EM44CM1688LBB
AC Operating Test Characteristics (Continued)
(VDD=1.8V±0.1V, TA=0°C ~70°C)
-25 (DDR2-800)
-3 (DDR2-667)
Symbol
Units
Parameter
Min.
0.4
Max.
Min.
0.4
45
Max.
Read Postamble
tRPST
tRAS
tRC
0.6
0.6
tCK
ns
ns
ns
ns
ns
ns
tCK
ns
Active to Precharge command period
Active to Active command period
Auto Refresh Row Cycle Time
Active to Read or Write delay
Precharge command period
Active bank A to B command period
Column address to column address delay
Write recover time
45
70k
70k
57.5
127.5
12.5
12.5
10
-
-
-
-
-
-
-
60
-
-
-
-
-
-
-
tRFC
tRCD
tRP
127.5
15
15
tRRD
tCCD
tWR
10
2
2
15
15
Auto precharge write recovery + precharge
time
tDAL
tXARD
tXARDS
tXP
tRP + tWR
-
-
-
-
tRP + tWR
-
-
-
-
ns
tCK
tCK
tCK
Exit active power-down mode to read
command (fast exit)
2
8-AL
2
2
7-AL
2
Exit active power-down mode to read
command (slow exit)
Exit precharge power-down to any non-read
command
Internal write to read command delay
Internal read to precharge delay
Exit self Refresh to non-read command
Exit self Refresh to read command
Average periodic refresh interval
CKE minimum pulse width
tWTR
tRTP
7.5
-
7.5
-
ns
ns
ns
tCK
us
tCK
ns
ns
7.5
-
7.5
-
-
tXSNR
tXSRD
tREFI
tCKE
tFAW
tOIT
tRFC +10
-
-
tRFC +10
200
-
200
-
-
7.8
-
7.8
-
3
3
Four active to Row active delay (same bank)
OCD drive mode output delay
45
0
50
0
12
12
Nov. 2010
13/29
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EOREX [ EOREX CORPORATION ]
