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K4B2G0446D Datasheet, PDF (13/64 Pages) Samsung semiconductor – 2Gb D-die DDR3L SDRAM
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K4B2G0446D
K4B2G0846D
datasheet
Rev. 1.01
DDR3L SDRAM
[ Table 8 ] Single-ended AC & DC input levels for DQ and DM
Symbol
Parameter
DDR3-800/1066
Min.
Max.
DDR3-1333/1600
Min.
Max.
Unit NOTE
1.35V
VIH.DQ(DC90) DC input logic high
VIL.DQ(DC90) DC input logic low
VIH.DQ(AC160) AC input logic high
VIL.DQ(AC160) AC input logic low
VIH.DQ(AC135) AC input logic high
VIL.DQ(AC135) AC input logic low
VREFDQ(DC)
Reference Voltage for DQ,
DM inputs
VREF + 90
VSS
VREF + 160
Note 2
VREF + 135
Note 2
0.49*VDD
VDD
VREF - 90
Note 2
VREF - 160
Note 2
VREF - 135
0.51*VDD
VREF + 90
VSS
-
-
VREF + 135
Note 2
0.49*VDD
VDD
VREF - 90
-
-
Note 2
VREF - 135
0.51*VDD
mV 1,5a)
mV 1,6a)
mV 1,2
mV 1,2
mV 1,2
mV 1,2
V
3,4
1.5V
VIH.DQ(DC100) DC input logic high
VREF + 100
VDD
VREF + 100
VDD
mV 1,5b)
VIL.DQ(DC100) DC input logic low
VSS
VREF - 100
VSS
VREF - 100
mV 1,6b)
VIH.DQ(AC175) AC input logic high
VREF + 175
NOTE 2
-
-
mV 1,2,7
VIL.DQ(AC175) AC input logic low
NOTE 2
VREF - 175
-
-
mV 1,2,8
VIH.DQ(AC150) AC input logic high
VREF + 150
NOTE 2
VREF + 150
NOTE 2
mV 1,2,7
VIL.DQ(AC150) AC input logic low
NOTE 2
VREF - 150
NOTE 2
VREF - 150
mV 1,2,8
VREFDQ(DC)
Reference Voltage for DQ,
DM inputs
0.49*VDD
0.51*VDD
0.49*VDD
0.51*VDD
V
3,4
NOTE :
1. For input only pins except RESET, VREF = VREFDQ(DC)
2. See ’Overshoot/Undershoot Specification’ on page 22.
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.DQ(AC175), VIH.DQ(AC150) ; VIH.DQ(AC175) value is used when VREF + 175mV is referenced, VIH.DQ(AC150) value is used
when VREF + 150mV is referenced.
8. VIL(ac) is used as a simplified symbol for VIL.DQ(AC175), VIL.DQ(AC150) ; VIL.DQ(AC175) value is used when VREF - 175mV is referenced, VIL.DQ(AC150) value is used when
VREF - 150mV is referenced.
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