EM47EM1688SBC
AC Operating Test Characteristics
(VDD, VDDQ=1.5V±0.075V)
Speed Bin
-125 (DDR3-1600)
-150 (DDR3-1333)
Symbol
Units Notes
ns
CL-nRCD-nRP
Parameter
11-11-11
9-9-9
Min.
Max.
-
Min.
Max.
-
tRFC(min)
+ 10
tRFC(min)
+ 10
Exit self-refresh to commands not
requiring a locked DLL
tXS
5
-
-
5
-
-
nCK
nCK
Exit self-refresh to commands
requiring a locked DLL
tXSDLL
tRFC
tDLL(min)
tDLL(min)
Auto-refresh to active/auto-refresh
command
260
-
-
260
-
-
ns
Average periodic refresh interval
0℃≦TC≦+85℃
7.8
7.8
µs
tREFI
5
3
-
-
5.625
3
-
-
ns
CKE minimum high and low pulse
width
tCKE
tXPR
nCK
tRFC(min)
+ 10
tRFC(min)
+ 10
-
-
ns
Exit reset from CKE high to a valid
command
5
512
-
5
512
-
nCK
nCK
15
DLL locking time
-
9*tREFI
-
-
9*tREFI
-
tDLLK
tPD
Power-down entry to exit time
tCKE(min)
24
tCKE(min)
24
Exit precharge power-down with
DLL frozen to commands requiring
a locked DLL
ns
2
tXPDLL
10
6
-
-
10
6
-
-
nCK
Exit power-down with DLL on to any
valid command; Exit precharge
power-down with DLL frozen to
commands not requiring a locked
DLL
ns
tXP
3
-
3
-
nCK
Timing of WR command to power-
down entry
tWRPDEN
(min)
WL + 4 + [tWR / tCK(avg)]
WL + 2 + [tWR / tCK(avg)]
nCK
(BL8OTF, BL8MRS, BL4OTF)
9
Timing of WR command to power-
down entry
tWRPDEN
(min)
nCK
(BC4MRS)
Timing of WRA command to power-
down entry
WL + 4 +
WR + 1
WL + 4 +
WR + 1
-
-
-
-
nCK
nCK
10
10
tWRAPDEN
tWRAPDEN
(BL8OTF, BL8MRS, BL4OTF)
Timing of WRA command to power-
down entry
WL + 2 +
WR + 1
WL + 2 +
WR + 1
(BC4MRS)
AC Operating Test Characteristics
Oct. 2014
19/37
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