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Ultra-Low Power RX140 Microcontrollers for Enhanced Performance and Better Power Efficiency in Industrial Applications

Ultra-Low Power RX140 Microcontrollers
Ultra-Low Power RX140 Microcontrollers

Renesas Electronics has introduced ultra-low-power RX140 MCUs for improved noise tolerance and sensing accuracy through advanced touch sensing. These new MCUs with powerful RXv2 CPU core deliver over 30% better power efficiency for home and industrial applications with the operation of up to 48 MHz with a CoreMark score of 204. These microcontrollers fulfill the IEC EN61000-4-3 level 4 (radiated) and EN61000-4-6 level 3 (conducted) capacitive touch noise tolerance requirements and can detect changes in water level by directly measuring changes in capacitance through high-precision sensing. Moreover, these new microcontrollers feature the latest capacitive touch sensing units for enhanced user experience and user interface. 


The RX140 microcontrollers with Built-in multi-scan functionality and automated sensing enable customers to improve sensitivity through simultaneous measurement using multiple electrodes. The RX140 MCUs also feature improved peripheral functions and are designed for scalability and also maintain pin compatibility with the RX130, enabling customers to upgrade while continuing to make use of existing design resources.



  • CPU RXv2 core (48MHz maximum operating frequency)

  • Low power consumption (56μA/MHz during CPU operation, 0.25μA in standby mode)

  • Up to 256KB flash memory and 64KB SRAM

  • 8KB data flash that can store data just like an EEPROM

  • High-speed on-chip oscillator with +/- 1.0% accuracy

  • 1.8V to 5.5V wide operating voltage range

  • Updated Capacitive Touch Sensing Unit

  • SCI (UART, Simple SPI, Simple I2C)

  • SPI/I2C Multi-Master Interface

  • CAN Interface

  • 12-bit A/D converter, 8-bit D/A converter, temperature sensor

  • 32-bit general-purpose PWM timer, 16-bit general-purpose PWM timer, low power asynchronous general-purpose timer

  • Real-Time Clock



  • Home appliances

  • Industrial

  • Building automation

  • Home automation

  • Consumer


Availability and Pricing

The RX140 MCUs are available now in 32- to 64-pin packages with 64KB flash memory and the mass production for additional configurations and memory sizes over 128KB will be available starting in February 2022. The pricing of these microcontrollers will vary based on package and memory configuration. 

Component Datasheet

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