AMS73CAG01808RA
AC and DC Input Measurement Levels
Single-Ended AC and DC Input Levels for Command and Address
Symbol
Parameter
Min.
VREF + 0.100
VSS
Max.
VDD
Units
Notes
1
VIHCA (DC100)
VILCA (DC100)
VIHCA (AC175)
VILCA (AC175)
VIHCA (AC150)
VILCA (AC150)
VREFCA (DC)
DC input logic high
DC input logic low
AC input logic high
AC input logic low
AC input logic high
AC input logic low
V
V
V
V
V
V
V
VREF - 0.100
-
1
VREF + 0.175
-
1,2
1,2
1,2
1,2
3,4
VREF - 0.175
-
VREF + 0.150
-
VREF - 0.150
0.51 * VDD
Reference voltage for
ADD, CMD inputs
0.49 * VDD
NOTE :
1. For input only pins except /RESET : VREF = VREFCA (DC).
2. See Overshoot and Undershoot Specifications section.
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).
4. For reference : approx. VDD/2 ±15 mV.
Single-Ended AC and DC Input Levels for DQ and DM
Symbol
Parameter
Min.
VREF + 0.100
VSS
Max.
VDD
Units
Notes
1
VIHDQ (DC100)
VILDQ (DC100)
VIHDQ (AC175)
VILDQ (AC175)
VIHDQ (AC150)
VILDQ (AC150)
VREFDQ (DC)
DC input logic high
DC input logic low
AC input logic high
AC input logic low
AC input logic high
AC input logic low
V
V
V
V
V
V
V
VREF - 0.100
-
1
VREF + 0.175
-
1,2
1,2
1,2
1,2
3,4
VREF - 0.175
-
VREF + 0.150
-
VREF - 0.150
0.51 * VDD
Reference voltage for
DQ, DM inputs
0.49 * VDD
NOTE :
1. For DQ and DM : VREF = VREFDQ (DC).
2. See Overshoot and Undershoot Specifications section.
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).
4. For reference: approx. VDD/2 ±15 mV.
AMS73CAG01808RA Rev. 1.0 December 2010
14
AMS [ Advanced Monolithic Systems Ltd ]
