K4B2G1646C-HCF8 View Datasheet(PDF) - Samsung
Part Name
Description
Manufacturer
K4B2G1646C-HCF8 Datasheet PDF : 64 Pages
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K4B2G1646C
datasheet
Rev. 1.11
DDR3 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
DDR3-800/1066/1333/1600
Min.
Max.
DDR3-1866/2133
Min.
Max.
Unit NOTE
VIH.CA(DC100) DC input logic high
VIL.CA(DC100) DC input logic low
VIH.CA(AC175) AC input logic high
VIL.CA(AC175) AC input logic low
VIH.CA(AC150) AC input logic high
VREF + 100
VSS
VREF + 175
Note 2
VREF+150
VDD
VREF - 100
Note 2
VREF - 175
Note 2
VREF + 100
VSS
-
-
-
VDD
VREF - 100
-
-
-
mV 1,5
mV 1,6
mV 1,2,7
mV 1,2,8
mV 1,2,7
VIL.CA(AC150) AC input logic low
VIH.CA(AC135) AC input logic high
Note 2
-
VREF-150
-
-
VREF + 135
-
Note 2
mV 1,2,8
mV 1,2,7
VIL.CA(AC135) AC input logic low
-
-
Note 2
VREF - 135
mV 1,2,8
VIH.CA(AC125) AC input logic high
-
-
VREF+125
Note 2
mV 1,2,7
VIL.CA(AC125) AC input logic low
-
-
Note 2
VREF-125
mV 1,2,8
VREFCA(DC)
Reference Voltage for ADD,
CMD 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 = VREFCA(DC)
2. See ’Overshoot/Undershoot Specification’ on page 18.
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(DC100)
6. VIL(dc) is used as a simplified symbol for VIL.CA(DC100)
7. VIH(ac) is used as a simplified symbol for VIH.CA(AC175), VIH.CA(AC150), VIH.CA(AC135) and VIH.CA(AC125); VIH.CA(AC175) value is used when VREF + 175mV is referenced
, VIH.CA(AC150) value is used when VREF + 150mV is referenced, VIH.CA(AC135) value is used when VREF + 135mV is referenced and VIH.CA(AC125) value is used when
VREF + 125mV is referenced.
8. VIL(ac) is used as a simplified symbol for VIL.CA(AC175) and VIL.CA(AC150), VIL.CA(AC135) and VIL.CA(AC125); VIL.CA(AC175) value is used when VREF - 175mV is refer-
enced, VIL.CA(AC150) value is used when VREF - 150mV is referenced, VIL.CA(AC135) value is used when VREF - 135mV is referenced and VIL.CA(AC125) value is used
when VREF - 125mV is referenced.
[ Table 8 ] Single-ended AC & DC input levels for DQ and DM
Symbol
Parameter
DDR3-800/1066
Min.
Max.
DDR3-1333/1600
Min.
Max.
DDR3-1866/2133
Min.
Max.
Unit NOTE
VIH.DQ(DC100) DC input logic high
VREF + 100
VDD
VREF + 100
VDD
VREF + 100
VDD
mV 1,5
VIL.DQ(DC100) DC input logic low
VSS
VREF - 100
VSS
VREF - 100
VSS
VREF - 100 mV 1,6
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
VIH.DQ(AC135) AC input logic high
-
-
-
-
VREF + 135 NOTE 2
mV 1,2,7
VIL.DQ(AC135) AC input logic low
-
-
-
-
NOTE 2
VREF - 135 mV 1,2,8
VREFDQ(DC)
Reference Voltage for DQ,
DM inputs
0.49*VDD
0.51*VDD
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 18.
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.DQ(DC100)
6. VIL(dc) is used as a simplified symbol for VIL.DQ(DC100)
7. VIH(ac) is used as a simplified symbol for VIH.DQ(AC175), VIH.DQ(AC150) and VIH.DQ(AC135) ; 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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