This document describes the features, pinout, mechanical data and ordering information of the medium density STM8L15x devices (STM8L151Cx/Kx/Gx, STM8L152Cx/Kx microcontrollers with a 16-Kbyte or 32-Kbyte Flash memory density). These devices are referred to as medium density devices in the STM8L15x and STM8L16x reference manual (RM0031) and in the STM8L Flash programming manual (PM0054).