AS4LC256K16E0-35 查看數據表（PDF） - Alliance Semiconductor
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AS4LC256K16E0-35 Datasheet PDF : 25 Pages
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EDO page mode cycle
Std
Symbol
tPC
tCAP
tCP
tPCM
tCRW
tRASP
Parameter
Read or write cycle time (fast page)
Access time from CAS precharge
CAS precharge time (fast page)
EDO page mode RMW cycle
Page mode CAS pulse width (RMW)
RAS pulse width
®
-35
Min Max
15
–
–
19
4
–
56
–
44
–
35 75K
-45
Min Max
17
–
–
21
5
–
58
–
46
–
45 75K
AS4LC256K16EO
-60
Min Max Unit
25
– ns
–
23 ns
6
– ns
60
– ns
50
– ns
60 75K ns
Notes
14
13
Refresh cycle
Std
Symbol Parameter
tCSR
CAS setup time (CAS-before-RAS)
tCHR
CAS hold time (CAS-before-RAS)
tRPC
RAS precharge to CAS hold time
tCPT
CAS precharge time
(CAS-before-RAS counter test)
-35
Min Max
10
–
8
–
0
–
8
–
-45
Min Max
10
–
8
–
0
–
8
–
-60
Min Max Unit
10
– ns
10
– ns
0
– ns
8
– ns
Notes
3
3
Output enable
Std
Symbol Parameter
tROH RAS hold time referenced to OE
tOEA
OE access time
tOED
OE to data delay
tOEZ
Output buffer turnoff delay from OE
tOEH
OE command hold time
-35
Min Max
5
–
–
10
5
–
–
8
8
–
-45
Min Max
5
–
–
10
5
–
–
8
8
–
-60
Min Max Unit
5
– ns
–
10 ns
8
– ns
–
8 ns
8
– ns
Notes
8
Self refresh cycle
Std Symbol Parameter
RAS pulse width
tRASS
(CBR self refresh)
tRPS
RAS precharge time
(CBR self refresh)
tCHS
CAS hold time
(CBR self refresh)
-35
Min Max
100K –
-45
Min Max
-60
Min Max Unit
100K – 100K – ns
85
–
85
–
85
– ns
30
–
30
–
30
– ns
Notes
4/11/01; V.1.1
Alliance Semiconductor
P. 7 of 25
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