EM47CM1688SBB
AC and DC Output Measurement Levels
Note
Symbol
Parameter
Specification
Units
VOH(DC)
VOM(DC)
VOL(DC)
VOH(AC)
VOL(AC)
DC output high measurement level (for IV curve linearity)
DC output middle measurement level (for IV curve linearity)
DC output low measurement level (for IV curve linearity)
AC output high measurement level (for output slew rate)
AC output low measurement level (for output slew rate)
0.8*VDDQ
0.5*VDDQ
V
V
V
V
V
0.2*VDDQ
VTT+0.1*VDDQ
VTT-0.1*VDDQ
1
1
2
VOHdiff(DC) AC differential output high measurement level (for output
slew rate)
0.2*VDDQ
-0.2*VDDQ
V
V
VOLdiff(DC) AC differential output low measurement level (for output
slew rate)
2
Notes1. The swing of ±0.1 × VDDQ is based on approximately 50% of the static single-ended output high or
low swing with a driver impedance of 34Ω and an effective test load of 25Ω to VTT = VDDQ/2 at each of the
differential outputs.
Notes2. The swing of ±0.2 × VDDQ is based on approximately 50% of the static single-ended output high or
low swing with a driver impedance of 34Ω and an effective test load of 25Ω to VTT = VDDQ/2 at each of the
differential outputs.
DQS Output Crossing Voltage - VOX (DDR3-1600 or Higher Speed Bin)
DQS, /DQS differential slew rate
5V/ns 6V/ns 7V/ns 8V/ns 9V/ns 10V/ns 11V/ns 12V/ns
Symbol
Parameters
Unit
mV
Deviation of DQS,
/DQS output
cross point
voltage from
0.5*VDDQ
VOX (AC) max.
+100 +120 +140 +160 +180
-100 -120 -140 -160 -180
+200
-200
+200
-200
+200
-200
VOX (AC) min.
mV
DQS Output Crossing Voltage - VOX (DDR3-1333 or Lower Speed Bin)
DQS, /DQS differential slew rate
5V/ns 6V/ns 7V/ns 8V/ns 9V/ns 10V/ns 11V/ns 12V/ns
Symbol
Parameters
Unit
mV
Deviation of DQS,
/DQS output
cross point
voltage from
0.5*VDDQ
VOX (AC) max.
+125 +150 +175 +200 +225
-125 -150 -175 -200 -225
+225
-225
+225
-225
+225
-225
VOX (AC) min.
mV
Notes1. Measured using an effective test load of 25Ω to 0.5* VDDQ at each of the differential outputs.
Notes2. For a differential slew rate in between the listed values, the VOX value may be obtained by linear
interpolation.
Notes3. The DQS, /DQS pins under test are not required to be able to drive each of the slew rates listed in the
table; the pins under test will provide one VOX value when tested with specified test condition. The DQS and
/DQS differential slew rate when measuring VOX determines which VOX limits to use.
Jun. 2012
12/38
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EOREX [ EOREX CORPORATION ]
