Electrical Characteristics
11.3.2
General DC Characteristics
Platform Reference Voltages at the top of Table 11-5 are specified at DC only. VREF
measurements should be made with respect to the supply voltage.
Table 11-5. DC Characteristics
Symbol
Parameter
Min
Nom
Max
Unit Notes
Reference Voltages
FSB_DVREF
FSB_ACCVREF Common Clock Signal
Reference Voltages
Host Data, Address, and
0.666 x
VTT_FSB
–2%
0.666 x
VTT_FSB
0.666 x
VTT_FSB
+2%
V
V
FSB_SWING
Host Compensation Reference
Voltage
0.25 x VTT_FSB
–2%
0.25 x
VTT_FSB
0.25 x
VTT_FSB
+2%
CL_VREF
SMVREF
Controller Link Reference
Voltage
0.270 x VCC_CL
0.279 x
VCC_CL
0.287 x
VCC_CL
V
V
DDR2 Reference Voltage
0.49 x
0.50 x
0.51 x
VCC_DDR
VCC_DDR
VCC_DDR
Host Interface
VIL_H
Host GTL+ Input Low Voltage
Host GTL+ Input High Voltage
Host GTL+ Output Low Voltage
-0.10
0
VTT_FSB
—
(0.666 x
VTT_FSB) – 0.1
V
V
V
VIH_H
(0.666 x
VTT_FSB) + 0.1
VTT_FSB + 0.1
VOL_H
—
(0.25 x
VTT_FSB) +
0.1
VOH_H
IOL_H
Host GTL+ Output High Voltage VTT_FSB – 0.1
—
—
VTT_FSB
V
Host GTL+ Output Low Current
—
VTT_FSBmax * mA Rttmin =
(1–0.25) /
Rttmin
47.5 Ω
ILEAK_H
Host GTL+ Input Leakage
Current
—
—
45
μA
VOL<
Vpad<
Vtt_FSB
CPAD
Host GTL+ Input Capacitance
2.0
—
—
2.5
2.5
pF
pF
CPCKG
Host GTL+ Input Capacitance
(common clock)
0.90
DDR2 System Memory Interface
VIL(DC)
DDR2 Input Low Voltage
DDR2 Input High Voltage
—
—
—
SMVREF–
0.125
V
V
VIH(DC)
SMVREF +
0.125
—
VIL(AC)
VIH(AC)
DDR2 Input Low Voltage
DDR2 Input High Voltage
—
—
—
SMVREF– 0.25
—
V
V
SMVREF + 0.25
Datasheet
317
INTEL [ INTEL ]
