EM638165
EtronTech
Table 16. Electrical Characteristics and Recommended A.C. Operating Conditions
±
(VDD = 3.3V 0.3V, TA = - 40~85°C) (Note: 5, 6, 7, 8)
-5I
-6I
-7I
Symbol
A.C. Parameter
Row cycle time
Unit Note
Min.
Max.
Min.
Max.
Min.
Max.
tRC
55
-
60
-
63
-
(same bank)
RAS# to CAS# delay
(same bank)
tRCD
tRP
tRRD
tRAS
15
15
10
40
-
18
18
12
42
-
21
21
14
42
-
Precharge to refresh/row activate
command (same bank)
-
-
-
-
-
-
ns
Row activate to row activate delay
(different banks)
Row activate to precharge time
(same bank)
100K
100K
100K
Write recovery time
tWR
2
1
-
2
1
-
2
1
-
tCK
CAS# to CAS# Delay time
-
tCCD
-
-
9
CL* = 2
10
7
-
-
-
9
-
tCK
Clock cycle time
CL* = 3
-
5
-
6
-
10
10
10
Clock high time
Clock low time
2.5
2.5
-
-
tCH
tCL
2
-
2.5
2.5
-
-
-
2
-
-
CL* = 2
CL* = 3
6
-
-
6
Access time from CLK
(positive edge)
tAC
-
5.4
-
4.5
-
5.4
ns
9
Data output hold time
2.5
0
-
tOH
tLZ
2
-
2.5
0
-
Data output low impedance
Data output high impedance
-
0
-
-
-
5.4
8
tHZ
-
4.5
-
5.4
Data/Address/Control Input set-up time
Data/Address/Control Input hold time
Power Down Exit set-up time
1.5
0.8
IS+tCK
2
-
10
10
tIS
1.5
0.8
-
1.5
0.8
-
-
tIH
-
-
t
-
tPDE
tMRD
tREFI
tXSR
tIS+tCK
-
tIS+tCK
-
Mode Register Set Command Cycle Time
Average Refresh Interval Time
-
15.6
-
tCK
µs
ns
2
-
-
15.6
-
2
-
-
15.6
-
-
Exit Self-Refresh to any Command
t
RC+tIS
tRC+tIS
tRC+tIS
*
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. 5.2
19
Rev. 5.2
Dec. /2013
ETRON [ ETRON TECHNOLOGY, INC. ]
