4 layers76.4 × 74.9 mm

Boards in 1 GitHub repository, designed in KiCad, that use the STWD100YNXWY3F by STMicroelectronics (-40℃~+125℃@(Ta) 102ms 13uA 2.7V~5.5V Open Drain、Push-pull Watchdog Timer Yes SOT-23-5 Supervisor and Reset ICs ROHS). See how each wires it, with its parts, size, README and files; the STWD100YNXWY3F’s symbol, footprint and pinout are on its own page.
