An unclocked electrically programmable fuse (eFUSE) system includes at
least two resistive voltage dividers, one voltage divider including an
eFUSE, and a differential amplifier. An output node of at least one of
the voltage dividers includes an eFUSE that changes an output voltage
based on a state of the eFUSE, and the differential amplifier changes the
output voltage into a digital output with no clocking capabilities.