RL78 Family of 8/16-bit Ultra-Low Energy MCUs

RL78 microcontrollers greatly improve power efficiency with industry-leading low power consumption at 45.5 μA/MHz consumption during normal operation and 0.57 μA/MHz during clock operation. Built-in features such as a high-precision (±1%) high-speed on-chip oscillator, background operation data flash capable of 1 million rewrites, temperature sensor, and interface ports for multiple power supplies help reduce system costs and size.

RL78 Family Brochure

RL78 Family Features

Highlighted Products

Bring products faster to market with the RL78 Fast Prototyping Board. Equipped with a RL78 family microcontroller, built-in emulator circuit and expanded interfaces (Arduino and Pmod™), the RL78 Fast Prototyping Board enables immediate evaluation and prototype development without additional tools. Check out the new Fast Prototyping Boards and a list of available Fast Prototyping Boards suitable for your applications. 


Family Lineup

RL78 Family


The RL78/G1x (general purpose group) is a true low power MCU series within the RL78 Family.

Group Flash (KB) RAM (KB) Pin Voltage (V) Max Freq (MHz) Features
RL78/G10 1-4 0.125-0.5 10-16 2-5.5 20 10-16 pin
RL78/G11 16 1.5 10-25 1.6-5.5 24 Low Pin, Configurable Analog, Power-Saving
RL78/G12 2-16 0.25-2 20-30 1.8-5.5 24 Standard (Small)
RL78/G13 16-512 2-32 20-128 1.6-5.5 32 Standard
RL78/G13A 384-512 24-32 44-100 1.6-5.5 32 Standard(Low Operating Current)
RL78/G14 16-512 2.5-48 30-100 1.6-5.5 32 High Function
RL78/G1A 16-64 2-4 25-64 1.6-3.6 32 Analog
RL78/G1C 32 5.5 32-48 2.4-5.5 24 USB
RL78/G1D 128-256 12-20 48 1.6-3.6 32 BLE(BluetoothLowEnegy)
RL78/G1E 32-64 2-4 64-80 1.6-5.5 32 Smart Analog
RL78/G1F 32-64 5.5 24-64 1.6-5.5 32 High Function/Motor
RL78/G1G 8-16 1.5 30-44 2.7-5.5 24 Small Motor
RL78/G1H 256-512 24-48 64 1.8-3.6 32 Sub-GHz
RL78/G1M 4-8 0.5-1 20 2-5.5 20 Realtime Output for Motor Control
RL78/G1N 4-8 0.5-1 20 2-5.5 20 High Current Output for LED Display
RL78/G1P 16 1.5 24-32 2.7-3.6 32 12-bit ADC, 10-bit DAC


The RL78/L1x microcontroller family is a peripheral rich family of true low power microcontrollers integrating LCD controller/driver, suitable for industrial and consumer LCD display applications. RL78/L1x offer unique display driver functionality to reduce system power consumption.

Group Flash (KB) RAM (KB) Pin Voltage (V) Max Freq (MHz) Features
RL78/L12 8-32 1-1.5 32-64 1.6-5.5 24 LCD (Small)
RL78/L13 16-128 1-8 64-80 1.6-5.5 24 LCD
RL78/L1A 48-128 5.5 80-100 1.8-3.6 24 LCD
RL78/L1C 64-256 8-16 80-100 1.6-3.6 24 LCD, USB


The RL78/I1x microcontrollers are part of the RL78 microcontroller family with rich analog integration and support high temperature operation. RL78/I1x is ideal for application specific solutions but also suitable for many general purpose application In the mass market with tough environment operation.

Group Flash (KB) RAM (KB) Pin Voltage (V) Max Freq (MHz) Features
RL78/I1A 32-64 2-4 20-38 2.7-5.5 32 High Function (High-Resolution PWM, High-Speed Comparator), High Temperature
RL78/I1B 64-128 6-8 80-100 1.9-5.5 24 Metering
RL78/I1C 64-256 6-16 64-100 1.7-5.5 32 Metering
RL78/I1D 8-32 0.7-3 20-48 1.6-3.6 24 Ultra Low Power, Analog (12-bit ADC with comparator, Op-amp)
RL78/I1E 32 8 32-36 2.4-5.5 32 Analog Front End + MCU, 24-bit Delta-Sigma


The RL78/F1x microcontrollers are suitable for automotive applications. As the successors of both the 78K0R and R8C, they realize low power consumption and are equipped with built-in functions suitable for automotive applications such as CAN communications, advanced timer, and safety functions.

Group Flash (KB) RAM (KB) Pin Voltage (V) Max Freq (MHz) Features
RL78/F13 16-128 1-8 20-80 2.7-5.5 32 Auto Body
RL78/F14 48-256 4-20 30-100 2.7-5.5 32 Auto Body
RL78/F15 128-512 10-32 48-144 2.7-5.5 32 Auto Body
RL78/F12 8-64 0.5-4 20-64 1.8-5.5 32 Auto Body

RL78/D1x (Automotive Only)

Renesas is introducing the RL78/D1x as an optimized solution for the BRICs and low-end instrument cluster markets. The RL78/D1x is the successor of 78K0/Dx2 or UPD78082x microcontrollers and suited for car instrument cluster, built-in car instrument cluster dedicated features such as Sound Generator, Stepper Motor Controller/Driver and LCD Segment Controller/Driver etc.

Group Flash (KB) RAM (KB) Pin Voltage (V) Max Freq (MHz) Features
RL78/D1A(Automotive Only) 24-512 2-24 48-128 2.7-5.5 32 -


The RL78/H1x microcontroller family is a peripheral rich family of true low power microcontrollers integrating analoig functions, suitable for healthcare applications.

Group Flash (KB) RAM (KB) Pin Voltage (V) Max Freq (MHz) Features
RL78/H1D 64-128 5.5-8 48-80 1.8-5.5 24 Ultra Low Power, Analog (10-bit ADC, Delta-Sigma A/D with PGA, Op-amp, PGA, D/A)
Development Tools

Software Tools

Development Environment for the Renesas RL78 Family MCUs

Renesas Electronics supports all aspects of application development for the RL78 Family with products such as the integrated development environments e² studio and CS+, real-time OSes, and programming tools.

Development Environment for the Renesas RL78 Family MCUs

RL78 Quick Solutions

The RL78 Quick Solutions page presents easy to build solutions that will assist in your product development.

Browse RL78 Quick Solutions

RL78 WEB Simulator

Carry out prototype development and power consumption simulation for the RL78 Family easily without purchasing development tools.

Simulate Now with RL78 WEB Simulator

Applilet EZ PL for RL78

The Applilet EZ PL for RL78 software that allows users with no programming language knowledge to easily create a MCU application program.

Create Applications with Applilet EZ PL

Road Map

RL78/F1A RL78/F15 RL78/F14 RL78/F13 RL78/F12 RL78/H1D RL78/I1C RL78/I1E RL78/I1D RL78/I1B RL78/I1A RL78/L1A RL78/L1C RL78/L12 RL78/L13 RL78/G12 RL78/G13 RL78/G13A RL78/G11 RL78/G1H RL78/G1F RL78/G1D RL78/G10 RL78/G1G RL78/G14 RL78/G1C RL78/G1A RL78/G1E RL78/G1P RL78/G1M RL78/G1N

Product Longevity Program(PLP)

Renesas Electronics is operating the Product Longevity Program (PLP) to help customers select the most appropriate part for applications that require long life cycles.