Intel QX9775 EU80574XL088N Data Sheet
Product codes
EU80574XL088N
Datasheet
33
Electrical Specifications
NOTES:
1.
1.
Unless otherwise noted, all specifications in this table apply to all processor frequencies.
2.
Crossing Voltage is defined as the instantaneous voltage value when the rising edge of
BCLK0 is equal to the falling edge of BCLK1.
BCLK0 is equal to the falling edge of BCLK1.
3.
V
Havg
is the statistical average of the V
H
measured by the oscilloscope.
4.
Overshoot is defined as the absolute value of the maximum voltage.
5.
Undershoot is defined as the absolute value of the minimum voltage.
6.
Ringback Margin is defined as the absolute voltage difference between the maximum
Rising Edge Ringback and the maximum Falling Edge Ringback.
Rising Edge Ringback and the maximum Falling Edge Ringback.
7.
Threshold Region is defined as a region entered around the crossing point voltage in which
the differential receiver switches. It includes input threshold hysteresis.
the differential receiver switches. It includes input threshold hysteresis.
8.
The crossing point must meet the absolute and relative crossing point specifications
simultaneously.
simultaneously.
9.
V
Havg
can be measured directly using “Vtop” on Agilent and “High” on Tektronix
oscilloscopes.
10.
For V
IN
between 0 V and V
H
.
11.
ΔV
CROSS
is defined as the total variation of all crossing voltages as defined in note 3.
12.
Measured from -200 mV to +200 mV on the differential waveform (derived from REFCLK+
minus REFCLK-). The signal must be monotonic through the measurement region for rise
and fall time. The 400 mV measurement window is centered on the differential zero
crossing. See
minus REFCLK-). The signal must be monotonic through the measurement region for rise
and fall time. The 400 mV measurement window is centered on the differential zero
crossing. See
Table 2-19. FSB Differential BCLK Specifications
Symbol
Parameter
Min
Typ
Max
Unit
Figure
Notes
1
V
L
Input Low Voltage
-0.150
0.0
0.150
V
V
H
Input High Voltage
0.660
0.710
0.850
V
V
CROSS(abs)
Absolute Crossing
Point
Point
0.250
0.350
0.550
V
2,9
V
CROSS(rel)
Relative Crossing
Point
Point
0.250 + 0.5 *
(V
Havg
– 0.700)
N/A
0.550 + 0.5 *
(V
Havg
– 0.700)
V
3,8,9,11
Δ
VCROSS
Range of Crossing
Points
Points
N/A
N/A
0.140
V
V
OS
Overshoot
N/A
N/A
1.150
V
4
V
US
Undershoot
-0.300
N/A
N/A
V
5
V
RBM
Ringback Margin
0.200
N/A
N/A
V
6
V
TR
Threshold Region
V
CROSS
- 0.100
N/A
V
CROSS
+ 0.100
V
7
I
LI
Input Leakage
Current
Current
N/A
N/A
± 100
μA
10
ERRefclk-diffRrise
ERRefclk-diff-Fall
ERRefclk-diff-Fall
Differential Rising
and falling edge
rates
and falling edge
rates
0.6
4
V/ns
12