NTC Proprietary
Level: Property
DDR3(L)-2Gb SDRAM
NT5CB(C)256M8JQ/NT5CB(C)128M16JR
AC & DC Input Measurement Levels
DDR3 AC and DC Logic Input Levels for Command and Address
DDR3
U
ni
t
Symbol
Parameter
1600
1866,2133
Min
Notes
Min
Vref + 0.1
VSS
Max
VDD
Max
VDD
VIH.CA(DC100)
VIL.CA(DC100)
VIH.CA(AC175)
VIL.CA(AC175)
VIH.CA(AC150)
VIL.CA(AC150)
VIH.CA(AC135)
VIL.CA(AC135)
VIH.CA(AC125)
VIL.CA(AC125)
DC input logic high
DC input logic low
AC input logic high
AC input logic low
AC input logic high
AC input logic low
AC input logic high
AC input logic low
AC input logic high
AC input logic low
Vref + 0.1
V
V
V
V
V
V
V
V
V
V
1, 5
Vref - 0.1
VSS
Vref - 0.1
1, 6
Vref + 0.175
Note 2
-
-
1, 2, 7
1, 2, 8
1, 2, 7
1, 2, 8
1, 2, 7
1, 2, 8
1, 2, 7
1, 2, 8
Note 2
Vref - 0.175
-
-
Vref + 0.150
Note 2
-
-
Note 2
Vref - 0.150
-
-
-
-
-
-
-
-
-
-
Vref + 0.135
Note 2
Note 2
Vref - 0.135
Note 2
Vref - 0.125
Vref + 0.125
Note 2
Reference Voltage for ADD,
CMD inputs
VRefCA(DC)
0.49 * VDD
0.51 * VDD
0.49 * VDD
0.51 * VDD
V
3, 4, 9
NOTE 1. For input only pins except REET. Vref = VrefCA(DC).
NOTE 2. See “Overshoot and Undershoot Specifications” .
NOTE 3. The ac peak noise on VRef may not allow VRef to deviate from VRefCA(DC) by more than +/-1% VDD (for reference: approx. +/- 15
mV).
NOTE 4. For reference: approx. VDD/2 +/- 15 mV.
NOTE 5. VIH(dc) is used as a simplified symbol for VIH.CA(DC100)
NOTE 6. VIL(dc) is used as a simplified symbol for VIL.CA(DC100)
NOTE 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 + 0.175V is referenced, VIH.CA(AC150) value is used when Vref + 0.150V is referenced, VIH.CA(AC135)
value is used when Vref + 0.135V is referenced, and VIH.CA(AC125) value is used when Vref + 0.125V is referenced.
NOTE 8. VIL(ac) is used as a simplified symbol for VIL.CA(AC175), VIL.CA(AC150), VIL.CA(AC135) and VIL.CA(AC125); VIL.CA(AC175) value
is used when Vref - 0.175V is referenced, VIL.CA(AC150) value is used when Vref - 0.150V is referenced, VIL.CA(AC135) value is
used when Vref - 0.135V is referenced, and VIL.CA(AC125) value is used when Vref - 0.125V is referenced.
NOTE 9. VrefCA(DC) is measured relative to VDD at the same point in time on the same device
Version 1.4
05/2019
86
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