Datasheet

Rev. 1.0/Sep. 2012 22
AC & DC Output Measurement Levels
Single Ended AC and DC Output Levels
Table below shows the output levels used for measurements of single ended signals.
Notes:
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 40 Ω and an effective test load of 25 Ω to V
TT
= V
DDQ
/ 2.
Differential AC and DC Output Levels
Table below shows the output levels used for measurements of single ended signals.
Notes:
1. The swing of ±0.2 x V
DDQ
is based on approximately 50% of the static differential output high or low
swing with a driver impedance of 40 Ω and an effective test load of 25 Ω to V
TT
= V
DDQ
/2 at each of the
differential outputs.
Single-ended AC and DC Output Levels
Symbol Parameter
DDR3-800, 1066,
1333 and 1600
Unit Notes
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
Differential AC and DC Output Levels
Symbol Parameter
DDR3-800, 1066,
1333 and 1600
Unit Notes
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