AS4C4M4F0
AS4C4M4F1
®
CAS-before-RAS self refresh cycle
tRP
tRASS
tRPS
RAS
tRPC
tCP
tRPC
tCSR
tCHS
UCAS,
LCAS
tCEZ
DQ
Typical DC and AC characteristics
Normalized access time tRAC
vs. supply voltage VCC
1.5
Normalized access time tRAC
vs. ambient temperature Ta
Typical access time tRAC
vs. load capacitance CL
1.5
100
1.4
1.4
1.3
1.2
1.1
1.0
0.9
0.8
90
80
70
60
50
40
30
Ta = 25°C
1.3
-70
1.2
1.1
1.0
0.9
0.8
-60
-50
4.0
4.5
5.0
5.5
–55
–10
35
80
50
100
150
200 250
6.0
125
Supply voltage (V)
Ambient temperature (°C)
Load capacitance (pF)
Typical supply current ICC
vs. supply voltage VCC
Typical supply current ICC
vs. ambient temperature Ta
Typical power-on current I
vs. cycle rate 1/tRC
PO
170
160
150
140
130
120
110
100
170
160
150
140
130
120
110
100
35
30
25
20
15
10
5
-50
-50
-60
-70
-60
-70
0.0
4.0
4.5
5.0
5.5
–55
–10
35
80
2
4
6
8
6.0
125
10
Supply voltage (V)
Ambient temperature (°C)
Cycle rate (MHz)
4/11/01; v.0.9
Alliance Semiconductor
P. 15 of 18
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
