User guide

DDR3 SODIMM

Product Datasheet

Rev. 1.5a Nov. 2012

Single-Ended AC and DC Input Levels for Command and Address

DDR3-1066 DDR3-1333 Note

Symbol Parameter

Min. Max. Min. Max.

Units

VIH.CA(DC) DC Input Logic High Vref + 0.100 VDD Vref + 0.100 VDD V 1

VIL.CA(DC) DC Input Logic Low VSS Vref - 0.100 VSS Vref - 0.100 V 1

VIH.CA(AC) AC Input Logic High Vref + 0.175 Note 2 Vref + 0.175 Note 2 V 1, 2

VIL.CA(AC) AC Input Logic Low Note 2 Vref - 0.175 Note 2 Vref - 0.175 V 1, 2

VIH.CA(AC150) AC Input Logic High - - Vref + 0.15 Note 2 V 1, 2

VIL.CA(AC150) AC Input Logic Low - - Note 2 Vref - 0.15 V 1, 2

VRefCA(DC)

Reference Voltage

for ADD, CMD Inputs

0.49 x VDD 0.51 x VDD 0.49 x VDD 0.51 x VDD V 3, 4

Note:

1. For input only pins except . Vref = VrefCA(DC).

2. See “Overshoot and Undershoot Specifications” in the device datasheet.

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.

Single-Ended AC and DC Input Levels for DQ and DM

DDR3-1066 DDR3-1333

Symbol Parameter

Min. Max. Min. Max.

Units Note

VIH.DQ(DC) DC Input Logic High Vref + 0.100 VDD Vref + 0.100 VDD V 1

VIL.DQ(DC) DC Input Logic Low VSS Vref - 0.100 VSS Vref - 0.100 V 1

VIH.DQ(AC) AC Input Logic High Vref + 0.175 Note 2 Vref + 0.15 Note 2 V 1, 2, 5

VIL.DQ(AC) AC Input Logic Low Note 2 Vref - 0.175 Note 2 Vref - 0.15 V 1, 2, 5

VRefDQ(DC)

Reference Voltage

for DQ, DM Inputs

0.49 x VDD 0.51 x VDD 0.49 x VDD 0.51 x VDD V 3, 4

Note: 1. For input only pins except. Vref = VrefDQ(DC).

2. See “Overshoot and Undershoot Specifications” in the device datasheet.

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.

5. Single-ended swing requirement for DQS, DQS# is 350 mV (peak to peak). Differential swing requirement for DQS -

DQS# is 700 mV(peak to peak).