DDR3(L) 4Gb SDRAM
NT5CB(C)512M8DN / NT5CB(C)256M16DP
DDR3 AC and DC Logic Input Levels for DQ and DM
DDR3
1333,1600
Symbol
Parameter
800,1066
1866,2133
Unit Notes
Min
Max
Min
Max
Min
Max
VIH.DQ(DC100) DC input logic high
VIL.DQ(DC100) DC input logic low
Vref + 0.1
VSS
VDD
Vref + 0.1
VSS
VDD
Vref + 0.1
VDD
V
V
V
V
V
V
V
V
1, 5
Vref - 0.1
Note 2
Vref - 0.1
-
VSS
Vref - 0.1
1, 6
VIH.DQ(AC175) AC input logic high Vref + 0.175
VIL.DQ(AC175) AC input logic low Note 2
VIH.DQ(AC150) AC input logic high Vref + 0.150
VIL.DQ(AC150) AC input logic low Note 2
VIH.DQ(AC135) AC input logic high Vref + 0.135
-
-
-
1, 2, 7
1, 2, 8
1, 2, 7
1, 2, 8
1, 2, 7
1, 2, 8
Vref - 0.175
Note 2
-
-
-
-
Vref + 0.150
Note 2
Vref + 0.135
Note 2
Note 2
Vref - 0.150
Note 2
Vref - 0.135
-
-
-
-
Vref - 0.150
Note 2
Vref + 0.135
Note 2
Note 2
Vref - 0.135
VIL.DQ(AC135)
VRefDQ(DC)
AC input logic low
Note 2
Vref - 0.135
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, 9
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 2.3
02/2017
94
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