HMT451R7MFR8A Datasheet, PDF (29/71 Pages) Hynix Semiconductor – DDR3L SDRAM Registered DIMM Based on 4Gb M-die

AC and DC Input Levels for Single-Ended Signals
DDR3 SDRAM will support two Vih/Vil AC levels for DDR3-800 and DDR3-1066 as specified in the table
below. DDR3 SDRAM will also support corresponding tDS values (Table 43 and Table 50 in “ DDR3L Device
Operation”) as well as derating tables in Table 46 of “DDR3L Device Operation” 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
Unit Notes
VIH.DQ(DC90) DC input logic high
VIL.DQ(DC90) DC input logic low
VIH.DQ(AC160) AC input logic high
VIL.DQ(AC160) AC input logic low
VIH.DQ(AC135) AC Input logic high
VIL.DQ(AC135) AC input logic low
VIH.DQ(AC130) AC Input logic high
VIL.DQ(AC130) AC input logic low
V_RefDQ(DC)
Reference Voltage
for DQ, DM inputs
Vref + 0.09
VSS
Vref + 0.160
Note2
Vref + 0.135
Note2
-
-
0.49 * VDD
VDD
Vref - 0.09
Note2
Vref - 0.160
Note2
Vref - 0.135
-
-
0.51 * VDD
Vref + 0.09
VSS
-
-
Vref + 0.135
Note2
-
-
0.49 * VDD
VDD
Vref - 0.09
-
-
Note2
Vref - 0.135
-
-
0.51 * VDD
V1
V1
V 1, 2, 5
V 1, 2, 5
V 1, 2, 5
V 1, 2, 5
V 1, 2, 5
V 1, 2, 5
V 3, 4
Notes:
1. Vref = VrefDQ (DC).
2. Refer to "Overshoot and Undershoot Specifications" on page 41.
3. The ac peak noise on V_Ref may not allow V_Ref to deviate from V_RefDQ(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. used as simplified symbol for VIL.DQ(AC175), VIL.DQ(AC150), and
VIL.DQ(AC135); VIL.DQ(AC175) value is used when Vref - 0.175V is referenced, VIL.DQ(AC150) value is used
when Vref - 0.150V is referenced, and VIL.DQ(AC135) value is used when Vref - 0.135V is referenced.
Rev. 1.0 / Aug. 2013
29