System and method for disabling static current paths in fuse logic

摘要

A plurality of programmable fuse circuits 20 is provided with a disabling static current path configured on an integrated circuit to correspond to a serial number. Each one of the programmable fuse circuits 20 includes a controllable switch 26, a load device 24 and at least one fuse 22, all of which are connected in series between a source VDD and ground GND so as to share a static current path. The controllable switch 26 is preferably a transistor and can be selectively controlled to enable or disable the current path of the programmable fuse circuit 20. When the controllable switches 26 are conductive, the logical state of the programmable fuse circuits can be read such that the serial number can be determined. When the controllable switches 26 are non-conductive, the programmable fuse circuits 20 are disabled to save power.