Table 56: Electrical Characteristics and AC Operating Conditions (Continued)
Notes 1–8 apply to the entire table
DDR3-800
Min Max
DDR3-1066
Min Max
DDR3-1333
Min Max
DDR3-1600
Min Max
Parameter
Symbol
Unit Notes
Exit self refresh to commands not requiring a
locked DLL
tXS
MIN = greater of 5CK or tRFC + 10ns; MAX = n/a
CK
Exit self refresh to commands requiring a
locked DLL
tXSDLL
tCKESR
tCKSRE
tCKSRX
MIN = tDLLK (MIN); MAX = n/a
CK
CK
CK
CK
28
Minimum CKE low pulse width for self re-
fresh entry to self refresh exit timing
MIN = tCKE (MIN) + CK; MAX = n/a
Valid clocks after self refresh entry or power-
down entry
MIN = greater of 5CK or 10ns; MAX = n/a
MIN = greater of 5CK or 10ns; MAX = n/a
Valid clocks before self refresh exit,
power-down exit, or reset exit
Power-Down Timing
CKE MIN pulse width
tCKE (MIN) Greater of 3CK
Greater of 3CK
or 5.625ns
Greater of 3CK
or 5.625ns
Greater of 3CK
or 5ns
CK
or 7.5ns
Command pass disable delay
tCPDED
tPD
MIN = 1; MAX = n/a
CK
CK
Power-down entry to power-down exit tim-
ing
MIN = tCKE (MIN); MAX = 9 * tREFI
WL - 1CK
Begin power-down period prior to CKE
registered HIGH
tANPD
CK
CK
CK
Power-down entry period: ODT either
synchronous or asynchronous
PDE
PDX
Greater of tANPD or tRFC - REFRESH command to CKE LOW time
tANPD + tXPDLL
Power-down exit period: ODT either
synchronous or asynchronous
Power-Down Entry Minimum Timing
ACTIVATE command to power-down entry
tACTPDEN
tPRPDEN
MIN = 1
MIN = 1
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 = 1
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)
MIN = WL + 2 + tWR/tCK (AVG)
CK
CK
BC4MRS
MICRON [ MICRON TECHNOLOGY ]
