HMT325S6CFR8C Datasheet, PDF (13/48 Pages) Hynix Semiconductor – DDR3 SDRAM Unbuffered SODIMMs Based on 2Gb C-die

AC & DC Input Measurement Levels
AC and DC Logic Input Levels for Single-Ended Signals
AC and DC Input Levels for Single-Ended Command and Address Signals
Single Ended AC and DC Input Levels for Command and ADDress
Symbol
Parameter
DDR3-800/1066/1333/1600
Min
Max
Unit Notes
VIH.CA(DC100) DC input logic high
Vref + 0.100
VDD
V
1, 5
VIL.CA(DC100) DC input logic low
VSS
Vref - 0.100
V
1, 6
VIH.CA(AC175) AC input logic high
VIL.CA(AC175) AC input logic low
Vref + 0.175
Note2
Note2
Vref - 0.175
V 1, 2, 7
V 1, 2, 8
VIH.CA(AC150) AC Input logic high
Vref + 0.150
Note2
V 1, 2, 7
VIL.CA(AC150) AC input logic low
Note2
Vref - 0.150
V 1, 2, 8
VIH.CA(AC135) AC input logic high
-
-
V 1, 2, 7
VIL.CA(AC135) AC input logic low
-
-
V 1, 2, 8
VIH.CA(AC125) AC Input logic high
-
-
V 1, 2, 7
VIL.CA(AC125) AC input logic low
-
-
V 1, 2, 8
V_RefCA(DC)
Reference Voltage for
ADD, CMD inputs
0.49 * VDD
0.51 * VDD
V
3, 4
Notes:
1. For input only pins except RESET, Vref = VrefCA (DC).
2. Refer to "Overshoot and Undershoot Specifications" on page 26.
3. The ac peak noise on V_Ref may not allow V_Ref to deviate from V_RefCA(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.CA(DC100)
6. VIL(dc) is used as a simplified symbol for VIL.CA(DC100)
7. VIH(ac) is used as simplified symbol for VIH.CA(AC175), VIH.CA(AC150), VIH.CA(AC135), and
VIH.CA(AC125); VIH.CA(AC175) value is used when Vref + 0.175V is referenced, VIH.CA(AC150) value is
used when Vref + 0.150V is referenced, VIH.CA(AC135) value is used when Vref + 0.135V is referenced,
and VIH.CA(AC125) value is used when Vref + 0.125V is referenced.
8. VIL(ac) is used as simplified symbol for VIL.CA(AC175), VIL.CA(AC150), VIL.CA(AC135), and
VIL.CA(AC125); VIL.CA(AC175) value is used when Vref - 0.175V is referenced, VIL.CA(AC150) value is
used when Vref - 0.150V is referenced, VIL.CA(AC135) value is used when Vref - 0.135V is referenced, and
VIL.CA(AC125) value is used when Vref - 0.125V is referenced.
Rev. 1.0/Sep. 2012
13