STMicroelectronics, 8bit STM8, STM8L Microcontroller, 16MHz, 4 kB Flash, 20-Pin TSSOP

The STM8L is based on the 8-bit STM8 core
Ultra-low power consumption with the lowest power mode of 0.35μA
STM8L101: Lowest power mode 0.35μA, Dynamic run mode 150μA/MHz
STM8L151/152: Lowest power mode 0.4μA, Dynamic run mode 192μA/MHz

STM8 8-Bit Microcontrollers, STMicroelectronics

The STM8 platform is implemented around a high-performance 8-bit core and a state-of-the-art set of peripherals. The 8-bit microcontroller operates at 16/24MHz, featuring flash memory up to 128kB, internal RAM and EEPROM, 8/16-bit timers, A/D Converters, D/A Converters, Comparators, Serial Interfaces and an optional Display controller.