The A42MX36-CQ256BX3 is a microcontroller from Microchip Technology. It is one of the members of the AVR/STAGEL family of devices, which are designed for embedded applications. The A42MX36-CQ256BX3 is a 36-pin SMD device, operating on a 4MHz-40MHz clock, with a 7KB of SRAM, 256KB of flash memory, and a 16-bit AVR-LIB Core. It also includes I/O ports, peripherals such as 6x UART, 4x SPI, 1x I2S, 2x Timers/Counters, 1x PWM, and 1x ADC. The maximum junction temperature for the A42MX36-CQ256BX3 is 150° C.