Intel Z670 AY80609007293AA Data Sheet
Product codes
AY80609007293AA
Electrical Specifications
22
Datasheet
4
Electrical Specifications
This chapter contains signal group descriptions, absolute maximum ratings, voltage
identification and power sequencing. This chapter also includes DC specifications.
4.1
Power and Ground Balls
The processor has Vcc and Vss (ground) inputs for on-chip power distribution. All
power balls must be connected to their respective processor power planes, while all
Vss balls must be connected to the system ground plane. Use of multiple power and
ground planes is recommended to reduce I*R drop. The Vcc balls must be supplied
with the voltage determined by the processor Voltage Identification (VID) signals.
4.2
Decoupling Guidelines
Due to large number of transistors and high internal clock speeds, the processor is
capable of generating large current swings between low and full power states. This
may cause voltages on power planes to sag below their minimum values, if bulk
decoupling is not adequate. Larger bulk storage (C
BULK
), such as electrolytic
capacitors, supply current during longer lasting changes in current demand (for
example, coming out of an idle condition). Similarly, capacitors act as a storage well
for current when entering an idle condition from a running condition. To keep
voltages within specification, output decoupling must be properly designed.
Caution: Design the board to ensure that the voltage provided to the processor remains within
the specification. Failure to do so can result in timing violations or reduced lifetime of
the processor.
4.3
Voltage Rail Decoupling
The voltage regulator solution needs to provide:
•
•
Bulk capacitance with low effective series resistance (ESR).
•
A low path impedance from the regulator to the processor.
•
Bulk decoupling to compensate for large current swings generated during power-
on, or low-power idle state entry/exit.
The power delivery solution must ensure that the voltage and current specifications