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K4B2G0446D Datasheet, PDF (12/64 Pages) Samsung semiconductor – 2Gb D-die DDR3L SDRAM
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K4B2G0446D
K4B2G0846D
datasheet
Rev. 1.01
DDR3L SDRAM
8. AC & DC Input Measurement Levels
8.1 AC & DC Logic input levels for single-ended signals
[ Table 7 ] Single-ended AC & DC input levels for Command and Address
Symbol
Parameter
Min.
DDR3-800/1066/1333/1600
Max.
Unit NOTE
1.35V
VIH.CA(DC90) DC input logic high
VIL.CA(DC90) DC input logic low
VREF + 90
VSS
VDD
VREF - 90
mV 1,5a)
mV 1,6a)
VIH.CA(AC160) AC input logic high
VIL.CA(AC160) AC input logic low
VREF + 160
Note 2
Note 2
VREF - 160
mV 1,2
mV 1,2
VIH.CA(AC135) AC input logic high
VIL.CA(AC135) AC input logic lowM
VREF+135
Note 2
Note 2
VREF-135
mV 1,2
mV 1,2
VREFCA(DC)
Reference Voltage for ADD,
CMD inputs
0.49*VDD
0.51*VDD
V
3,4
1.5V
VIH.CA(DC100) DC input logic high
VREF + 100
VDD
mV 1,5b)
VIL.CA(DC100) DC input logic low
VSS
VREF - 100
mV 1,6b)
VIH.CA(AC175) AC input logic high
VIL.CA(AC175) AC input logic low
VIH.CA(AC150) AC input logic high
VIL.CA(AC150) AC input logic low
VREF + 175
Note 2
VREF+150
Note 2
Note 2
VREF - 175
Note 2
VREF-150
mV 1,2,7
mV 1,2,8
mV 1,2,7
mV 1,2,8
VREFCA(DC)
Reference Voltage for ADD,
CMD inputs
0.49*VDD
0.51*VDD
V
3,4
NOTE :
1. For input only pins except RESET, VREF = VREFCA(DC)
2. See "Overshoot and Undershoot specifications" section.
3. The AC peak noise on VREF may not allow VREF to deviate from VREF(DC) by more than ± 1% VDD (for reference : approx. ± 15mV)
4. For reference : approx. VDD/2 ± 15mV
5. VIH(dc) is used as a simplified symbol for VIH.CA(a) 1.35V : DC90, b) 1.5V : DC100)
6. VIL(dc) is used as a simplified symbol for VIL.CA(a) 1.35V : DC90, b) 1.5V : DC100)
7. VIH(ac) is used as a simplified symbol for VIH.CA(AC175) and VIH.CA(AC150); VIH.CA(AC175) value is used when VREF + 175mV is referenced and VIH.CA(AC150) value is
used when VREF + 150mV is referenced.
8. VIL(ac) is used as a simplified symbol for VIL.CA(AC175) and VIL.CA(AC150); VIL.CA(AC175) value is used when VREF - 175mV is referenced and VIL.CA(AC150) value is used
when VREF - 150mV is referenced.
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