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
REFRESH-to-ACTIVATE or REFRESH command period
t
RFC – 1Gb MIN = 110; MAX = 70,200 ns
t
RFC – 2Gb MIN = 160; MAX = 70,200 ns
t
RFC – 4Gb MIN = 260; MAX = 70,200 ns
t
RFC – 8Gb MIN = 350; MAX = 70,200 ns
Maximum refresh period
T
C
≤ 85°C – 64 (1X) ms 36
T
C
> 85°C 32 (2X) ms 36
Maximum average periodic refresh
T
C
≤ 85°C
t
REFI 7.8 (64ms/8192) μs 36
T
C
> 85°C 3.9 (32ms/8192) μs 36
Self Refresh Timing
Exit self refresh to commands not requiring a locked DLL
t
XS MIN = greater of 5CK or
t
RFC + 10ns; MAX = N/A CK
Exit self refresh to commands requiring a locked DLL
t
XSDLL MIN =
t
DLLK (MIN);
MAX = N/A
CK 28
Minimum CKE low pulse width for self re- fresh entry to self refresh exit timing
t
CKESR MIN =
t
CKE (MIN) + CK; MAX = N/A CK
Valid clocks after self refresh entry or power- down entry
t
CKSRE MIN = greater of 5CK or 10ns; MAX = N/A CK
Valid clocks before self refresh exit, power-down exit, or reset exit
t
CKSRX MIN = greater of 5CK or 10ns; MAX = N/A CK
Power-Down Timing
CKE MIN pulse width
t
CKE (MIN) Greater of 3CK or 5ns CK
Command pass disable delay
t
CPDED MIN = 2;
MAX = N/A
CK
Power-down entry to power-down exit tim- ing
t
PD MIN =
t
CKE (MIN);
MAX = 9 * tREFI
CK
Begin power-down period prior to CKE registered HIGH
t
ANPD WL - 1CK CK
Power-down entry period: ODT either synchronous or asynchronous
PDE Greater of
t
ANPD or
t
RFC - REFRESH command to CKE LOW time CK
Power-down exit period: ODT either synchronous or asynchronous
PDX
t
ANPD +
t
XPDLL CK
Power-Down Entry Minimum Timing
8Gb: x4, x8, x16 DDR3L SDRAM
Electrical Characteristics and AC Operating Conditions
87
Rev 2.0 June 2016
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