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datasheet DDR3L SDRAM
Rev. 1.0
Unbuffered DIMM
11.4 Slew Rate Definition for Single Ended Input Signals
See "Address / Command Setup, Hold and Derating" for single-ended slew rate definitions for address and command signals.
See "Data Setup, Hold and Slew Rate Derating" for single-ended slew rate definitions for data signals.
11.5 Slew rate definition for Differential Input Signals
Input slew rate for differential signals (CK, CK and DQS, DQS) are defined and measured as shown in below.
[ Table 9 ] Differential input slew rate definition
NOTE : The differential signal (i.e. CK - CK and DQS - DQS) must be linear between these thresholds
Figure 6. Differential input slew rate definition for DQS, DQS and CK, CK
12. AC & DC Output Measurement Levels
12.1 Single Ended AC and DC Output Levels
[ Table 10 ] Single Ended AC and DC output levels
NOTE : 1. The swing of +/-0.1 x V
DDQ
is based on approximately 50% of the static single ended output high or low swing with a driver impedance of 40Ω and an effective test
load of 25Ω to V
TT
=V
DDQ
/2.
12.2 Differential AC and DC Output Levels
[ Table 11 ] Differential AC and DC output levels
NOTE : 1. The swing of +/-0.2xV
DDQ
is based on approximately 50% of the static single ended output high or low swing with a driver impedance of 40Ω and an effective test
load of 25Ω to V
TT
=V
DDQ
/2 at each of the differential outputs.
Description
Measured
Defined by
From To
Differential input slew rate for rising edge (CK-CK
and DQS-DQS)
V
ILdiffmax
V
IHdiffmin
V
IHdiffmin
- V
ILdiffmax
Delta TRdiff
Differential input slew rate for falling edge (CK-CK
and DQS-DQS)
V
IHdiffmin
V
ILdiffmax
V
IHdiffmin
- V
ILdiffmax
Delta TFdiff
Symbol Parameter DDR3-800/1066/1333/1600 Units NOTE
V
OH
(DC) DC output high measurement level (for IV curve linearity) 0.8 x V
DDQ
V
V
OM
(DC) DC output mid measurement level (for IV curve linearity) 0.5 x V
DDQ
V
V
OL
(DC) DC output low measurement level (for IV curve linearity) 0.2 x V
DDQ
V
V
OH
(AC) AC output high measurement level (for output SR) V
TT
+ 0.1 x V
DDQ
V1
V
OL
(AC) AC output low measurement level (for output SR) V
TT
- 0.1 x V
DDQ
V1
Symbol Parameter DDR3-800/1066/1333/1600 Units NOTE
V
OHdiff
(AC) AC differential output high measurement level (for output SR) +0.2 x V
DDQ
V1
V
OLdiff
(AC) AC differential output low measurement level (for output SR) -0.2 x V
DDQ
V1
V
IHdiffmin
0
V
ILdiffmax
delta TRdiff
delta TFdiff