EM44CM1688LBA
AC Operating Test Characteristics (Continued)
(VDD=1.8V±0.1V, TA=0°C ~85°C)
Symbol
Units
Parameter
-25
-3
-37
Min.
0.4
Max.
0.6
Min.
0.4
Max.
0.6
Min.
0.4
Max.
0.6
Read Postamble
tRPST
tRAS
tCK
Active to Precharge command
period
45
70k
45
70k
45
70k
ns
Active to Active command period
Auto Refresh Row Cycle Time
tRC
57.5
-
-
60
-
-
60
-
-
ns
ns
tRFC
127.5
127.5
127.5
Active to Read or Write delay
tRCD
12.5
-
15
-
15
-
ns
Precharge command period
tRP
12.5
10
-
-
15
10
-
-
15
10
-
-
ns
ns
Active bank A to B command period
tRRD
Column address to column address
delay
tCCD
tWR
2
-
-
-
2
-
-
-
2
-
-
-
tCK
ns
ns
Write recover time
15
15
15
Auto precharge write recovery +
precharge time
tRP
tWR
+
tRP
tWR
+
tRP
tWR
+
tDAL
Exit active power-down mode to
read command (fast exit)
tXARD
tXARDS
tXP
2
-
-
2
-
-
2
-
-
tCK
tCK
tCK
Exit active power-down mode to
read command (slow exit)
8-AL
2
7-AL
2
6-AL
2
Exit precharge power-down to any
non-read command
-
-
-
-
-
-
Internal write to read command
delay
tWTR
tRTP
7.5
7.5
7.5
7.5
7.5
7.5
ns
ns
ns
Internal read to precharge delay
-
-
-
-
-
-
Exit self Refresh to non-read
command
tRFC
+10
tRFC
+10
tRFC
+10
tXSNR
Exit self Refresh to read command
Average periodic refresh interval
CKE minimum pulse width
-
7.8
-
-
7.8
-
-
7.8
-
tXSRD
tREFI
tCKE
200
200
200
tCK
us
tCK
-
-
-
3
3
3
Four active to Row active delay
(same bank)
tFAW
tOIT
45
0
50
0
50
0
ns
ns
OCD drive mode output delay
12
12
12
Jun. 2010
12/28
www.eorex.com
EOREX [ EOREX CORPORATION ]
