RL78/G22

Features

CPU: RL78 core, Max. 32MHz
Voltage: 1.6V to 5.5V
Package: 16-pin to 48-pin
Memory: Program Flash: 32KB to 64KB, SRAM 4KB, Data Flash 2KB
Operating temperature range: up to 105 °C
Enhanced Capacitive Sensing Unit (CTSU2L)
Timer: 16-bit Timer (ch) x 8, Watchdog Timer (ch) x 1, 32-bit Interval Timer x 1 ch
PWM: PWM Output x 7
Analog function: 10-bit A/D Converter (ch) x 10
On-chip Oscillator Freq. (MHz): High-Speed: up to 32MHz
Middle-Speed: up to 4MHz
Low-speed: 32.768kHz
Snooze mode sequencer
Event link controller
Others: RTC, Power-On Reset, Low Voltage Detection
Packages: SSOP, LQFP, HWQFN, WFLGA

Find Other Products in RL78 Low-Power 8 & 16-Bit MCUs

Description

The RL78/G22 microcontroller features the industry's lowest current consumption levels of 37.5µA/MHz during CPU operation and 200nA during STOP, as well as a rich array of capacitive touch channels.

The RL78/G22 microcontroller supports a maximum operating frequency of 32MHz, a wide operating voltage range of 1.6V to 5.5V, and enhanced analog and security functions. In addition, the SNOOZE mode sequencer significantly reduces power consumption during intermittent operation. A rich development environment is provided for the RL78/G22 including an evaluation board (Fast Prototyping Board) that enables program writing/debugging without additional tools, simply by connecting a USB cable, and a Smart Configurator that facilitates design using a GUI. It is also compatible with the existing RL78 family and can be a seamless replacement, making it suitable for a wide range of applications from home appliances and consumer electronics to industrial equipment.

The EEMBC (Embedded Microprocessor Benchmark Consortium) benchmark “ULPMark-PP (ULPMark-Peripheral Profile)” has registered the new score of 330 (1.8V) and 190 (3.0V) as the world's highest score for a microcontroller (as of September 10, 2025). ULPMark-PP is an international benchmark for quantitatively evaluating the energy efficiency of peripheral functions integrated within microcontrollers.

Parameters

Attributes	Value
Program Memory (KB)	32, 64
Data Flash (KB)	2
RAM (KB)	4
Carrier Type	Full Carton (Tray), Full Tray (Tray), Magazine, Tape & Reel
Supply Voltage (V)	1.6 - 5.5
I/O Ports	12, 16, 20, 21, 26, 28, 32, 36, 40, 44
Temp. Range (°C)	-40 to +85, -40 to +105
Operating Freq (Max) (MHz)	32
USB FS (host ch/device ch)	( 0 / 0 )
SCI or UART (ch)	1, 2, 3, 4
SPI (ch)	1, 2, 3, 4, 5
I2C (#)	2, 3, 4, 5, 6
CAN (ch)	0
CAN-FD (ch)	0
Wireless	No
LIN (#)	0, 1
16-Bit Timer (ch) (#)	8
12-Bit A/D Converter (ch)	0
10-Bit A/D Converter (ch)	3, 6, 8, 9, 10
24-Bit Sigma-Delta A/D Converter (ch)	0
12-Bit D/A Converter (ch)	0
10-Bit D/A Converter (ch) (#)	0
8-Bit D/A Converter (ch)	0
Capacitive Touch Sensing Unit (ch)	5, 9, 11, 12, 16, 17, 21, 23, 25, 29
Segment LCD Controller	No
Security & Encryption	Unique ID,TRNG

Package Options

Pkg. Type	Pkg. Dimensions (mm)	Lead Count (#)	Pitch (mm)
HWQFN	3 x 3 x 0.8	16	0.5
HWQFN	4 x 4 x 0.8	24	0.5
HWQFN	5 x 5 x 0.8	32	0.5
HWQFN	6 x 6 x 0.8	40	0.5
HWQFN	7 x 7 x 0.8	48	0.5
LFQFP	7 x 7 x 1.7	48	0.5
LQFP	7 x 7 x 1.7	32	0.8
LQFP	10 x 10 x 1.6	44	0.8
LSSOP	6 x 4 x 1.45	20	0.65
LSSOP	9.85 x 6.1 x 1.4	30	0.65
WFLGA	3 x 3 x 0.76	25	0.5
WFLGA	4 x 4 x 0.76	36	0.5

Application Block Diagrams

	Advanced Low-Power Wireless HMI for Household Appliances Advanced low-power HMI with Wi-Fi 6 and Bluetooth 5.1 enables seamless smart appliance control.
	Automatic Pet Door & Tracking System Smart pet door with tag system for automatic entry and lost-pet tracking via proximity detection.
	Heatstroke Prevention Watch A low-power wearable detects heatstroke risks and alerts users to take early action.
	Smoke Detector for Commercial Buildings Commerical smoke detector system for fire alarms achieves ultra-low power consumption with a simple configuration.
	Access Control System with NFC, Camera, and Capacitive Touch Authentication The access control system ensures security with NFC, Wi-Fi, PoE, local storage, and flexible OS support.