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EM428M1684RTA-7FE Datasheet(PDF) 7 Page - Eorex Corporation

Part # EM428M1684RTA-7FE
Description  512Mb (8M횞4Bank횞16) Double DATA RATE SDRAM
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Manufacturer  EOREX [Eorex Corporation]
Direct Link  http://www.eorex.com
Logo EOREX - Eorex Corporation

EM428M1684RTA-7FE Datasheet(HTML) 7 Page - Eorex Corporation

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eorex
EM42BM1684RTA
Jul. 2006
www.eorex.com
7/19
AC Operating Test Conditions
(VDD=2.5V±0.2V, TA=0°C ~70°C)
Item
Conditions
Output Reference Level
1.25V/1.25V
Output Load
See diagram as below
Input Signal Level
VREF+0.31V/ VREF-0.31V
Transition Time of Input Signals
1ns
Input Reference Level
VDDQ/2
AC Operating Test Characteristics
(VDD=2.5V±0.2V, TA=0°C ~70°C)
-5
-6
-7.5
Symbol
Parameter
Min.
Max.
Min.
Max.
Min.
Max.
Units
tDQCK
DQ output access from CLK,/CLK
-0.65
0.65
-0.7
0.7
-0.75
0.75
ns
tDQSCK
DQS output access from CLK,/CLK
-0.55
0.55
-0.6
0.6
-0.75
0.75
ns
tCL,tCH
CL low/high level width
0.45
0.55
0.45
0.55
0.45
0.55
tCK
CL=2
-
-
7.5
12
10
12
ns
CL=2.5
6
12
6
12
7.5
12
ns
tCK
Clock Cycle Time
CL=3
5
12
-
-
-
-
ns
tDH,tDS
DQ and DM hold/setup time
0.4
0.45
0.5
ns
tDIPW
DQ and DM input pulse width for
each input
1.75
1.75
1.75
ns
tHZ,tLZ
Data out high/low impedance time
from CLK,/CLK
-0.7
0.7
-0.7
0.7
-0.75
0.75
ns
tDQSQ
DQS-DQ skew for associated DQ
signal
0.4
0.45
0.5
ns
tDQSS
Write command to first latching DQS
transition
0.7
1.25
0.75
1.25
0.75
1.25
tCK
tDSL,tDS
H
DQS input valid window
0.35
0.35
0.35
tCK
tMRD
Mode Register Set command cycle
time
2
2
2
tCK
tWPRES
Write Preamble setup time
0
0
0
ns
tWPST
Write Preamble
0.4
0.6
0.4
0.6
0.4
0.6
tCK
tIH,tIS
Address/control input hold/setup
time
0.7
0.8
1.0
ns
tRPRE
Read Preamble
0.9
1.1
0.9
1.1
0.9
1.1
tCK


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