View max6666 datasheet:

19-2138; Rev 0; 7/01 High-Accuracy PWM Output Temperature Sensors General Description Features The MAX6666/MAX6667 are high-accuracy, low-cost, ¦ Simple Single-Wire PWM Output low-power temperature sensors with a single-wire ¦ ±1.0°C Accuracy at +25°C output. The MAX6666/MAX6667 convert the ambient temperature into a ratiometric PWM output with temper- ¦ High Accuracy ature information contained in the duty cycle of the out- ±1°C at TA = +30°C put square wave. The MAX6666 has a push-pull output ±2.5°C at TA = +10°C to +50°C and the MAX6667 has an open-drain output. ¦ Operate Up to +125°C The MAX6666/MAX6667 operate at supply voltages from +3V to +5.5V. The typical unloaded supply current ¦ Low 200µA Typical Current Consumption at 5.0V is 200µA. Both devices feature a