Intel 4 620 JM80547PG0722MM Data Sheet

24

The processor DC specifications in this section are defined at the processor core silicon and 
not at the package lands unless noted otherwise. See 

 for the signal definitions and 

signal assignments. Most of the signals on the processor FSB are in the GTL+ signal group. The 
DC specifications for these signals are listed in 

.

Previously, legacy signals and Test Access Port (TAP) signals to the processor used low-voltage 
CMOS buffer types. However, these interfaces now follow DC specifications similar to GTL+. The 
DC specifications for these signal groups are listed in 

.

 through 

 list the DC specifications for the Pentium 4 processor and are valid 

only while meeting specifications for case temperature, clock frequency, and input voltages. Care 
should be taken to read all notes associated with each parameter.

MSR_PLATFORM_BRV bit 18 is a Platform Requirement Bit (PRB) that indicates whether the 
processor requires a 775_VR_CONFIG_04B (PRB = 1) or 775_VR_CONFIG_04A (PRB = 0) 
platform.

1.

For functional operation, all processor electrical, signal quality, mechanical and thermal specifications must be satisfied.

2.

Excessive overshoot or undershoot on any signal will likely result in permanent damage to the processor.

V

CC

Core voltage with respect to 
V

SS

 - 0.3

1.55

V

—

V

TT

FSB termination voltage with 
respect to V

SS

- 0.3

1.55

V

—

T

C

Processor case temperature

See 

°C

—

T

STORAGE

Processor storage temperature

 –40

 +85

°C

3, 4

3.

Storage temperature is applicable to storage conditions only. In this scenario, the processor must not receive a clock, and
no lands can be connected to a voltage bias. Storage within these limits will not affect the long-term reliability of the device.
For functional operation, refer to the processor case temperature specifications.

4.

This rating applies to the processor and does not include any tray or packaging.