Electrical Specifications
Table 2-25. Miscellaneous DC Specifications
Notes
1
Pin
Parameter
Min
Typ
Max
Units
SKTID[2:0]
Input Low Voltage
Input High Voltage
Leakage limit low
Leakage limit high
Leakage limit low
Leakage limit high
<0.54 VIOC
V
3
>0.7 VCC
V
2
3
2
3
5
uA
mA
mA
uA
4.2
2.6
5
THERMALERT
Notes:
1.
2.
3.
Unless otherwise noted, all specifications in this table apply to all processor frequencies.
Recommended strapping high is 1K - 10K Ω.
Recommended strapping low is <100 Ω.
2.8
AC Specifications
The processor timings specified in this section are defined at the processor pads.
Therefore, proper simulation of the signals is the only means to verify proper timing
and signal quality.
Table 2-26 through Table 2-28 list the AC specifications associated with the processor.
See Chapter 5 for signal definitions.
The timings specified in this section should be used in conjunction with the processor
signal integrity models provided by Intel. Intel QPI, SMI and sideband layout guidelines
are also available in the appropriate platform design guidelines.
Note:
Care should be taken to read all notes associated with a particular timing parameter.
Table 2-26. System Reference Clock AC Specifications (Sheet 1 of 2)
Symbol
(SSC-off)
Parameter
Min
Nom
Max
Unit
Figure
Notes
System Reference Clock
frequency
f
133.29
133.33
133.37
MHz
REFCLK
System Reference Clock
frequency
f
(SSC-on)
132.62
175
133.33
133.37
700
MHz
ps
REFCLK
T
T
Rise time, fall time.
1, 2
Rise, Fall
%
period
3
T
Duty cycle of reference clock.
40
50
60
Refclk-Dutycycle
ER
,
Differential Rising and falling
edge rates
3, 4
Refclk-diff-Rise
1
4
V/ns
ER
Refclk-diff-Fall
C CK
I-
Clock Input Capacitance
Differential Input Low Voltage
Differential Input High Voltage
Absolute Crossing Point
0.2
1.0
pF
V
VL
-0.15
3
VH
0.15
0.25
V
3
V
0.35
0.55
V
1, 5, 6
5, 7
cross
0.25 +
0.55 +
V
(rel)
Relative Crossing Point
0.5*(VH
-
0.5*(VH
-
avg
cross
avg
0.700)
-
0.700)
0.14
V
Delta
V
variation
cross
-
-
V
V
1, 5, 8
1, 9
cross
V
(Absolute
max
Overshoot)
Single-ended maximum voltage
-
1.15
Datasheet Volume 1 of 2
43
INTEL [ INTEL ]
