AS4LC4M16S0
AS4LC16M4S0
®
AC parameters common to all waveforms
-75
-8
-10F
Max
-10
CAS
Sym
Parameter
latency Min Max Min Max
Min
20
20
20
50
70
Min
20
30
30
60
90
Max Unit Notes
tRRD Row active to row active delay
tRCD RAS to CAS delay time
tRP Row precharge
15
20
20
44
66
–
–
–
–
–
20
20
20
50
70
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
ns
ns
ns
ns
ns
1
1
1
1
1
tRAS Row active
tRC Row cycle time
Last data in to new column
address delay
tCDL
1
–
1
–
1
–
1
–
CLK
2
tRDL Last data in to row precharge
tBDL Last data in to burst stop
2
1
–
–
2
1
–
–
2
1
–
–
2
1
–
–
CLK
CLK
2
2
Column address to column
address delay
tCCD
1
–
1
–
1
–
1
–
CLK
ns
3
3
2
3
2
3
2
7.5
10
5.4
6
–
–
–
–
–
–
–
–
–
–
–
6
6
–
–
8
10
6
–
–
–
–
–
–
–
–
–
–
–
7
7
–
–
10
15
6
–
–
–
–
–
–
–
–
–
–
–
7
7
–
–
10
15
6
–
–
–
–
–
–
–
–
–
–
–
7
7
–
–
4
4
tCK CLK cycle time
4,5,7
4,5,7
4,5,7
4,5,7
6
tAC CLK to valid output delay @ 50pF
tOH Output data hold time @ 50 pF
ns
ns
6
6
6
2.7
3
3
3
3
3
3
3
tCH CLK high pulse width
tCL CLK low pulse width
tAS Add setup time
2.5
2.5
1.5
0.8
1
3
3
3
ns
ns
ns
ns
ns
3
3
3
6
2
2
2
6
tAH Add hold time
1
1
1
6
tSLZ CLK to output in low Z
1
1
1
5
3
2
–
–
–
–
tSHZ CLK to output in high Z
ns
–
–
–
–
tCKH CKEhold time
tCKS CKE setup time
0.8
1.5
1
1
1
ns
ns
2
2
2
CS, RAS, CAS, WE, DQM hold
tCMH
time
0.8
1.5
–
–
1
2
–
–
1
2
–
–
1
2
–
–
ns
ns
CS, RAS, CAS, WE, DQM setup
tCMS
time
tDH Data in hold time
tDS Data in setup time
0.8
1.5
–
–
1
2
–
–
1
2
–
–
1
2
–
–
ns
ns
8
ALLIANCE SEMICONDUCTOR
7/ 5/ 00
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
