ps
tCK (avg)
tCK (avg)
ps
ps
ps
ps
ps
ps
tCK (avg)
tCK (avg)
tCK (avg)
tCK (avg)
tCK (avg)
nCK
tCK (avg)
tCK (avg)
ps
ps
tCK (avg)
tCK (avg)
ns
ns
ns
Notes
10
10
13
13
6, 13
13
5
4
10
10
10
7
8
5
4
11
12
Data Sheet E1199E10 (Ver. 1.0)
16
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