Maybe one of these? https://www.emmicroelectronic.com/catalog?title=&term_node_tid_depth=29 https://www.emmicroelectronic.com/catalog?title=&term_node_t... EM

Maybe one of these? https://www.emmicroelectronic.com/catalog?title=&term_node_tid_depth=29 https://www.emmicroelectronic.com/catalog?title=&term_node_t... EM Microelectronics is actually not so obscure. They belong to the Swatch group and are specialized in ultra lower power analog and mixed signal circuit. Obviously, first for watches.