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