EM48AM1684VTG
AC Operating Test Characteristics (Continued)
(VDD=3.3V±0.3V, TA=0°C ~70°C/TA=-25°C ~ +85°C for extended grade)
-6
-7
Symbol
tRC
Parameter
Units
ns
Min. Max.. Min.
Max.
100K
ACTIVE to ACTIVE Command Period
60
42
18
18
12
1
65
45
20
20
15
1
(Note 6)
ACTIVE to PRECHARGE Command
Period (Note 6)
tRAS
tRP
100K
ns
PRECHARGE to ACTIVE Command
Period (Note 6)
ns
ACTIVE to READ/WRITE Delay Time
tRCD
tRRD
tCCD
tDPL
ns
(Note 6)
ACTIVE(one) to ACTIVE(another)
Command (Note 6)
ns
READ/WRITE Command to
READ/WRITE Command
CLK
CLK
CLK
Date-in to PRECHARGE Command
Date-in to BURST Stop Command
2
2
tBDL
1
1
Data-out to High
Impedance from
PRECHARGE Command
CL=3
CL=2
3
2
3
2
tROH
CLK
tSREX
tWR
tDQW
tREF
Self Refresh Exit Time
1
2
0
1
2
0
CLK
CLK
CLK
ms
Write Recovery Time, Auto precharge
DQM Write Mask Latency
Refresh Time (8,192 cycle)
64
64
* All voltages referenced to VSS.
Note 6: These parameters account for the number of clock cycles and depend on the operating
frequency of the clock, as follows:
The number of clock cycles = Specified value of timing/clock period (Count Fractions as a
whole number)
Jun. 2010
10/20
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