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Low Voltage Intel

Xeon

™

Processor at 1.60 GHz, 2.0 GHz and 2.4 GHz

Datasheet 21

2.9 Asynchronous GTL+ Signals

The Low Voltage Intel

Xeon

™

processor does not utilize CMOS voltage levels on any signals that

connect to the processor silicon. As a result, legacy input signals such as A20M#, IGNNE#, INIT#,

LINT0/INTR, LINT1/NMI, SMI#, SLP#, and STPCLK# utilize GTL+ input buffers. Legacy

output FERR#/PBE# and other non-AGTL+ signals IERR#, and THERMTRIP# utilize GTL+

output buffers. PROCHOT# uses GTL+ input/output buffer. All of these asynchronous GTL+

signals follow the same DC requirements as AGTL+ signals, however the outputs are not driven

high (during the logical 0-to-1 transition) by the processor (the major difference between GTL+

and AGTL+). Asynchronous GTL+ signals do not have setup or hold time specifications in relation

to BCLK[1:0]. However, all of the asynchronous GTL+ signals are required to be asserted for at

least two BCLKs in order for the processor to recognize them. See Table 11 and Table 16 for the

DC and AC specifications for the asynchronous GTL+ signal groups.

2.10 Maximum Ratings

Table 6 lists the processor’s maximum environmental stress ratings. Functional operation at the

absolute maximum and minimum is neither implied nor ensured. The processor should not receive

a clock while subjected to these conditions. Functional operating parameters are listed in the AC

and DC tables. Extended exposure to the maximum ratings may affect device reliability.

Furthermore, although the processor contains protective circuitry to resist damage from static

electric discharge, one should always take precautions to avoid high static voltages or electric

fields.

Table 6. Processor Absolute Maximum Ratings

Symbol Parameter Min Max Unit Notes

STORAGE

Processor storage temperature -40 85 °C 2

Any processor supply voltage with

respect to V

-0.3 1.75 V 1

inAGTL+

AGTL+ buffer DC input voltage with

respect to V

-0.1 1.75 V

inGTL+

Async GTL+ buffer DC input voltage

with respect to Vss

-0.1 1.75 V

VID

Max VID pin current 5 mA

NOTES:

1. This rating applies to any pin of the processor.

2. Contact Intel for storage requirements in excess of one year.

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