HT66F017 is an 8-bit microcontroller produced by Holtek. It comes in a SOP-16_150mil chip form with RoHS compliant lead configuration. The packaged IC combines a Keil 8051 central processor unit (CPU) with an extensive peripheral feature set, allowing the device to be used in various types of applications. The built-in peripherals include a 10-bit 8-channel analog-to-digital converter (ADC), multiple serial interfaces, timers, and a controller unit for LCD, motor, keypad, and other uses. The device is especially suitable for consumer electronic products such as audio players and home appliances, as well as many embedded control applications. The device is also RoHS compliant, meaning it meets all EU directives about the use of hazardous chemicals in electronic components.