eorex
(V
DD
, V
DDQ
=3.3V±0.3V, V
SS
=0V)
Symbol
t
RC
t
RAS
t
RP
t
RCD
t
RRD
t
CCD
t
DPL
t
WR
t
DQW
t
DQZ
t
REF
t
SREX
Parameter
ACTIVE to ACTIVE Command
(Note 6)
Period
ACTIVE to PRECHARGE
(Note 6)
Command Period
PRECHARGE to ACTIVE
(Note 6)
Command Period
ACTIVE to READ/WRITE Delay
(Note 6)
Time
ACTIVE(one) to ACTIVE(another)
(Note 6)
Command
READ/WRITE Command to
READ/WRITE Command
Date-in to PRECHARGE
Command
Write Recovery Time for Auto
Precharge
DQM Write Mask Latency
DQM Data out Disable Latency
Refresh Time (4,096 cycles)
Self Refresh Exit Time
-6
Min.
60
42
15
15
12
1
2
2
0
-
-
1
Max.
-
100k
-
-
-
-
-
-
-
2
64
-
EM488M1644VTF
AC Operating Test Characteristics (Continued)
-7
Min.
63
45
15
15
14
1
2
2
0
-
-
1
Max.
-
100k
-
-
-
-
-
-
-
2
64
-
Units
ns
ns
ns
ns
ns
CLK
CLK
CLK
CLK
CLK
ms
CLK
* All voltages referenced to V
SS
.
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)
Jan. 2011
8/18
www.eorex.com
EOREX [ EOREX CORPORATION ]
