EtronTech
EM68916CWQA
Exit active power down to read command
2
8-AL
2
-
-
2
7-AL
2
-
-
2
6-AL
2
-
-
1
1, 2
tXARD
tCK
tCK
tCK
ns
Exit active power down to read command(slow
exit, lower power)
tXARDS
ODT turn-on delay
2
2
2
14
tAOND
tAC(max)
+0.7
tAC(max)
+0.7
tAC(max)+
1
ODT turn-on
tAC(min)
6, 14, 36
tAON
tAC(min)
tAC(min)
2 tCK
+tAC(max
)+1
2 tCK
+tAC(max
)+1
2 tCK
+tAC(max)
+1
tAC(min)+
2
tAC(min)+
2
tAC(min)+
2
ODT turn-on (Power-Down mode)
tAONPD
ns
ODT turn-off delay
2.5
2.5
2.5
2.5
2.5
2.5
15, 40, 41
15, 39, 41
tAOFD
tCK
ns
tAC(max)
0.6
tAC(max)
0.6
tAC(max)
+
0.6
+
+
ODT turn-off
tAOF
tAC(min)
tAC(min)
tAC(min)
2.5 tCK
+tAC(max
)+1
2.5 tCK
+tAC(max
)+1
2.5 tCK
+tAC(max)
+1
tAC(min)+
2
tAC(min)+
2
tAC(min)+
2
ODT turn-off (Power-Down mode)
tAOFPD
ns
ODT to power down entry latency
3
8
2
0
0
-
-
3
8
2
0
0
-
-
3
8
2
0
0
-
-
tANPD
tCK
tCK
tCK
ns
ns
ODT power down exit latency
tAXPD
Mode register set command cycle time
-
-
-
tMRD
MRS command to ODT update delay
12
12
12
12
12
12
28
28
tMOD
OCD drive mode output delay
tOIT
Minimum time clocks remains ON after CKE
asynchronously drops LOW
tIS+ tCK
+tIH
tIS+ tCK
+tIH
tIS+ tCK
+tIH
-
-
-
13
tDelay
ns
Refresh to active/Refresh command time
75
-
-
7.8
-
75
-
-
7.8
-
75
-
-
7.8
-
tRFC
ns
µs
ns
ns
ns
ns
Average periodic refesh interval
tREFI
RAS# to CAS# Delay time
15
15
60
45
15
15
60
45
15
15
60
45
tRCD
Row precharge Delay time
-
-
-
tRP
Row cycle Delay time
-
-
-
tRC
Row active Delay time
70k
70k
70k
tRAS
Etron Confidential
27
Rev. 1.1
Apr. 2009
ETRON [ ETRON TECHNOLOGY, INC. ]
