HMT451R7AFR8A Datasheet, PDF(29/72 Page) Hynix Semiconductor – DDR3L SDRAM Registered DIMM Based on 4Gb A-die

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HMT451R7AFR8A Datasheet, PDF (29/72 Pages) Hynix Semiconductor – DDR3L SDRAM Registered DIMM Based on 4Gb A-die

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AC and DC Input Levels for Single-Ended Signals

DDR3 SDRAM will support two Vih/Vil AC levels for DDR3-800 and DDR3-1066s specified in table below.

DDR3 SDRAM will also support corresponding tDS values (Table 43 on page 117 and Table 50 on page 142

in âDDR3L Device Operationâ) as well as derating tables Table 46 on page 135 in âDDR3L Device Opera-

tionâ depending on Vih/Vil AC levels.

Single Ended AC and DC Input Levels for DQ and DM

Symbol

Parameter

DDR3L-800/1066

Min

Max

DDR3L-1333/1600

Min

Max

DDR3L-1866

Min

Max

Unit Notes

VIH.DQ(DC90) DC input logic high Vref + 0.09 VDD Vref + 0.09 VDD Vref + 0.09 VDD

VIL.DQ(DC90) DC input logic low VSS Vref - 0.09 VSS Vref - 0.09 VSS Vref - 0.09

VIH.DQ(AC160) AC input logic high Vref + 0.160 Note2

VIL.DQ(AC160) AC input logic low Note2 Vref - 0.160

VIH.DQ(AC135) AC Input logic high Vref + 0.135 Note2 Vref + 0.135 Note2

V 1, 2, 5

VIL.DQ(AC135) AC input logic low Note2 Vref - 0.135 Note2 Vref - 0.135

V 1, 2, 5

VIH.DQ(AC130) AC Input logic high

Vref + 0.130 Note2 V 1, 2, 5

VIL.DQ(AC130) AC input logic low

Note2 Vref - 0.130 V 1, 2, 5

VRefDQ(DC)

Reference Voltage

for DQ, DM inputs

0.49 * VDD

0.51 * VDD

0.49 * VDD

0.51 * VDD

0.49 * VDD

0.51 * VDD

3, 4

Notes:

1. Vref = VrefDQ (DC).

2. Refer to "Overshoot and Undershoot Specifications" on page 41.

3. The ac peak noise on VRef may not allow VRef to deviate from VRefDQ(DC) by more than +/-1% VDD (for

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

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

5. These levels apply for 1.35 volt (table "Single Ended AC and DC Input Levels for Command and

Address" on page 28) operation only. If the device is operated at 1.5V (table above), the respective levels

in JESD79-3 (VIH/L.DQ(DC100), VIH/L.DQ(AC175), VIH/L.DQ(AC150), VIH/L.DQ(AC135) etc.) apply. The

1.5V levels (VIH/L.DQ(DC100), VIH/L.DQ(AC175), VIH/L.DQ(AC150), VIH/L.DQ(AC135) etc.) do not apply

when the device is operated in the 1.35 voltage range.

Rev. 0.1 / Jul. 2012

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