This part is a kind of semiconductor called HT46R46.

Function of this product has (HT46R46 / HT46R47) Cost-Effective A/D Type 8-Bit MCU.

Manufacturers : Holtek Semiconductor

Image and pinout :

Some of the text within the PDF file :

HT46R46/HT46C46/HT46R47/HT46C47 Cost-Effective A/D Type 8-Bit MCU Features · Operating voltage: · Up to 0.5ms instruction cycle with 8MHz system clock fSYS=4MHz: 2.2V~5.5V fSYS=8MHz: 3.3V~5.5V · 13 bidirectional I/O lines (max.) · 1 interrupt input shared with an I/O line · 8-bit programmable timer/event counter with overflow at VDD=5V · 4-level subroutine nesting for HT46R46/HT46C46 · 6-level subroutine nesting for HT46R47/HT46C47 · 4 channels 8-bit resolution A/D converter for HT46R46/HT46C46 · 4 channels 9-bit resolution A/D converter interrupt and 7-stage prescaler · On-chip crystal and RC oscillator · Watchdog Timer · 1024´14 program memory for HT46R46/HT46C46 · 2048´14 program memory for HT46R47/HT46C47 · 64´8 data memory RAM · Supports PFD [ ... ]

HT46R46 PDF Datasheet Download