The UPD78906x Group is supported only for the customers who have already adopted any of the products. For new adoption, please consider other products such as RL78/G13 Group.

Main Solutions

Key Features:

  • Operating voltage: VDD = 1.8 to 3.6 V
  • Max. frequency: 5 MHz
  • ROM capacities: 4 KB mask ROM and 4 KB EEPROM
  • RAM capacities: 128 bytes
  • 20-pin plastic SSOP package
  • System clock: Ceramic/crystal oscillation
  • Minimum instruction execution time can be changed from high-speed (2.0 µs) to low-speed (8.0 µs) at 5.0 MHz operation with system clock.
  • I/O ports: 14
  • Timer: 3 channels
    • 8-bit timer: 2 channels
    • Watchdog timer: 1 channel


  • On-chip power-on-clear circuit (µPD78E9861A only)
  • On-chip bit sequential buffer
  • Operating ambient temperature: TA = -40 to +85°C


Pin Count / Memory Size Lineup:

Below you will find information to support the development of your application.
You can find an explanation of orderable part numbers here.


Resources for Software and Hardware

Title Description
My Renesas Create a My Renesas account to use our tool download services, receive e-newsletter/update notifications, and take advantage of our other services.
e-learning Information for studying and learning about microcontrollers and microprocessors.
FAQ Frequently asked questions and useful hints for development.
Forum A forum and community site to share technical information, questions and opinions with others who use Renesas products.
Video Watch videos related to this product.


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