INPUT PROTECTIVE CIRCUIT, ANTIFUSE ADDRESS DETECTION CIRCUIT AND SEMICONDUCTOR INTEGRATED-CIRCUIT DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an input protective circuit which performs a programming operation precisely by using a high voltage, to provide an antifuse address detection circuit and to provide a semiconductor integrated-circuit device. SOLUTION: An input protective circuit in a semiconductor integrated-circuit device has a bipolar transistor laid out with reference to a wiring layer M1a. An N-type active region 106 in the bipolar transistor is connected to the electrode 116 of a programmed element. The electrode 116 is connected to the wiring layer M1a. The wiring layer M1a supplies a high voltage in order to damage the dielectric of the programmed element. The voltage of a P-type well 104 is adjusted from the outside via a resistance element N10. Thereby, an erroneous program due to a surge coming from the wiring layer M1a can be prevented.