The SH79F0819X/028XU is a TSSOP-28 RoHS electronic component manufactured by Sinowealth. It is a 4-bit microcontroller with a low-voltage CMOS external logic, suitable for use with devices operating on voltages between 2.5 and 3.6V. The device is a 28-pin Surface-Mount Device (SMD) with a 1.5mm Maximum Height. It has a 4-bit bidirectional data bus and supports four 8-bit and one 8K×10-bit program memories and also features an array of internal circuitries including a Timer/Counter, interrupt blocks, an A/D converter, watchdog timer and a SW-interrupt terminal.