Vol 1

Electrical Specifications
108 Intel® Xeon® Product 2800/4800/8800 v2 Product Family
Datasheet Volume One, February 2014
Notes:
1. These specifications are measured at the processor pad.
2. Refer to Figure 6-25 for description of allowable Overshoot/Undershoot magnitude and duration.
3. T
CH
is the minimum high pulse width duration, see Table 6-25 through Table 6-28 for details on VMSE T
CH
.
4. For PWRGOOD DC specifications see Table 6-21 and Figure 6-24 “PWRGOOD Signal Waveform”.
§
Table 6-29. Processor I/O Overshoot/Undershoot Specifications
Signal Group
Minimum
Undershoot
Maximum
Overshoot
Overshoot
Duration
Undershoot
Duration
Notes
Intel QuickPath Interconnect -0.2 * VTT 1.2 * VTT 39 ps 15 ps 1,2
Processor Asynchronous Sideband Signals -0.35 * VTT 1.35 * VTT 1.25 ns 0.5 ns 1,2
System Reference Clock (BCLK{0/1}) -0.3V 1.15V N/A N/A 1,2
Miscellaneous Signals -0.35*Vtt 1.35*Vtt
PWRGOOD Signal -0.420V VTT + 0.28 N/A N/A 4
Figure 6-25. Maximum Acceptable Overshoot/Undershoot Waveform
V
SS
Over Shoot
Under Shoot
Over Shoot
Duration
Under Shoot
Duration