Single element security fusible link
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United States of America Patent
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-
Dec 14, 1993
Grant Date -
N/A
app pub date -
Sep 13, 1990
filing date -
Sep 13, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An I/O circuit including first and second I/O pads, a fuse connected between the first pad and a RAM write enable line, and a diode-connected transistor connected between the RAM write enable line and second pad. Data is written to the RAM by applying a voltage potential to the pads after which the fuse is blown by increasing the potential difference. Other forms of the invention include a resistor connected between the RAM write enable line and ground, and I/O lines connected between the pads, respectively, and a logic circuit.
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