View max6672-max6673 datasheet:

19-2458; Rev 0; 10/02 PWM Output Temperature Sensors in SC70 Packages General Description Features The MAX6672/MAX6673 are low-current temperature Simple Single-Wire PWM Output sensors with a single-wire output. These temperature Tiny SC70 Package sensors convert the ambient temperature into a 1.4kHz PWM output, which contains the temperature informa- Low 60µA (typ) Supply Current Consumption tion in its duty cycle. The MAX6672 has an open-drain 1.4kHz Nominal Frequency output and the MAX6673 has a push-pull output. The MAX6672/MAX6673 operate from 2.4V to 5.5V with Choice of Outputs a maximum supply current of 150µA. Both devices fea- Open Drain (MAX6672) ture a single-wire output that minimizes the number of Push-Pull (MAX6673) pins necessary to interface with a