Intel LF80550KF0604M Data Sheet

Dual-Core Intel® Xeon® Processor 7100 Series Datasheet

27

Due to the voltage levels supported by other components in the TAP logic, Intel 
recommends that the Dual-Core Intel® Xeon® Processor 7100 Series processor(s) be 
first in the TAP chain, followed by any other components within the system. Use of a 
translation buffer to connect to the rest of the chain is recommended unless one of the 
other components is capable of accepting an input of the appropriate voltage. Similar 
considerations must be made for TCK, TMS, TRST#, TDI, and TDO. Two copies of each 
signal may be required, each driving a different voltage level.

 specifies absolute maximum and minimum ratings. Within functional 

operation limits, functionality and long-term reliability can be expected.

At conditions outside functional operation condition limits, but within absolute 
maximum and minimum ratings, neither functionality nor long-term reliability can be 
expected. If a device is returned to conditions within functional operation limits after 
having been subjected to conditions outside these limits, but within the absolute 
maximum and minimum ratings, the device may be functional, but with its lifetime 
degraded depending on exposure to conditions exceeding the functional operation 
condition limits.

At conditions exceeding absolute maximum and minimum ratings, neither functionality 
nor long-term reliability can be expected. Moreover, if a device is subjected to these 
conditions for any length of time then, when returned to conditions within the 
functional operating condition limits, it will either not function, or its reliability will be 
severely degraded.

Although the processor contains protective circuitry to resist damage from static 
electric discharge, precautions should always be taken to avoid high static voltages or 
electric fields.

1.

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

be satisfied.

2.

Overshoot and undershoot voltage guidelines for input, output, and I/O signals are outlined in 

. 

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

3.

Storage temperature is applicable to storage conditions only. In this scenario, the processor must not 

receive a clock, and no pins can be connected to a voltage bias. Storage within these limits will not affect 

the long-term reliability of the device. For functional operation, please refer to the processor case 

temperature specifications.

4.

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

V

CC

Processor core supply voltage with 

respect to V

SS

-0.3

1.55

V

V

CACHE

Processor L3 cache voltage with 

respect to V

SS

-0.3

1.55

V

V

TT

Front side bus termination voltage 

with respect to V

SS

-0.3

1.55

V

T

CASE

Processor case temperature

See 

See 

°C

T

STORAGE

Processor storage temperature

-40

85

°C

3, 4