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FC80960HD66SL2GN View Datasheet(PDF) - Intel

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FC80960HD66SL2GN Datasheet PDF : 102 Pages
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80960HA/HD/HT
4.5
VCCPLL Pin Requirements
If the voltage on the VCCPLL power supply pin exceeds the VCC pin voltage by 0.5 V at any time,
including the power up and power down sequences, excessive currents can permanently damage
on-chip electrostatic discharge (ESD) protection diodes. The damage can accumulate over
multiple episodes.
Pragmatically, this problem only occurs when the VCCPLL and VCC pins are driven by separate
power supplies or voltage regulators. Applications that use one power supply for VCCPLL and
VCC are not typically at risk. Verify that your application does not allow the VCCPLL voltage to
exceed VCC by 0.5 V.
The VCCPL low-pass filter recommended in the Developer’s Manual does not promote this
problem.
Advance Information Datasheet
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