The 766-40-40 is a 4-bit high-performance microcontroller from Renesas. It is part of the RL78 microcontroller family which is known for its low power consumption and high usability. The 766-40-40 has on-chip features such as an 8-bit A/D converter, a timer, I/O ports, interrupt controllers, and a 16-bit timer/counter. It also has up to 1.5K bytes of ROM, 64 bytes of RAM, and 4K bytes of flash memory. The 766-40-40 has a wide operating temperature range of -40°C to +85°C and is suitable for automotive, industrial, and consumer applications.