Hynix HMT31GR7CFR4A-PBT8 Datasheet download pdf (Page 31)

Rev. 1.1 / May. 2013 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

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

Ref

may not allow V

Ref

to deviate from V

RefCA(DC)

by more than +/-1% VDD (for refer-

ence: approx. +/- 13.5 mV).

4. For reference: approx. VDD/2 +/- 13.5 mV

5. These 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), VIH/L.CA(AC135), VIH/L.CA(AC125) etc.) apply. The 1.5V levels (VIH/

L.CA(DC100), VIH/L.CA(AC175), VIH/L.CA(AC150), VIH/L.CA(AC135), VIH/L.CA(AC125) 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 DDR3L-1333/1600

Unit Notes

Min Max Min Max

VIH.CA(DC90) DC input logic high Vref + 0.09 VDD Vref + 0.09 VDD V 1

VIL.CA(DC90) DC input logic low VSS Vref - 0.09 VSS Vref - 0.09 V 1

VIH.CA(AC160) AC input logic high Vref + 0.160 Note2 Vref + 0.160 Note2 V 1,2,5

VIL.CA(AC160) AC input logic low Note2 Vref - 0.160 Note2 Vref - 0.160 V 1,2,5

VIH.CA(AC135) AC Input logic high Vref + 0.135 Note2 Vref + 0.135 Note2 V 1,2,5

VIL.CA(AC135) AC input logic low Note2 Vref - 0.135 Note2 Vref - 0.135 V 1,2,5

VIH.CA(AC125)AC Input logic high----V1,2,5

VIL.CA(AC125)AC input logic low----V1,2,5

RefCA(DC

)

Reference Voltage for

ADD, CMD inputs

0.49 * VDD 0.51 * VDD 0.49 * VDD 0.51 * VDD V 3,4

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 75 76

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Hynix HMT31GR7CFR4A-PBT8 Datasheet Page 31