AS4C256M16D3
Table 12. Single-Ended AC and DC Input Levels for Command and Address
-12 BCN/BIN
Symbol
Parameter
Unit Note
Min.
Max.
VDD
VIH.CA(DC100)
VIL.CA(DC100)
VIH.CA(AC175)
VIL.CA(AC175)
VIH.CA(AC150)
VIL.CA(AC150)
VRefCA(DC)
DC input logic high
VREF+0.1
V
V
V
V
V
V
V
1,5
1,6
1,2
1,2
1,2
1,2
3,4
DC input logic low
VSS
VREF-0.1
-
AC input logic high
VREF+0.175
AC input logic low
-
VREF-0.175
-
AC input logic high
VREF+0.15
-
AC input logic low
VREF-0.15
0.51xVDD
Reference Voltage for ADD, CMD inputs
0.49xVDD
NOTE 1: For input only pins except RESET#. 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.
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) and VIH.CA(AC175) value is used
when Vref + 0.175V is referenced, VIH.CA(AC150) value is used when Vref + 0.150V is referenced.
NOTE 8: VIL(ac) is used as a simplified symbol for VIL.CA(AC175), VIL.CA(AC150) and VIL.CA(AC175) value is used
when Vref - 0.175V is referenced, VIL.CA(AC150) value is used when Vref - 0.150V is referenced.
Table 13. Single-Ended AC and DC Input Levels for DQ and DM
-12 BCN/BIN
Symbol
Parameter
Unit Note
Min.
VREF+0.1
VSS
Max.
VDD
VIH.DQ(DC100)
VIL.DQ(DC100)
DC input logic high
DC input logic low
V
V
V
V
V
1,5
1,6
1,2
1,2
3,4
VREF-0.1
-
VIH.DQ(AC150) AC input logic high
VIL.DQ(AC150) AC input logic low
VREF+0.15
-
VREF-0.15
0.51xVDD
VRefDQ(DC)
Reference Voltage for DQ, DM inputs
0.49xVDD
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.
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(AC175) value is used
when Vref + 0.175V is referenced, VIH.DQ(AC150) value is used when Vref + 0.150V is referenced.
NOTE 8: VIL(ac) is used as a simplified symbol for VIL.DQ(AC175), VIL.DQ(AC150) and VIL.DQ(AC175) value is used
when Vref - 0.175V is referenced, VIL.DQ(AC150) value is used when Vref - 0.150V is referenced.
Confidential
22
Rev. 3.0
Aug. /2014
ALSC [ ALLIANCE SEMICONDUCTOR CORPORATION ]
