EM639325
EtronTech
Table 11. Electrical Characteristics and Recommended A.C. Operating Conditions
±
(VDD = 3.3V 0.3V, TA = -40~85°C) (Note: 5~8)
-5I
-6I
-7I
Unit Note
Symbol
A.C. Parameter
Min. Max. Min. Max. Min. Max.
tRC
Row cycle time (same bank)
55
15
-
-
60
18
-
-
63
21
-
-
tRCD
tRP
RAS# to CAS# delay (same bank)
Precharge to refresh / row activate
command (same bank)
15
10
40
-
-
18
12
42
-
-
21
14
42
-
-
ns
tRRD
tRAS
Row activate to row active delay
(different banks)
Row activate to precharge time
(same bank)
100K
100K
100K
Write recovery time
2
1
-
-
2
1
-
2
1
-
tWR
tCK
CAS# to CAS# Delay time
-
-
9
tCCD
CL* = 2
-
-
10
6
-
10
7
-
Clock cycle time
tCK
CL* = 3
5
-
-
-
tCH
tCL
ns
Clock high time
Clock low time
2
-
2.5
2.5
-
-
2.5
2.5
-
-
10
10
2
-
-
6
-
6.5
5.4
-
CL* = 2
CL* = 3
-
-
Access time from CLK
(positive edge)
tAC
-
5
-
-
5.4
-
-
tOH
tLZ
tHZ
tIS
Data output hold time
2
2.5
1
2.5
1
9
Data output low impedance
1
-
-
-
ns
Data output high impedance CL* = 3
Data/Address/Control Input set-up time
Data/Address/Control Input hold time
PowerDown Exit Setup Time
-
5
-
-
5.4
-
-
5.4
-
8
1.5
0.8
1.5
0.8
1.5
0.8
10
10
tIH
-
-
-
ns
ns
tCK
µs
ns
t
IS+tCK
-
-
tIS+ CK
t
-
-
tIS+ CK
t
-
-
tPDE
tMRD
tREFI
tXSR
2
-
2
-
2
-
Mode Register Set Command Cycle Time
Refresh Interval Time
15.6
15.6
15.6
tRC+ IS
t
-
tRC+ IS
t
-
tRC+ IS
t
-
Exit Self-Refresh to any Command
*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 VSS. VIH (Max) = 4.6V for pulse width 3ns. VIL(Min) = -1.0V for pulse
≦
width
3ns.
3. These parameters depend on the cycle rate and these values are measured by the cycle rate under the
minimum value of tCK and tRC. Input signals are changed one time during every 2 tCK.
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
Rev. 2.1
20
Aug. /2015
ETRON [ ETRON TECHNOLOGY, INC. ]
