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Intel® Xeon® Processor 7400 Series Datasheet 33

Electrical Specifications

2.11.2 V

Overshoot Specification

Processors can tolerate short transient overshoot events where V

exceeds the VID

voltage when transitioning from a high-to-low current load condition. This overshoot

cannot exceed VID + V

OS_MAX

is the maximum allowable overshoot above

VID). These specifications apply to the processor die voltage as measured across the

VCC_SENSE and VSS_SENSE pins and across the VCC_SENSE2 and VSS_SENSE2 pins.

Notes:

1. VOS is the measured overshoot voltage.

2. TOS is the measured time duration above VID.

2.11.3 Die Voltage Validation

Core voltage (VCC) overshoot events at the processor must meet the specifications in

Table 2-15 when measured across the VCC_SENSE and VSS_SENSE pins and across

the VCC_SENSE2 and VSS_SENSE2 pins. Overshoot events that are < 10 ns in duration

may be ignored. These measurements of processor die level overshoot should be taken

with a 100 MHz bandwidth limited oscilloscope.

Table 2-15. V

Overshoot Specifications

Symbol Parameter Min Max Units Figure Notes

OS_MAX

Magnitude of V

overshoot above VID 50 mV 2-5

OS_MAX

Time duration of V

overshoot above VID 25 µs 2-5

Figure 2-5. V

Overshoot Example Waveform

Example Overshoot Waveform

0 5 10 15 20 25

Time [us]

Voltage [V]

VID - 0.000

VID + 0.050

: Overshoot time above VID

: Overshoot above VID

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 135 136

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Lenovo AD80582QH056003 Datenblatt Seite 33