This is the basic configuration of the LM339 as a comparator, requiring a 3k (3k3) pull-up resistor. The circuit is from the 1982 SGS Linear Integrated Circuits Manual.

This is the basic configuration of the LM339 as a comparator, requiring a 3k (3k3) pull-up resistor. The circuit is from the 1982 SGS Linear Integrated Circuits Manual.