SNOAA35D April 2023 – December 2023 LM2901 , LM2901B , LM2901B-Q1 , LM2903 , LM2903-Q1 , LM2903B , LM2903B-Q1 , LM339 , LM339-N , LM393 , LM393-N , LM393B , LM397 , TL331 , TL331-Q1 , TL331B
The LM339, LM393 and their variants are among the most popular, cost effective and long-lived standard comparators. Using this app note to understand their pros, cons and how they differ from more modern comparators will increase the likelihood of a successful design. Although most analog designers will continue to use these devices, improvements in op amp design, process technology and our understanding of comparator applications over the past four decades have led to the development of better and easier to use comparators.