Rev. 1.1
Unbuffered SODIMM
datasheet
DDR3 SDRAM
[ Table 20 ] Timing Parameters by Speed Bins for DDR3-1600, DDR3-1866 (Cont.)
Speed
Parameter
Command and Address Timing
DLL locking time
DDR3-1600
DDR3-1866
Units
NOTE
Symbol
MIN
MAX
MIN
MAX
tDLLK
tRTP
512
-
-
512
-
-
nCK
max
max
internal READ Command to PRECHARGE Command delay
e
(4nCK,7.5ns)
(4nCK,7.5ns)
Delay from start of internal write transaction to internal read com-
mand
max
(4nCK,7.5ns)
max
(4nCK,7.5ns)
tWTR
-
-
e,18
e
WRITE recovery time
tWR
15
4
-
-
15
4
-
-
ns
Mode Register Set command cycle time
tMRD
nCK
max
(12nCK,15ns)
max
(12nCK,15ns)
Mode Register Set command update delay
CAS# to CAS# command delay
tMOD
tCCD
-
-
-
-
4
4
nCK
nCK
WR + roundup (tRP /
tCK(AVG))
Auto precharge write recovery + precharge time
tDAL(min)
Multi-Purpose Register Recovery Time
tMPRR
tRAS
1
-
1
-
nCK
ns
22
e
ACTIVE to PRECHARGE command period
See “Speed Bins and CL, tRCD, tRP, tRC and tRAS for corresponding Bin” on page 42
max
(4nCK,6ns)
max
(4nCK, 5ns)
ACTIVE to ACTIVE command period for 1KB page size
ACTIVE to ACTIVE command period for 2KB page size
tRRD
tRRD
-
-
-
-
e
e
max
(4nCK,7.5ns)
max
(4nCK, 6ns)
Four activate window for 1KB page size
Four activate window for 2KB page size
tFAW
tFAW
30
40
-
-
27
35
-
-
ns
ns
e
e
tIS(base)
AC175
45
-
-
-
-
-
-
-
-
-
-
ps
ps
ps
ps
b,16
b,16
tIS(base)
AC150
170
Command and Address setup time to CK, CK referenced to
V
(AC) / V (AC) levels
IH
IL
tIS(base)
AC135
-
-
65
150
b,16
tIS(base)
AC125
b,16,27
Command and Address hold time from CK, CK referenced to
(AC) / V (AC) levels
tIH(base)
DC100
120
560
-
-
100
535
-
-
ps
ps
b,16
28
V
IH
IL
Control & Address Input pulse width for each input
Calibration Timing
tIPW
Power-up and RESET calibration time
Normal operation Full calibration time
Normal operation short calibration time
Reset Timing
tZQinitI
tZQoper
tZQCS
512
256
64
-
-
-
max(512nCK,640ns)
max(256nCK,320ns)
max(64nCK,80ns)
-
-
-
nCK
nCK
nCK
23
max(5nCK, tRFC +
10ns)
max(5nCK, tRFC +
10ns)
Exit Reset from CKE HIGH to a valid command
Self Refresh Timing
tXPR
-
-
max(5nCK,tRFC +
10ns)
max(5nCK,tRFC +
10ns)
Exit Self Refresh to commands not requiring a locked DLL
tXS
-
-
Exit Self Refresh to commands requiring a locked DLL
Minimum CKE low width for Self refresh entry to exit timing
tXSDLL
tCKESR
tDLLK(min)
-
-
tDLLK(min)
-
-
nCK
tCKE(min) + 1tCK
tCKE(min) + 1nCK
Valid Clock Requirement after Self Refresh Entry (SRE) or Power-
Down Entry (PDE)
max(5nCK,
10ns)
max(5nCK,
10ns)
tCKSRE
tCKSRX
-
-
-
-
Valid Clock Requirement before Self Refresh Exit (SRX) or Power-
Down Exit (PDX) or Reset Exit
max(5nCK,
10ns)
max(5nCK,
10ns)
- 32 -