HMT325S6CFR8A Datasheet, PDF (15/50 Pages) Hynix Semiconductor – DDR3L SDRAM Unbuffered SODIMMs Based on 2Gb C-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 41 and Table 47 in “ DDR3L Device
Operation”) as well as derating tables in Table 44 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 Vref + 0.09
VDD
Vref + 0.09
VDD
V1
VIL.DQ(DC90) DC input logic low
VSS
Vref - 0.09
VSS
Vref - 0.09
V
1
VIH.DQ(AC160) AC input logic high Vref + 0.160
Note2
-
-
V 1, 2, 5
VIL.DQ(AC160) AC input logic low
Note2
Vref - 0.160
-
-
V 1, 2, 5
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
-
-
-
-
V 1, 2, 5
VIL.DQ(AC130) AC input logic low
-
-
-
-
V 1, 2, 5
V_RefDQ(DC)
Reference Voltage
for DQ, DM inputs
0.49 * VDD
0.51 * VDD
0.49 * VDD
0.51 * VDD
V 3, 4, 9
Notes:
1. Vref = VrefDQ (DC).
2. Refer to "Overshoot and Undershoot Specifications" on page 27.
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. 0.3 /Jun. 2012
15