Abstract: A pollution detection circuit and a pollution detection method for data lines are provided. The pollution detection circuit and the method detect an impedance of at least one data terminal for detecting the pollution occurring at the data terminal or the data lines. The pollution occurring at the data terminal or the data lines is confirmed when the impedance is low.

Abstract: A pollution detection circuit and a pollution detection method for data lines are provided. The pollution detection circuit and the method detect an impedance of at least one data terminal for detecting the pollution occurring at the data terminal or the data lines. The pollution occurring at the data terminal or the data lines is confirmed when the impedance is low.

Abstract: A static electrostatic discharge (ESD) protection circuit for the programming voltage line of an electrically erasable programmable read only memory (EEPROM) includes a pair of multiplexors consisting of MOS pass transistors for selecting between the power supply voltage and programmning voltage to be supplied to the EEPROM for its normal and programming modes of operation, respectively. One of the multiplexors performs the voltage selection in accordance with an externally generated differential control signal and a biasing voltage from the second multiplexor. The second multiplexor, in accordance with one of the phases of the differential control signal, automatically selects either the power supply voltage or programming voltage, whichever is larger, for use as the biasing voltage supplied to the first multiplexor.