NTC Proprietary
Level: Property
DDR3(L)-2Gb SDRAM
NT5CB(C)256M8JQ/NT5CB(C)128M16JR
DDR3 AC and DC Logic Input Levels for DQ and DM
DDR3
Symbol
Parameter
1600
1866,2133
Unit Notes
Min
Max
Min
Max
VIH.DQ(DC100) DC input logic high
VIL.DQ(DC100) DC input logic low
VIH.DQ(AC175) AC input logic high
VIL.DQ(AC175) AC input logic low
VIH.DQ(AC150) AC input logic high
VIL.DQ(AC150) AC input logic low
VIH.DQ(AC135) AC input logic high
VIL.DQ(AC135) AC input logic low
Vref + 0.1
VDD
Vref + 0.1
VDD
V
V
V
V
V
V
V
V
1, 5
VSS
-
Vref - 0.1
-
VSS
Vref - 0.1
1, 6
-
-
-
-
-
1, 2, 7
1, 2, 8
1, 2, 7
1, 2, 8
1, 2, 7
1, 2, 8
-
-
-
Vref + 0.150
Note 2
Vref + 0.135
Note 2
Note 2
Vref - 0.150
Note 2
Vref - 0.135
-
-
Vref + 0.135
Note 2
Note 2
Vref - 0.135
Reference Voltage
VRefDQ(DC)
0.49 * VDD
0.51 * VDD
0.49 * VDD
0.51 * VDD
V
3, 4, 9
for DQ, DM inputs
NOTE 1. Vref = VrefDQ(DC).
NOTE 2. See “Overshoot and Undershoot Specifications” .
NOTE 3. The ac peak noise on VRef may not allow VRef to deviate from VRefDQ(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.DQ(DC100)
NOTE 6. VIL(dc) is used as a simplified symbol for VIL.DQ(DC100)
NOTE 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 + 0.175V is referenced, VIH.DQ(AC150) value is used when Vref + 0.150V is referenced, and VIH.DQ(AC135) value is used when
Vref + 0.135V is referenced.
NOTE 8. VIL(ac) is used as a simplified symbol for VIL.DQ(AC175), VIL.DQ(AC150), and VIL.DQ(AC135);VIL.DQ(AC175) value is used when
Vref - 0.175V is referenced, VIL.DQ(AC150) value is used when Vref -0.150V is referenced, and VIL.DQ(AC135) value is used when
Vref - 0.135V 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
88
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