Method and circuit for eFuse protection

Details Method and circuit for eFuse protection Method and circuit for eFuse protection

2011-08-30

2011-08-30

Leja, Ronald W (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

Reexamination Certificate

active

08009397

ABSTRACT:
An eFuse (electronic fuse) circuit has a first detector for determining whether an ESD (electrostatic discharge) event occurs at a circuit pad of an integrated circuit and provides an ESD trigger signal in response thereto. A second detector detects a presence of a first power supply voltage and provides a power on signal indicating the presence of the first power supply voltage. A fuse is permitted to be programmable when no detection of the ESD event occurs and at the same time a presence of the power on signal is detected. The fuse is not permitted to be programmed when an ESD event is detected or when there is an absence of the power on signal. An array of fuses is thereby protected from inadvertent programming from an ESD event or powering up an integrated circuit.

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PCT Application No. PCT/US2009/036758 Search Report and Written Opinion, Mailed Jan. 27, 2010.

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