4 layers11.2 × 18 mm

Boards in 2 GitHub repositories, designed in KiCad, that use the ATMEGA168A-MMH by Microchip Technology (-40℃~+85℃ 1.8V~5.5V 10bit 16KB 1KB 20MHz 23 512Byte 8 Bit AVR Built-in FLASH VQFN-28(4x4) Microcontrollers (MCU/MPU/SOC) ROHS). See how each wires it, with its parts, size, README and files; the ATMEGA168A-MMH’s symbol, footprint and pinout are on its own page.