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