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MC-458CB647EFA-A75 Datasheet(PDF) 9 Page - Elpida Memory

Part # MC-458CB647EFA-A75
Description  8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE
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Manufacturer  ELPIDA [Elpida Memory]
Direct Link  http://www.elpida.com/en
Logo ELPIDA - Elpida Memory

MC-458CB647EFA-A75 Datasheet(HTML) 9 Page - Elpida Memory

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Data Sheet E0062N20
9
MC-458CB647
Asynchronous Characteristics
Parameter
Symbol
-A 75
Unit
Note
MIN.
MAX.
ACT to REF/ACT command period (operation)
tRC
67.5
ns
REF to REF/ACT command period (refresh)
tRC1
67.5
ns
ACT to PRE command period
tRAS
45
120,000
ns
PRE to ACT command period
tRP
20
ns
Delay time ACT to READ/WRITE command
tRCD
20
ns
ACT(one) to ACT(another) command period
tRRD
15
ns
Data-in to PRE command period
tDPL
8
ns
Data-in to ACT(REF) command
/CAS latency = 3
tDAL3
1CLK+22.5
ns
1
period (Auto precharge)
/CAS latency = 2
tDAL2
1CLK+20
ns
1
Mode register set cycle time
tRSC
2
CLK
Transition time
tT
0.5
30
ns
Refresh time (4,096 refresh cycles)
tREF
64
ms
Note This device can satisfy the tDAL3 spec of 1CLK+20 ns for up to and including 125 MHz operation.


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