Single element security fusible link

Details Single element security fusible link Single element security fusible link

1990-09-13

1993-12-14

Clawson, Jr., Joseph E.

Static information storage and retrieval

Read/write circuit

Having fuse element

365 52, 365 63, 36518901, 3072021, 3072965, 3073031, 307465, 307565, G11C 700

Patent

active

052709833

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.

REFERENCES:
patent: 4157480 (1979-06-01), Edwards
patent: 4417154 (1983-11-01), Kuo
patent: 4446534 (1984-05-01), Smith
patent: 4480199 (1984-10-01), Varshney et al.
patent: 4903111 (1990-02-01), Takemae et al.
patent: 4933898 (1990-06-01), Gilberg et al.
patent: 4935645 (1990-06-01), Lee
patent: 5065057 (1991-11-01), Kawasaki

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