HMT451V7MFR8C Datasheet, PDF (25/67 Pages) Hynix Semiconductor – DDR3 SDRAM VLP 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 51 in “ DDR3 Device
Operation”) as well as derating tables in Table 46 of “DDR3 Device Operation” depending on Vih/Vil AC lev-
els.
Single Ended AC and DC Input Levels for DQ and DM
Symbol
Parameter
DDR3-800/1066
Min
Max
DDR3-1333/1600
Min
Max
Unit Notes
VIH.DQ(DC100) DC input logic high
VIL.DQ(DC100) DC input logic low
VIH.DQ(AC175) AC input logic high
VIL.DQ(AC175) AC input logic low
VIH.DQ(AC150) AC Input logic high
Vref + 0.100
VSS
Vref + 0.175
Note2
Vref + 0.150
VDD
Vref - 0.100
Note2
Vref - 0.175
Note2
Vref + 0.100
VSS
-
-
Vref + 0.150
VDD
Vref - 0.100
-
-
Note2
V 1, 5
V 1, 6
V 1, 2, 7
V 1, 2, 8
V 1, 2, 7
VIL.DQ(AC150) AC input logic low
Note2
Vref - 0.150
Note2
Vref - 0.150 V 1, 2, 8
VIH.CA(AC135) AC input logic high
-
-
-
-
mV 1, 2, 7
VIL.CA(AC135) AC input logic low
-
-
-
-
mV 1, 2, 8
V_RefDQ(DC)
Reference Voltage
for DQ, DM inputs
0.49 * VDD
0.51 * VDD
0.49 * VDD
0.51 * VDD
V 3, 4
Notes:
1. Vref = VrefDQ (DC).
2. Refer to "Overshoot and Undershoot Specifications" on page 37.
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. +/- 15 mV).
4. For reference: approx. VDD/2 +/- 15 mV.
5. VIH(dc) is used as a simplified symbol for VIH.DQ(DC100)
6. VIL(dc) is used as a simplified symbol for VIL.DQ(DC100)
7. VIH(ac) is used as simplified symbol for VIH.DQ(AC175), VIH.DQ(AC150), and VIH.DQ(AC135);
VIH.DQ(AC175) value is used when Vref + 0.175V is referenced, VIH.DQ(AC150) value is used when Vref
+ 0.150V is referenced, and VIH.DQ(AC135) value is used when Vref + 0.135V is referenced.
8. VIL(ac) is 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. 2012
25