Datasheet

Table 56: Electrical Characteristics and AC Operating Conditions for Speed Extensions (Continued)
Notes 1–8 apply to the entire table
Parameter Symbol
DDR3L-1866 DDR3L-2133
Unit NotesMin Max Min Max
ACTIVATE-to-ACTIVATE minimum command pe- riod
x4/x8/x16 (2KB page size)
t
RRD MIN = greater of 4CK or 6ns CK 31
Four ACTIVATE windows
x4/x8/x16 (2KB page size)
t
FAW 35 – 35 – ns 31
Write recovery time
t
WR MIN = 15ns; MAX = N/A ns 31, 32,
33
Delay from start of internal WRITE transac- tion to internal READ command
t
WTR MIN = greater of 4CK or 7.5ns; MAX = N/A CK 31, 34
READ-to-PRECHARGE time
t
RTP MIN = greater of 4CK or 7.5ns; MAX = N/A CK 31, 32
CAS#-to-CAS# command delay
t
CCD MIN = 4CK; MAX = N/A CK
Auto precharge write recovery + precharge time
t
DAL MIN = WR +
t
RP/
t
CK (AVG); MAX = N/A CK
MODE REGISTER SET command cycle time
t
MRD MIN = 4CK; MAX = N/A CK
MODE REGISTER SET command update delay
t
MOD MIN = greater of 12CK or 15ns; MAX = N/A CK
MULTIPURPOSE REGISTER READ burst end to mode register set for multipurpose register exit
t
MPRR MIN = 1CK; MAX = N/A CK
Calibration Timing
ZQCL command: Long calibration time
POWER-UP and RE- SET operation
t
ZQinit MIN = N/A
MAX = MAX(512nCK, 640ns)
CK
Normal operation
t
ZQoper MIN = N/A
MAX = max(256nCK, 320ns)
CK
ZQCS command: Short calibration time MIN = N/A
MAX = max(64nCK, 80ns)
t
ZQCS
CK
Initialization and Reset Timing
Exit reset from CKE HIGH to a valid command
t
XPR MIN = greater of 5CK or
t
RFC + 10ns; MAX = N/A CK
Begin power supply ramp to power supplies stable
t
VDDPR MIN = N/A; MAX = 200 ms
RESET# LOW to power supplies stable
t
RPS MIN = 0; MAX = 200 ms
RESET# LOW to I/O and R
TT
High-Z
t
IOZ MIN = N/A; MAX = 20 ns 35
Refresh Timing
8Gb: x4, x8, x16 DDR3L SDRAM
Electrical Characteristics and AC Operating Conditions
86
Rev 2.0 June 2016
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