Datasheet

AC and DC Output Measurement Levels
Single-ended AC & DC Output Levels
NOTE : 1. The swing of +/-0.1 x VDDQ 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 VTT=VDDQ/2.
Differential AC & DC Output Levels
NOTE : 1. The swing of +/-0.2xVDDQ 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 VTT=VDDQ/2 at each of the differential outputs.
Single-ended Output Slew Rate
With the reference load for timing measurements, output slew rate for falling and rising edges is defined and measured
between VOL(AC) and VOH(AC) for single ended signals.
NOTE : Output slew rate is verified by design and characterization, and may not be subject to production
test.
Symbol
Parameter
DDR3-1600
Units Notes
VOH(DC) DC output high measurement level (for IV curve linearity) 0.8 x VDDQ V
VOM(DC) DC output mid measurement level (for IV curve linearity) 0.5 x VDDQ V
VOL(DC) DC output low measurement level (for IV curve linearity) 0.2 x VDDQ V
VOH(AC) AC output high measurement level (for output SR) VTT + 0.1 x VDDQ V 1
VOL(AC) AC output low measurement level (for output SR) VTT - 0.1 x VDDQ V 1
Symbol Parameter
DDR3-1600
Units Notes
VOHdiff(AC) AC differential output high measurement level (for output SR) +0.2 x VDDQ V 1
VOLdiff(AC) AC differential output low measurement level (for output SR) -0.2 x VDDQ V 1
Description
Measured
Defined by
From To
Single ended output slew rate for rising edge VOL(AC) VOH(AC) VOH(AC)-VOL(AC)
Delta TRse
Single ended output slew rate for falling edge VOH(AC) VOL(AC) VOH(AC)-VOL(AC)
Delta TRse
Single-ended Output Slew Rate definition
Confidential
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Rev.1.1 April 2017
AS4C256M16D3B-12BIN
AS4C256M16D3B-12BCN