Electrical Specifications
2.6.3
V
Overshoot
CC
The processor can tolerate short transient overshoot events where VCC exceeds the VID
voltage when transitioning from a high to low current load condition. This overshoot
cannot exceed VID + VOS_MAX (VOS_MAX is the maximum allowable overshoot voltage).
The time duration of the overshoot event must not exceed TOS_MAX (TOS_MAX is the
maximum allowable time duration above VID). These specifications apply to the
processor die voltage as measured across the VCC_SENSE and VSS_SENSE lands.
Table 2-7.
VCC Overshoot Specifications
Symbol
Parameter
Min
Max
Unit
Figure
Notes
1
1
V
T
Magnitude of V overshoot above VID
CC
—
—
50
25
mV
2-3
2-3
OS_MAX
Time duration of V overshoot above VID
CC
μs
OS_MAX
Notes:
1. Adherence to these specifications is required to ensure reliable processor operation.
Figure 2-3. VCC Overshoot Example Waveform
Example Overshoot Waveform
VOS
VID + 0.050
VID - 0.000
TOS
0
5
10
15
20
25
Time [us]
TOS: Overshoot time above VID
OS: Overshoot above VID
V
Notes:
1.
2.
V
is measured overshoot voltage.
is measured time duration above VID.
OS
OS
T
2.6.4
Die Voltage Validation
Overshoot events on processor must meet the specifications in Table 2-7 when
measured across the VCC_SENSE and VSS_SENSE lands. Overshoot events that are
< 10 ns in duration may be ignored. These measurements of processor die level
overshoot must be taken with a bandwidth limited oscilloscope set to a greater than or
equal to 100 MHz bandwidth limit.
24
Dual-Core Intel® Xeon® Processor 3000 Series Datasheet
INTEL [ INTEL ]
