Samsung M391B5773DH0 AC & DC Output Measurement Levels, Single Ended AC and DC Output Levels

Unbuffered DIMM

datasheet

Rev. 1.0

DDR3L SDRAM

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

Description					Measured		Defined by
					From	To
					VILdiffmax	VIHdiffmin	VIHdiffmin - VILdiffmax
Differential input slew rate for rising edge (CK-CK and DQS-DQS)
							Delta TRdiff
					VIHdiffmin	VILdiffmax	VIHdiffmin - VILdiffmax
Differential input slew rate for falling edge (CK-CK and DQS-DQS)
							Delta TFdiff
NOTE : The differential signal (i.e. CK -		and DQS -		must be linear between these thresholds
	CK		DQS)

	VIHdiffmin
	0
	VILdiffmax
delta TFdiff	delta TRdiff

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

Symbol	Parameter	DDR3-800/1066/1333/1600	Units	NOTE
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

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.

12.2 Differential AC and DC Output Levels

[ Table 11 ] Differential AC and DC output levels

Symbol	Parameter	DDR3-800/1066/1333/1600	Units	NOTE
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

NOTE : 1. The swing of +/-0.2xVDDQis 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.

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