Datasheet

Intel® Xeon® Processor E5-2400 v3 Product Family 39
Datasheet Volume One
Electrical Specifications
Notes:
1. These specifications are measured at the processor pad.
2. Refer to Figure 2-10 for description of allowable Overshoot/Undershoot magnitude and duration.
3. TCH is the minimum high pulse width duration.
4. For PWRGOOD DC specifications see Table 2-20.
2.11.5.1 Overshoot/Undershoot Magnitude
Overshoot/Undershoot magnitude describes the maximum potential difference between
a signal and its voltage reference level. For the processor, both overshoot and
undershoot magnitude are referenced to V
SS
. It is important to note that the overshoot
and undershoot conditions are separate and their impact must be determined
independently.
The pulse magnitude and duration, and activity factor must be used to determine if the
overshoot/undershoot pulse is within specifications.
2.11.5.2 Overshoot/Undershoot Pulse Duration
Overshoot/undershoot pulse duration describes the total amount of time that an
overshoot/undershoot event exceeds the overshoot/undershoot reference voltage. The
total time could encompass several oscillations above the reference voltage. Multiple
overshoot/undershoot pulses within a single overshoot/undershoot event may need to
be measured to determine the total pulse duration.
Note: Oscillations below the reference voltage cannot be subtracted from the total
overshoot/undershoot pulse duration.
2.11.5.3 Activity Factor
Activity factor (AF) describes the frequency of overshoot (or undershoot) occurrence
relative to a clock. Since the highest frequency of assertion of any common clock signal
is every other clock, an AF = 0.1 indicates that the specific overshoot (or undershoot)
waveform occurs every other clock cycle.
The specification provided in the table shows the maximum pulse duration allowed for a
given overshoot/undershoot magnitude at a specific activity factor. Each table entry is
independent of all others, meaning that the pulse duration reflects the existence of
overshoot/undershoot events of that magnitude ONLY. A platform with an
overshoot/undershoot that just meets the pulse duration for a specific magnitude
where the AF < 0.1, means that there can be no other overshoot/undershoot events,
even of lesser magnitude (note that if AF = 0.1, then the event occurs at all times and
no other events can occur).
DDR3 -0.2 * V
CCD
1.2 * V
CCD
0.25*T
CH
0.1*T
CH
1,2,3
System Reference Clock (BCLK{0/1}) -0.3V 1.15V N/A N/A 1,2
PWRGOOD Signal -0.42V V
CCIO_IN
+ 0.28 1.25 ns 0.5 ns 4
Table 2-22. Processor I/O Overshoot/Undershoot Specifications (Sheet 2 of 2)
Signal Group
Minimum
Undershoot
Maximum
Overshoot
Overshoot
Duration
Undershoot
Duration
Notes