eorex
EM44CM1688LBA
AC Operating Test Characteristics
(VDD=1.8V±0.1V, TA=0°C ~85°C)
-25
Symbol
tDQCK
Parameter
Units
Min.
-0.4
Max.
DQ output access from
CLK,/CLK
+0.4
ns
DQS output access time from
CLK,/CLK
tDQSCK
tCL,tCH
-0.35 +0.35
ns
tCK
ns
CL low/high level width
0.48
2.5
0.52
8
CAS Latency
=5
Clock Cycle
Time
CAS Latency
=4
CAS Latency
=3
tCK
3.75
5
8
8
ns
ns
tDS
tDH
tDIPW
DQ and DM setup time
DQ and DM hold time
50
-
-
ps
ps
125
DQ and DM input pulse width
for each input
Data out high impedance time
from CLK,/CLK
Data out low impedance time
from CLK,/CLK
0.35
-0.4
-0.4
-
tCK
ns
ns
+0.4
+0.4
tHZ
tLZ
DQS-DQ skew for associated
DQ signal
tDQSQ
tQSH
-
-
0.2
ns
ns
tCK
Data hold skew factor
0.34
Write command to first
latching DQS transition
DQS Low/High input pulse
width
WL
-0.25
WL
+0.25
tDQSS
tDQSL,tDQSH
0.35
0.2
2
-
-
-
tCK
tCK
tCK
tDSL,tDSH DQS input valid window
Mode Register Set command
cycle time
tMRD
tWPRES
tWPRE
tWPST
Write Preamble setup time
Write Preamble
0
-
-
ns
tCK
tCK
0.35
0.4
Write Postamble
0.6
Address/control input setup
time
tIS
0.175
-
ns
Address/control input hold
time
tIH
0.25
0.9
-
ns
tRPRE
Read Preamble
1.1
tCK
Feb. 2009
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EOREX [ EOREX CORPORATION ]
