Intel AT80604005280AA User Manual
Electrical Specifications
46
Intel® Xeon® Processor 7500 Datasheet, Volume 1
Notes:
1.
Unless otherwise noted, all specifications in this table apply to all processor frequencies.
2.
Recommended strapping high is 1K - 10K Ω.
3.
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.
Therefore, proper simulation of the signals is the only means to verify proper timing
and signal quality.
through
list the AC specifications associated with the processor.
See
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, IMC and Sideband layout
guidelines are also available in the appropriate platform design guidelines.
signal integrity models provided by Intel. Intel® QPI, IMC 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 2-25. Miscellaneous DC Specifications
Pin
Parameter
Min
Typ
Max
Units
Notes
1
SKTID[2:0]
Input Low Voltage
<0.54
V
IOC
V
3
Input High Voltage
>0.7
V
CC
V
2
Leakage limit low
5
uA
3
Leakage limit high
4.2
mA
2
THERMALERT
Leakage limit low
2.6
mA
3
Leakage limit high
5
uA
Table 2-26. System Reference Clock AC Specifications (Sheet 1 of 2)
Symbol
Parameter
Min
Nom
Max
Unit
Figure
Notes
f
REFCLK
(SSC-off)
System Reference Clock
frequency
133.29
133.33
133.37
MHz
f
REFCLK
(SSC-on)
System Reference Clock
frequency
132.62
133.33
133.37
MHz
T
Rise,
T
Fall
Rise time, fall time.
175
700
ps
1,
2
T
Refclk-Dutycycle
Duty cycle of reference clock.
40
50
60
%
period
3
ER
Refclk-diff-Rise
,
ER
Refclk-diff-Fall
Differential Rising and falling
edge rates
1
4
V/ns
3,
4
C
I-
CK
Clock Input Capacitance
0.2
1.0
pF
VL
Differential Input Low Voltage
-0.15
V
3
VH
Differential Input High Voltage
0.15
V
3
V
cross
Absolute Crossing Point
0.25
0.35
0.55
V
1, 5,
6
V
cross
(rel)
Relative Crossing Point
0.25 +
0.5*(VH
avg
-
0.700)
0.55 +
0.5*(VH
avg
-
0.700)
5,
7
V
cross
Delta
V
cross
variation
-
-
0.14
V
1, 5, 8
V
max
(Absolute
Overshoot)
Single-ended maximum voltage
-
-
1.15
V
1,
9