W632GG8KB Datasheet, PDF (101/159 Pages) Winbond – 32M X 8 BANKS X 8 BIT DDR3 SDRAM

W632GG8KB
10.6.2 DC and AC Input Levels for Single-Ended Data Signals
Table 19 – Single-Ended DC and AC Input Levels for DQ and DM
PARAMETER
SYMBOL
DDR3-1333, DDR3-1600
MIN.
MAX.
DDR3-1866
MIN.
MAX.
UNIT NOTES
DC input logic high VIH.DQ(DC100) VREF + 0.100
VDD
VREF + 0.100
VDD
V
1, 5
DC input logic low VIL.DQ(DC100)
VSS
VREF - 0.100
VSS
VREF - 0.100
V
1, 6
AC input logic high VIH.DQ(AC150) VREF + 0.150
Note 2
-
-
V
1, 2, 7
AC input logic low VIL.DQ(AC150)
Note 2
VREF - 0.150
-
-
V
1, 2, 8
AC input logic high VIH.DQ(AC135) VREF + 0.135
Note 2
VREF + 0.135
Note 2
V
1, 2, 7
AC input logic low VIL.DQ(AC135)
Note 2
VREF - 0.135
Note 2
VREF - 0.135
V
1, 2, 8
Reference Voltage
for DQ, DM inputs
VREFDQ(DC)
0.49 x VDD
0.51 x VDD
0.49 x VDD
0.51 x VDD
V
3, 4
Notes:
1. VREF = VREFDQ(DC).
2. See section 10.12 “Overshoot and Undershoot Specifications” on page 121.
3. The AC peak noise on VREF may not allow VREF to deviate from VREFDQ(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 a simplified symbol for VIH.DQ(AC150), and VIH.DQ(AC135); 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 a simplified symbol for VIL.DQ(AC150), and VIL.DQ(AC135); 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.
- 101 -
Publication Release Date: Dec. 08, 2014
Revision: A04