Electrical Specifications
2.
The loadlines specify voltage limits at the die. Die VccCache voltage is available at the Vcachesense and
Vsscachesense lands and should be measured there. Voltage regulation feedback for voltage regulator
circuits must also be taken from the processor VCACHESENSE and VSSCACHESENSE lands. Refer to the
Voltage Regulator Module (VRM) and Enterprise Voltage Regulator Down (EVRD) 11.1 Design Guidelines for
socket load line guidelines and VR implementation.
Figure 2-2. Vcache Static and Transient Tolerance
Load (A)
0
5
10 15 20 25 30 35 40 45 50 55 60 65 70 75
0.00
-0.01
-0.02
-0.03
-0.04
-0.05
-0.06
-0.07
-0.08
-0.09
-0.10
-0.11
-0.12
-0.13
-0.14
-0.15
1.4 mOhm Load Line
Vcc max
Vcc min
Vcc typ
Table 2-8.
VCC and Vcache overshoot Specification
Symbol
Parameter
Min
Max
Units
Figure
Notes
Magnitude of Vcc Overshoot above
VID
V
T
0.05
V
2-3
OS_MAX
Time duration of V Overshoot
CC
25
μs
2-3
OS_MAX
above VID
The Intel Xeon Processor E7-8800/4800/2800 Product Families processor can tolerate
short transient overshoot events where supplied voltage exceeds the VID/CVID voltage
when transitioning from a high-to-low current load condition. This overshoot cannot
exceed VID/CVID + VOS_MAX. (VOS_MAX is the maximum allowable overshoot above
VID/CVID). These specifications apply to the processor die voltages, as measured with
respect to VSSCORESENSE, and VSSCACHESENSE.
Datasheet Volume 1 of 2
25
INTEL [ INTEL ]
