Hynix HMT42GR7BFR4C-RDT8 User Manual
Rev. 1.0 / May. 2014
27
AC & DC Input Measurement Levels
AC and DC Logic Input Levels for Single-Ended Signals
AC and DC Input Levels for Single-Ended Command and Address Signals
AC and DC Input Levels for Single-Ended Command and Address Signals
Notes:
1. For input only pins except RESET, Vref = VrefCA (DC).
2. Refer to "Overshoot and Undershoot Specifications" on page 40.
3. The ac peak noise on V
2. Refer to "Overshoot and Undershoot Specifications" on page 40.
3. The ac peak noise on V
Ref
may not allow V
Ref
to deviate from V
RefCA(DC)
by more than +/-1% VDD (for refer-
ence: approx. +/- 15 mV).
4. For reference: approx. VDD/2 +/- 15 mV.
5. VIH(dc) is used as a simplified symbol for VIH.CA(DC100)
6. VIL(dc) is used as a simplified symbol for VIL.CA(DC100)
5. VIH(dc) is used as a simplified symbol for VIH.CA(DC100)
6. VIL(dc) is used as a simplified symbol for VIL.CA(DC100)
7. VIH(ac) is used as 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.
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.
8. VIL(ac) is used as 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.
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.
Single Ended AC and DC Input Levels for Command and ADDress
Symbol
Parameter
DDR3-800/1066/1333/1600
DDR3-1866
Unit
Notes
Min
Max
Min
Max
VIH.CA(DC100)
DC input logic high
Vref + 0.100
VDD
Vref + 0.100
VDD
V
1, 5
VIL.CA(DC100)
DC input logic low
VSS
Vref - 0.100
VSS
Vref - 0.100
V
1, 6
VIH.CA(AC175)
AC input logic high
Vref + 0.175
Note2
-
-
V
1, 2, 7
VIL.CA(AC175)
AC input logic low
Note2
Vref - 0.175
-
-
V
1, 2, 8
VIH.CA(AC150)
AC Input logic high
Vref + 0.150
Note2
-
-
V
1, 2, 7
VIL.CA(AC150)
AC input logic low
Note2
Vref - 0.150
-
-
V
1, 2, 8
VIH.CA(AC135)
AC input logic high
-
-
Vref + 0.135
Note2
V
1, 2, 7
VIL.CA(AC135)
AC input logic low
-
-
Note2
Vref - 0.135
V
1, 2, 8
VIH.CA(AC125)
AC Input logic high
-
-
Vref + 0.125
Note2
V
1, 2, 7
VIL.CA(AC125)
AC input logic low
-
-
Note2
Vref - 0.125
V
1, 2, 8
V
RefCA(DC
)
Reference Voltage for
ADD, CMD inputs
0.49 * VDD
0.51 * VDD
0.49 * VDD
0.51 * VDD
V
3, 4