Hynix HMT351R7BFR4C-PBT8 Datasheet Page 30

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Rev. 1.5 / Mar. 2012 30
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
Notes:
1. For input only pins except RESET
, Vref = VrefCA (DC).
2. Refer to "Overshoot and Undershoot Specifications" on page 43.
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. +/- 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)
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.
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.
9. Vref is measured relative to VDD at the same point, time and same device.
Single Ended AC and DC Input Levels for Command and ADDress
Symbol Parameter
DDR3-800/1066/1333/1600
Unit Notes
Min Max
VIH.CA(DC100) DC input logic high Vref + 0.100 VDD V 1, 5
VIL.CA(DC100) DC input logic low 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 - - V 1, 2, 7
VIL.CA(AC135) AC input logic low - - V 1, 2, 8
VIH.CA(AC125) AC Input logic high - - V 1, 2, 7
VIL.CA(AC125) AC input logic low - - V 1, 2, 8
V
RefCA(DC
)
Reference Voltage for
ADD, CMD inputs
0.49 * VDD 0.51 * VDD V 3, 4, 9
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