HMT41GU6MFR8A Datasheet, PDF (18/57 Pages) Hynix Semiconductor – DDR3L SDRAM Unbuffered DIMMs 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
DDR3-1866
Min
Max
Unit Notes
VIH.DQ(DC100) DC input logic high Vref + 0.100 VDD Vref + 0.100 VDD Vref + 0.100 VDD
V 1, 5
VIL.DQ(DC100) DC input logic low VSS Vref - 0.100 VSS Vref - 0.100 VSS Vref - 0.100 V 1, 6
VIH.DQ(AC175) AC input logic high Vref + 0.175 Note2
-
-
-
-
V 1, 2, 7
VIL.DQ(AC175) AC input logic low Note2 Vref - 0.175
-
-
-
-
V 1, 2, 8
VIH.DQ(AC150) AC Input logic high Vref + 0.150 Note2 Vref + 0.150 Note2 Vref + 0.150 Note2
V 1, 2, 7
VIL.DQ(AC150) AC input logic low Note2 Vref - 0.150 Note2 Vref - 0.150 Note2 Vref - 0.150 V 1, 2, 8
VIH.CA(AC135) AC input logic high
-
-
-
-
Vref + 0.135 Note2 mV 1, 2, 7
VIL.CA(AC135) AC input logic low
-
-
-
-
Note2 Vref - 0.135 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
0.49 * VDD
0.51 * VDD
V
3, 4
Notes:
1. Vref = VrefDQ (DC).
2. Refer to "Overshoot and Undershoot Specifications" on page 30.
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. 1.2 / Jul. 2013
18