Table 57: Electrical Characteristics and AC Operating Conditions for Speed Extensions (Continued)
Notes 1–8 apply to the entire table
DDR3-1866
DDR3-2133
Parameter
Symbol
Min
Max
Min
Max
Unit Notes
Power-Down Entry Minimum Timing
ACTIVATE command to power-down entry
tACTPDEN
tPRPDEN
MIN = 2
MIN = 2
CK
CK
PRECHARGE/PRECHARGE ALL command to
power-down entry
REFRESH command to power-down entry
MRS command to power-down entry
tREFPDEN
tMRSPDEN
tRDPDEN
MIN = 2
MIN = tMOD (MIN)
CK
CK
CK
37
READ/READ with auto precharge command
to power-down entry
MIN = RL + 4 + 1
WRITE command to
power-down entry
BL8 (OTF, MRS)
BC4OTF
tWRPDEN
tWRPDEN
MIN = WL + 4 +
tWR/tCK (AVG)
CK
CK
CK
CK
BC4MRS
MIN = WL + 2 +
tWR/tCK (AVG)
WRITE with auto pre-
charge command to
power-down entry
BL8 (OTF, MRS)
BC4OTF
tWRAP-
DEN
tWRAP-
DEN
MIN = WL + 4 + WR + 1
BC4MRS
MIN = WL + 2 + WR + 1
Power-Down Exit Timing
DLL on, any valid command, or DLL off to
commands not requiring locked DLL
tXP
MIN = greater of 3CK or 6ns;
MAX = n/a
CK
CK
Precharge power-down with DLL off to
commands requiring a locked DLL
tXPDLL
MIN = greater of 10CK or 24ns; MAX = n/a
28
ODT Timing
R
R
R
R
TT synchronous turn-on delay
ODTL on
ODTL off
tAON
tAOF
tAONPD
CWL + AL - 2CK
CWL + AL - 2CK
CK
CK
ps
38
40
TT synchronous turn-off delay
TT turn-on from ODTL on reference
TT turn-off from ODTL off reference
–195
0.3
195
0.7
–180
0.3
180
0.7
23, 38
39, 40
38
CK
ns
Asynchronous RTT turn-on delay
(power-down with DLL off)
MIN = 2; MAX = 8.5
Asynchronous RTT turn-off delay
(power-down with DLL off)
tAOFPD
ODTH8
MIN = 2; MAX = 8.5
MIN = 6; MAX = n/a
ns
40
ODT HIGH time with WRITE command and
BL8
CK
MICRON [ MICRON TECHNOLOGY ]
