AS4C1M16F5
®
AC parameters common to all waveforms
-50
-60
Symbol
tRC
Parameter
Min
84
30
50
8
Max
–
Min
104
40
60
10
15
12
10
50
5
Max
–
Unit Notes
Random read or write cycle time
RAS precharge time
ns
ns
ns
ns
tRP
–
–
tRAS
tCAS
tRCD
tRAD
tRSH
tCSH
tCRP
tASR
tRAH
tT
RAS pulse width
10K
10K
35
25
–
10K
10K
43
30
–
CAS pulse width
RAS to CAS delay time
RAS to column address delay time
CAS to RAS hold time
15
12
10
40
5
ns
ns
ns
ns
ns
ns
ns
6
7
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
–
–
0
–
0
–
8
–
10
1
–
1
50
16
–
50
16
–
ns 4,5
tREF
tCP
–
–
ms
ns
ns
ns
ns
3
CAS precharge time
8
10
30
0
tRAL
tASC
tCAH
Column address to RAS lead time
Column address setup time
Column address hold time
25
0
–
–
–
–
8
10
–
Read cycle
-50
-60
Symbol
tRAC
Parameter
Min
–
Max
50
13
25
–
Min
–
Max
60
17
30
–
Unit Notes
ns
Access time from RAS
6
tCAC
Access time from CAS
–
–
ns 6,13
ns 7,13
ns
tAA
Access time from address
Read command setup time
Read command hold time to CAS
Read command hold time to RAS
–
–
tRCS
0
0
tRCH
0
–
0
–
ns
ns
9
9
0
–
0
–
tRRH
4/11/01; v.0.9.1
Alliance Semiconductor
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