MT41J64M16JT-125G Datasheet, PDF (94/214 Pages) Micron Technology – DDR3 SDRAM MT41J256M4 – 32 Meg x 4 x 8 banks MT41J128M8 – 16 Meg x 8 x 8 banks MT41J64M16 – 8 Meg x 16 x 8 banks

Table 57: Electrical Characteristics and AC Operating Conditions for Speed Extensions (Continued)
Notes 1–8 apply to the entire table
Parameter
ACTIVATE command to power-down entry
PRECHARGE/PRECHARGE ALL command to
power-down entry
REFRESH command to power-down entry
MRS command to power-down entry
READ/READ with auto precharge command
to power-down entry
WRITE command to
power-down entry
BL8 (OTF, MRS)
BC4OTF
BC4MRS
WRITE with auto pre-
charge command to
power-down entry
BL8 (OTF, MRS)
BC4OTF
BC4MRS
DLL on, any valid command, or DLL off to
commands not requiring locked DLL
Precharge power-down with DLL off to
commands requiring a locked DLL
R_TT synchronous turn-on delay
R_TT synchronous turn-off delay
R_TT turn-on from ODTL on reference
R_TT turn-off from ODTL off reference
Asynchronous R_TT turn-on delay
(power-down with DLL off)
Asynchronous R_TT turn-off delay
(power-down with DLL off)
ODT HIGH time with WRITE command and
BL8
DDR3-1866
Symbol
Min
Max
Power-Down Entry Minimum Timing
t_ACTPDEN
MIN = 2
t_PRPDEN
MIN = 2
DDR3-2133
Min
Max
t_REFPDEN
t_MRSPDEN
t_RDPDEN
MIN = 2
MIN = ^tMOD (MIN)
MIN = RL + 4 + 1
t_WRPDEN
t_WRPDEN
t_WRAP-
DEN
t_WRAP-
DEN
t_XP
t_XPDLL
MIN = WL + 4 +
t_WR/t_{CK (AVG)}
MIN = WL + 2 +
t_WR/t_{CK (AVG)}
MIN = WL + 4 + WR + 1
MIN = WL + 2 + WR + 1
Power-Down Exit Timing
MIN = greater of 3CK or 6ns;
MAX = n/a
MIN = greater of 10CK or 24ns; MAX = n/a
ODT Timing
ODTL on
CWL + AL - 2CK
ODTL off
CWL + AL - 2CK
t_AON
–195
195
–180
180
t_AOF
0.3
0.7
0.3
0.7
t_AONPD
MIN = 2; MAX = 8.5
t_AOFPD
MIN = 2; MAX = 8.5
ODTH8
MIN = 6; MAX = n/a
Unit Notes
CK
CK
CK
37
CK
CK
CK
CK
CK
CK
CK
CK
28
CK
38
CK
40
ps 23, 38
CK 39, 40
ns
38
ns
40
CK