SemiconductorThe HT46R066B is a microcontroller unit (MCU) designed and manufactured by Holtek Semiconductor. It features the HT46R0x6 8bit RISC core and is packaged in a SOP-28_300mil RoHS compliant package. The device features on-chip features such as internal Flash Memory with PWM functionalities, Watchdog Timer, Power-on Reset, Data EEPROM, Power-Saving Modes, and current-detection functionality. It also integrates features such as a Single-wire Address Programming Interface (SWAP-I), a Real-time clock /calendar (RTCC) with Year/Month/Day/Hour/Min/Sec Registers and programmable 1kHz/4kHz timebase with temperature compensation, a system tick timer, and a low-power Mode for applying periodic wake-up and sleep operations with GSM/3G/GPS Applications. The device can operated over the voltage range of 2.4V - 5.5V at +25°C ambient temperature. It is suitable for automotive, consumer, and industrial applications.