Datasheet
Table 10. Electrical Characteristics and Recommended A.C. Operating Conditions
(V
DD
= 3.3V
±
0.3V, T
A
= -40~85°C) (Note: 5~8)
Symbol
A.C. Parameter
-5 -6 -7
Unit
Note
Min.
Max.
Min.
Max.
Min.
Max.
t
RC
Row cycle time (same bank)
55
-
60
-
63
-
ns
t
RCD
RAS# to CAS# delay (same bank)
15
-
18
-
21
-
t
RP
Precharge to refresh / row activate
command
(same bank)
15
-
18
-
21
-
t
RRD
Row activate to row active delay
(different banks)
10
-
12
-
14
-
t
RAS
Row activate to precharge time
(same bank)
40
100K
42
100K
42
100K
t
WR
Write recovery time
2
-
2
-
2
-
t
CK
t
CCD
CAS# to CAS# Delay time
1
-
1
-
1
-
9
t
CK
Clock cycle time
CL* = 2
-
-
10
-
10
-
ns
CL* = 3
5
-
6
-
7
-
t
CH
Clock high time
2
-
2.5
-
2.5
-
10
t
CL
Clock low time
2
-
2.5
-
2.5
-
10
t
AC
Access time from CLK
(positive edge)
CL* = 2
-
-
-
6
-
6.5
CL* = 3
-
5
-
5.4
-
5.4
t
OH
Data output hold time
2
-
2.5
-
2.5
-
ns
9
t
LZ
Data output low impedance
1
-
1
-
1
-
t
HZ
Data output high impedance
CL* = 3
-
5
-
5.4
-
5.4
8
t
IS
Data/Address/Control Input set-up time
1.5
-
1.5
-
1.5
-
10
t
IH
Data/Address/Control Input hold time
0.8
-
0.8
-
0.8
-
ns
10
t
PDE
PowerDown Exit Setup Time
t
IS+
t
CK
-
t
IS+
t
CK
-
t
IS+
t
CK
-
ns
t
MRD
Mode Register Set Command Cycle Time
2
-
2
-
2
-
t
CK
t
REFI
Refresh Interval Time
-
15.6
-
15.6
-
15.6
µs
t
XSR
Exit Self-Refresh to any Command
t
RC+
t
IS
-
t
RC+
t
IS
-
t
RC+
t
IS
-
ns
*CL is CAS Latency.
Note:
1. Stress greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to
the device.
2. All voltages are referenced to V
SS
. VIH (Max) = 4.6V for pulse width
≦
3ns. VIL(Min) = -1.0V for pulse
width
≦
3ns.
3. These pa
rameters depend on the cycle rate and these values are measured by the cycle rate under the
minimum value of t
CK
and t
RC
. Input signals are changed one time during every 2 t
CK.
4. These parameters depend on the output loading. Specified values are obtained with the output open.
5. Power-up sequence is described in Note 11.
6. A.C. Test Conditions
AS4C4M32SA-6TIN
AS4C4M32SA-6TCN
AS4C4M32SA-7TCN
Confidential
-20/47-
Rev.1.0 Sep.2015