Hynix HMT351R7BFR8A-H9T8 User Manual
Rev. 1.2 / Dec. 2011
31
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 44.
3. The ac peak noise on V
1. For input only pins except RESET, Vref = VrefCA (DC).
2. Refer to "Overshoot and Undershoot Specifications" on page 44.
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
reference: approx. +/- 13.5 mV).
4. For reference: approx. VDD/2 +/- 13.5 mV
5. There levels apply for 1.35 volt (see table above) operation only. If the device is operated at 1.5V (table
4. For reference: approx. VDD/2 +/- 13.5 mV
5. There levels apply for 1.35 volt (see table above) operation only. If the device is operated at 1.5V (table
"Single Ended AC and DC Input Levels for DQ and DM" on page 32), the respective levels in JESD79-3
(VIH/L.CA(DC100), VIH/L.CA(AC175), VIH/L.CA(AC150), etc.) apply. The 1.5V levels (VIH/L.CA(DC100),
VIH/L.CA(AC175), VIH/L.CA(AC150), etc.) do not apply when the device is operated in the 1.35 voltage
range.
Single Ended AC and DC Input Levels for Command and Address
Symbol
Parameter
DDR3L-800/1066/1333
Unit
Notes
Min
Max
VIH.CA(DC90)
DC input logic high
Vref + 0.09
VDD
V
1
VIL.CA(DC90)
DC input logic low
VSS
Vref - 0.09
V
1
VIH.CA(AC160)
AC input logic high
Vref + 0.160
Note2
V
1, 2
VIL.CA(AC160)
AC input logic low
Note2
Vref - 0.160
V
1, 2
VIH.CA(AC135)
AC Input logic high
Vref + 0.135
Note2
V
1, 2
VIL.CA(AC135)
AC input logic low
Note2
Vref - 0.135
V
1, 2
V
RefCA(DC
)
Reference Voltage for ADD, CMD inputs
0.49 * VDD
0.51 * VDD
V
3, 4