Temperature sensor circuit and semiconductor device including the same

A semiconductor device comprising:

• a first circuit disposed on a first portion of a semiconductor substrate;
• and
• a second circuit disposed on a second portion of the semiconductor substrate,
• wherein each of the first and second circuits comprises a temperature sensor circuit, the temperature sensor circuit comprising:
• a ring oscillator suitable for being enabled according to an enable signal, and outputting a square wave signal with a first frequency;
• a divider suitable for dividing the first frequency of the square wave signal from the ring oscillator to generate a pulse signal with a second frequency;
• a counter suitable for counting a time interval of the pulse signal outputted from the divider according to an external clock to generate a count signal;
• a latch suitable for temporarily storing a value of the counter signal according to the pulse signal, and outputting a digital code;
• and
• a supply voltage monitor suitable for being enabled according to the pulse signal, comparing a reference voltage to one or more comparison voltages and generating a switching logic signal, the reference voltage being kept at a substantially constant level when a level of a supply voltage changes.

A semiconductor device comprising:

• a first circuit disposed on a first portion of a semiconductor substrate;
• and
• a second circuit disposed on a second portion of the semiconductor substrate,
• wherein each of the first and second circuits comprises a temperature sensor circuit, the temperature sensor circuit comprising:
• a ring oscillator suitable for being enabled according to an enable signal, and outputting a square wave signal with a first frequency;
• a divider suitable for dividing the first frequency of the square wave signal from the ring oscillator to generate a pulse signal with a second frequency;
• a counter suitable for counting a time interval of the pulse signal outputted from the divider according to an external clock to generate a count signal;
• a latch suitable for temporarily storing a value of the counter signal according to the pulse signal, and outputting a digital code;
• and
• a supply voltage monitor suitable for being enabled according to the pulse signal, comparing a reference voltage to one or more comparison voltages and generating a switching logic signal, the reference voltage being kept at a substantially constant level when a level of a supply voltage changes, and
• wherein the supply voltage monitor comprises:
• a reference voltage generation circuit suitable for receiving the supply voltage and generating the reference voltage;
• a comparison voltage generation circuit suitable for generating the comparison voltages having different levels that are proportional to the level of the supply voltage;
• a comparison circuit suitable for comparing the reference voltage and the comparison voltages and generating a plurality of comparison signals indicating respective comparison values;
• and
• an analog-to-digital converter suitable for converting value of the plurality of comparison signals into digital values and generating the switching logic signal indicative of the digital values.