AS4C14400
®
AC parameters common to all waveforms
-40
Symbol
t
RC
t
RP
t
RAS
t
CAS
t
RCD
t
RAD
t
RSH(R)
t
CSH
t
CRP
t
ASR
t
RAH
t
T
t
REF
t
CLZ
Parameter
Random read or write cycle time
RAS precharge time
RAS pulse width
CAS pulse width
RAS to CAS delay time
RAS to column address delay time
CAS to RAS hold time (read)
RAS to CAS hold time
CAS to RAS precharge time
Row address setup time
Row address hold time
Transition time (rise and fall)
Refresh period
CAS to output in low Z
Min
70
20
40
10
18
13
10
40
0
0
8
2
–
0
Max
–
–
10K
–
30
20
–
–
–
–
–
50
16
–
Min
90
30
50
13
20
15
13
50
0
0
10
2
–
0
-50
Max
–
–
10K
–
37
25
–
–
–
–
–
50
16
–
Min
110
40
60
15
20
15
15
60
0
0
10
2
–
0
-60
Max
–
–
10K
–
45
30
–
–
–
–
–
50
16
–
Min
130
50
70
18
20
15
18
70
0
0
10
2
–
0
-70
Max
–
–
10K
–
52
35
–
–
–
–
–
50
16
–
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
4,5
3
8
6
7
Notes
Shaded areas contain advance information.
Read cycle
-40
Symbol
t
RAC
t
CAC
t
AA
t
AR(R)
t
RCS
t
RCH
t
RRH
t
RAL
t
CPN
t
ODS
t
OFF
Parameter
Access time from RAS
Access time from CAS
Access time from address
Column add hold from RAS
Read command setup time
Read command hold time to CAS
Read command hold time to RAS
Column address to RAS lead time
CAS precharge time
Output disable setup time
Output buffer turn-off time
Min
–
–
–
30
0
0
0
20
5
0
0
Max
40
10
20
–
–
–
–
–
–
–
10
Min
–
–
–
40
0
0
0
25
10
0
0
-50
Max
50
13
25
–
–
–
–
–
–
–
13
Min
–
–
–
45
0
0
0
30
10
0
0
-60
Max
60
15
30
–
–
–
–
–
–
–
15
Min
–
–
–
55
0
0
0
35
10
0
0
-70
Max
70
18
35
–
–
–
–
–
–
–
18
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
8,10
9
9
Notes
6
6,13
7,13
Shaded areas contain advance information.
4
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
