MC-458CA721ESA-A10 データシートの表示（PDF） - Elpida Memory, Inc
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MC-458CA721ESA-A10 Datasheet PDF : 16 Pages
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MC-458CA721ESA, 458CA721PSA, 458CA721XSA
Asynchronous Characteristics
Parameter
Symbol
-A 80
-A 10
Unit Note
MIN.
MAX.
MIN.
MAX.
ACT to REF/ACT command period (Operation)
tRC
70
70
ns
REF to REF/ACT command period (Refresh)
tRC1
70
70
ns
ACT to PRE command period
tRAS
48
120,000
50
120,000 ns
PRE to ACT command period
tRP
20
20
ns
Delay time ACT to READ/WRITE command
tRCD
20
20
ns
ACT(one) to ACT(another) command period
tRRD
16
20
ns
Data-in to PRE command period
tDPL
8
10
ns
Data-in to ACT(REF) command /CAS latency = 3
tDAL3
1CLK+20
1CLK+20
ns
period (Auto precharge)
/CAS latency = 2
tDAL2
1CLK+20
1CLK+20
ns
Mode register set cycle time
tRSC
2
2
CLK
Transition time
tT
0.5
30
1
30
ns
Refresh time (4,096 refresh cycles)
tREF
64
64
ms
Data Sheet E0067N10
9
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