AS4C64M8D2
Exit active power down to read command
2
-
-
2
-
-
1
tXARD
tCK
tCK
Exit active power down to read command(slow exit,
lower power)
8-AL
7-AL
1, 2
tXARDS
ODT turn-on delay
ODT turn-on
2
2
2
2
16
tAOND
tAON
tCK
ns
tAC(max)+0.7
tAC(max)+0.7
6, 16, 38
tAC(min)
tAC(min)
2 tCK
+tAC(max)+1
2 tCK
+tAC(max)+1
ODT turn-on (Power-Down mode)
tAC(min)+2
tAC(min)+2
tAONPD
ns
ODT turn-off delay
ODT turn-off
2.5
2.5
2.5
2.5
17, 42
tAOFD
tAOF
tCK
ns
17, 41, 42
tAC(min)
t
tAC(min)
t
AC(max)+0.6
AC(max)+0.6
2.5 tCK
+tAC(max)+1
2.5 tCK
+tAC(max)+1
ODT turn-off (Power-Down mode)
tAC(min)+2
tAC(min)+2
tAOFPD
ns
ODT to power down entry latency
ODT power down exit latency
3
8
2
0
0
-
-
3
8
2
0
0
-
-
tANPD
tAXPD
tMRD
tMOD
tOIT
tCK
tCK
tCK
ns
ns
Mode register set command cycle time
MRS command to ODT update delay
OCD drive mode output delay
-
-
12
12
12
12
30
30
Minimum time clocks remains ON after CKE
asynchronously drops LOW
tIS+ tCK +tIH
-
tIS+ tCK +tIH
-
15
tDelay
tRFC
ns
Refresh to active/Refresh command time
105
-
-
105
7.8
3.9
15
-
43
43
43
ns
s
s
ns
ns
ns
ns
℃≦
@ 0
≦
℃
TC +85
-
-
Average periodic refresh
interval
tREFI
@ +85℃＜TC≦ +95℃
-
-
-
RAS# to CAS# Delay time
Row precharge Delay time
Row cycle Delay time
12.5
12.5
57.5
45
-
-
tRCD
tRP
-
-
15
-
-
60
tRC
Row active Delay time
70k
45
70k
tRAS
Confidential
25
Rev. 1.0
Feb. /2014
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
