EM47EM1688SBB_15 Datasheet, PDF (20/39 Pages) Eorex Corporation – Double DATA RATE 3 SDRAM

EM47EM1688SBB
(VDD, VDDQ=1.5V±0.075V)
Symbol
tREFPDEN
tMRSPDEN
tCPDED
tACTPDEN
tPRPDEN
tRDPDEN
tAON
tAONPD
tAOF
tAOFPD
ODTH4
ODTH8
Speed Bin
CL-nRCD-nRP
Parameter
Timing of REF command to power-
down entry
Timing of MRS command to power-
down entry
Command pass disable delay
Timing of ACT command to power-
down entry
Timing of PRE command to power-
down entry
Timing of RD/RDA command to
power-down entry
RTT turn-on
Asynchronous RTT turn-on delay
(Power-down with DLL frozen)
RTT_Nom and RTT_WR turn-off time
from ODTLoff reference
Asynchronous RTT turn-off delay
(Power-down with DLL frozen)
ODT high time without write command
or with write command and BC4
ODT high time with write command
and BL8
tADC
RTT dynamic change skew
-125
(DDR3-1600)
11-11-11
Min. Max.
1
-
tMOD
-
(min)
1
-
1
-
1
-
RL + 4
-
+1
-225
225
2
8.5
0.3
0.7
2
8.5
4
-
6
-
0.3
0.7
tZQinit
Power-up and reset calibration time
512
-
tZQoper
Normal operation full calibration time
256
-
tZQCS
Normal operation short calibration time
64
-
tWLMRD
First DQS pulse rising edge after write
40
-
leveling mode is programmed
tWLDQSEN
DQS./DQS delay after write leveling
mode is programmed
25
-
Read to write command delay
tRTW
(BC4MRS, BC4OTF)
RL + tCCD/2
+
-
2nCK-WL
Read to write command delay
tRTW
(BL8MRS, BL8OTF)
tRAP
Active to read with auto precharge
command delay
RL + tCCD/2
+
-
2nCK-WL
tRCD min
-
-150
(DDR3-1333)
9-9-9
Min. Max.
1
-
tMOD
-
(min)
1
-
1
-
1
-
RL + 4
-
+1
-250 250
2
8.5
0.3
0.7
2
8.5
4
-
6
-
0.3
0.7
512
-
256
-
64
-
40
-
25
-
RL +
tCCD/2 +
2nCK-W
-
L
RL +
tCCD/2 +
2nCK-W
-
L
tRCD
-
min
Units Notes
nCK ^20,2
1
nCK
nCK 20
nCK 20
nCK
ps
7
ns
tCK
8
(avg)
ns
nCK
nCK
tCK
(avg)
nCK
nCK
nCK 23
nCK 3
nCK 3
Oct. 2013
20/39
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