View max6676-max6677 datasheet:

19-2660; Rev 0; 10/02 Low-Voltage, 1.8kHz PWM Output Temperature Sensors General Description Features The MAX6676/MAX6677 are high-accuracy, low-power Simple Single-Wire, 1.8kHz PWM Output temperature sensors with a single-wire output. The Operates Down to 1.8V MAX6676/MAX6677 convert the ambient temperature High Accuracy into a ratiometric PWM output with temperature informa- ±1.5°C at TA = +25°C tion contained in the duty cycle of the output square ±3.0°C at TA = 0°C to +85°C wave. The MAX6676 has an open-drain output and the MAX6677 has a push-pull output. Operates from -40°C to +125°C The MAX6676/MAX6677 are specified for operation Low 80µA Typical Current Consumption with power-supply voltages from 1.8V to 3.6V, or from Small 6-Pin SOT23 Package 3.6V to 5.5V. T