Specifications

E PENTIUM® PRO PROCESSOR AT 150, 166, 180, and 200 MHz
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3.13. DC Specifications
Table 9 through Table 7 list the DC specifications
associated with the Pentium Pro processor.
Specifications are valid only while meeting the
processor specifications for case temperature, clock
frequency and input voltages. Care should be taken
to read all notes associated with each parameter.
See Section 3.3. for an explanation of voltage plans
for Pentium Pro processors. See Section 8.4.1.1. for
OverDrive processor information and Section 3.16
for flexible motherboard recommendations.
The DC specifications for the V
CC
P, V
CC
S, and V
CC
5
supplies are listed in Table 4 and Table 5.
Most of the signals on the Pentium Pro processor are
in the GTL+ signal group. These signals are specified
to be terminated to 1.5V. The DC specifications for
these signals are listed in Table 6. Care should be
taken to read all notes associated with each
parameter.
To allow compatibility with other devices, some of the
signals are 3.3 V tolerant and can therefore be
terminated or driven to 3.3V. The DC specifications
for these 3.3 V tolerant inputs are listed in Table 7.
Care should be taken to read all notes associated
with each parameter.
Table 4. Voltage Specification
Symbol Parameter Min Typ Max Unit Notes
V
CC
P Primary V
CC
2.945
3.135
3.1
3.3
3.255
3.465
V
V
@150 MHz, 1
@ 166, 180 & 200 MHz
V
CC
S Secondary V
CC
3.135 3.3 3.465 V 3.3 ± 5%, 2
V
CC
5 5 V Supply 4.75 5.0 5.25 V 5.0 ± 5%, 3
NOTES:
1. This is a 5% tolerance. To comply with these guidelines and the industry standard voltage regulator module
specifications, the equivalent of forty (40) 1 µF±22% capacitors in 1206 packages should be placed near the power pins
of the processor. More specifically, at least 40 µF of capacitance should exist on the power plane with less than 250pH of
inductance and 4m of resistance between it and the pins of the processor assuming a regulator set point of ±1%.
2. This voltage is currently not required by the Pentium Pro processor. The voltage is defined for future use.
3. This voltage is required for OverDrive processor support.