Abstract: A one transistor, non-volatile programmable switch includes uni-directional and in some embodiments, bi-directional, states. The programmable switch is used in an integrated circuit, and comprises a first node and a second node coupled with corresponding circuit elements in the integrated circuit. A non-volatile programmable transistor having a drain coupled to one of the first node and second node, a source coupled to the other of the first node and second node, gate coupled to an energizing conductor, and a data storage structure constitute the programmable switch. The non-volatile programmable transistor used in the switch is a charge programmable device (e.g. SONOS cell), in which the data storage structure comprises a nitride layer, or other charge trapping layer, between oxides or other insulators.