Abstract: An inventive programmable circuit stores a bit (i.e., a "1"or a "0") as the result of one of a pair of anti-fuses of the circuit connected in series between a supply voltage V.sub.cc and ground V.sub.ss being blown. If the anti-fuse connected to the supply voltage V.sub.cc is blown, the supply voltage V.sub.cc passes through the anti-fuse to a node between the series-connected anti-fuses. If, instead, the anti-fuse connected to ground V.sub.ss is blown, the node between the anti-fuses is connected to ground through the blown anti-fuse. The voltage on the node (i.e., V.sub.cc or V.sub.ss) may then be output from the programmable circuit as being representative of the bit stored in the circuit. Because only one of the anti-fuses is blown, no direct path exists between the supply voltage V.sub.cc and ground V.sub.ss, so the programmable circuit does not waste current as prior circuits are known to do.

Abstract: In a microcircuit device such as a memory chip, where a bank of fuse-controlled latch pulse routing-circuits are used to program redundant circuits or other programming options with every memory cycle or multiple thereof, the amount of current drawn by every fuse-control circuit is reduced by controlling each bank of circuits with a bank-enabling, fuse-programmed circuit between the latch pulse source and the bank of fuse-controlled programing circuits, and by adding a second fuse into each programming circuit; whereby, the bank of programming circuits can be enabled by alternately blowing one of two fuses in the bank-enabling circuit, and each programing logic can be set by alternately blowing one of its pair of fuses, thus cutting off any current path through the programming circuit regardless of the programming state of the circuit.

Abstract: In a microcircuit device such as a memory chip, where a bank of fuse-controlled latch pulse routing-circuits are used to program redundant circuits or other programming options with every memory cycle or multiple thereof, the amount of current drawn by every fuse-control circuit is reduced by controlling each bank of circuits with a bank-enabling, fuse-programmed circuit between the latch pulse source and the bank of fuse-controlled programing circuits, and by adding a second fuse into each programing circuit; whereby, the bank of programming circuits can be enabled by alternately blowing one of two fuses in the bank-enabling circuit, and each programming logic can set by alternately blowing one of its pair of fuses thus cutting off any current path through the programing circuit regardless of the programing state of the circuit.

Abstract: In a microcircuit device such as a memory chip, where a bank of fuse-controlled latch pulse routing-circuits are used to program redundant circuits or other programming options with every memory cycle or multiple thereof, the amount of current drawn by every fuse-control circuit is reduced by controlling each bank of circuits with a bank-enabling, fuse-programmed circuit between the latch pulse source and the bank of fuse-controlled programming circuits, and by adding a second fuse into each programming circuit; whereby, the bank of programing circuits can be enabled by alternately blowing one of two fuses in the bank-enabling circuit, and each programming logic can set by alternately blowing one of its pair of fuses thus cutting off any current path through the programming circuit regardless of the programming state of the circuit.