The SC91F721M16U is a 4KB, 256 byte FLASH 14 51 series SOP-16 Microcontroller Unit (MCU/MPU/SOC) ROHS manufactured by SinOne. It is a general-purpose MCU, containing a advanced 8-bit CPU core, as well as other useful peripheral options such as Timer, RTOS, ADC, PWM, SPI/I2C controllers, Watchdog Timer, and an enhanced serial communication interface. It is designed to be used in small embedded systems and is cost-effective for budget-sensitive projects. The SC91F721M16U offers features like low-power consumption, high-speed execution, and rich peripheral capabilities, making it a great option for a variety of projects. Moreover, the SC91F721M16U meets the strict ROHS standards for lead-free products and is available in the standard 16-pin SOP package, with excellent assembly compatibility.