K4B2G0446D Datasheet, PDF (19/64 Pages) Samsung semiconductor – 2Gb D-die DDR3L SDRAM

K4B2G0446D
K4B2G0846D
datasheet
Rev. 1.01
DDR3L SDRAM
8.5 Slew rate definition for Differential Input Signals
See 14.3 “Address/Command Setup, Hold and Derating :” on page 50 for single-ended slew rate definitions for address and command signals.
See 14.4 “Data Setup, Hold and Slew Rate Derating :” on page 56 for single-ended slew rate definitions for data signals.
8.6 Slew rate definitions for Differential Input Signals
Input slew rate for differential signals (CK, CK and DQS, DQS) are defined and measured as shown in Table 15 and Figure 5.
[ Table 15 ] Differential input slew rate definition
Description
Differential input slew rate for rising edge (CK-CK and DQS-DQS)
Measured
From
To
V_ILdiffmax
V_IHdiffmin
Differential input slew rate for falling edge (CK-CK and DQS-DQS)
V_IHdiffmin
NOTE :
The differential signal (i.e. CK - CK and DQS - DQS) must be linear between these thresholds.
V_ILdiffmax
Defined by
V_IHdiffmin - V_ILdiffmax
Delta TRdiff
V_IHdiffmin - V_ILdiffmax
Delta TFdiff
V_IHdiffmin
0
V_ILdiffmax
delta TFdiff
delta TRdiff
Figure 5. Differential Input Slew Rate definition for DQS, DQS, and CK, CK
9. AC & DC Output Measurement Levels
9.1 Single-ended AC & DC Output Levels
[ Table 16 ] Single-ended AC & DC output levels
Symbol
Parameter
DDR3-800/1066/1333/1600
Units NOTE
V_OH(DC)
V_OM(DC)
V_OL(DC)
V_OH(AC)
V_OL(AC)
DC output high measurement level (for IV curve linearity)
DC output mid measurement level (for IV curve linearity)
DC output low measurement level (for IV curve linearity)
AC output high measurement level (for output SR)
AC output low measurement level (for output SR)
0.8 x V_DDQ
0.5 x V_DDQ
0.2 x V_DDQ
V_TT + 0.1 x V_DDQ
V_TT - 0.1 x V_DDQ
V
V
V
V
1
V
1
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.
9.2 Differential AC & DC Output Levels
[ Table 17 ] Differential AC & DC output levels
Symbol
Parameter
DDR3-800/1066/1333/1600
Units NOTE
V_OHdiff(AC)
V_OLdiff(AC)
AC differential output high measurement level (for output SR)
AC differential output low measurement level (for output SR)
+0.2 x V_DDQ
-0.2 x V_DDQ
V
1
V
1
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.
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