EM42CM1684RTA
AC Operating Test Characteristics (Continued)
(VDD=2.5V±0.2V)
-6
-75
Symbol
Parameter
Units
Min.
0.4
Max.
0.6
Min.
0.4
Max.
0.6
tRPST
tRAS
tRC
Read Postamble
tCK
ns
ns
Active to Precharge command period
Active to Active command period
42
60
70k
-
45
65
120k
-
tRFC
tRCD
tRP
Auto Refresh Row Cycle Time
Active to Read or Write delay
Precharge command period
72
18
18
12
-
-
-
-
75
20
20
15
-
-
-
-
ns
ns
ns
ns
tRRD
Active bank A to B command period
tRAP
Active to READ with Auto Precharge command
DQS write Preamble
18
-
-
20
-
-
ns
tWPRE
0.25
0.25
tCK
tWR
tWTR
tXSNR
tXSRD
tREFI
Write Recovery time
15
1
-
15
1
-
ns
tCK
ns
tCK
us
Internal WRITE to READ command delay
Exit self Refresh to non-read command
Exit self Refresh to read command
Average periodic refresh interval
-
-
-
-
75
200
-
75
200
-
-
-
7.8
7.8
Jan. 2012
www.eorex.com
10/22
EOREX [ EOREX CORPORATION ]
