What this RX130 MCU brings to the board
The Renesas R5F51303AGFM#30 is a 32-bit RX core MCU from the RX130 series, clocked at 32 MHz with 64 KB of Flash and 10K x 8 of RAM, plus an additional 8K x 8 of EEPROM for parameter storage without external EEPROM. It includes a capacitive touch sensing unit, DMA controller, LVD, POR, PWM timers, and a watchdog timer — all in a 64-pin LQFP package. The wide supply range from 1.8 V to 5.5 V and industrial temperature grade of -40°C to 105°C make it a fit for motor drives, outdoor telecom, factory automation panels, and HMI applications where touch control is needed without a separate touch controller IC.
Key features that shape the BOM
The capacitive touch peripheral is the headline differentiator here — it integrates self-capacitance and mutual-capacitance sensing directly into the MCU, saving a dedicated touch controller and its associated I²C or SPI bus. That matters for panel retrofits or new HMI designs where board space and BOM cost are tight. The 52 general-purpose I/O lines give enough headroom for a small keypad, a few LEDs, and a serial interface to a display or host controller. Data converters include a 14-channel 12-bit ADC and a 2-channel 8-bit DAC, sufficient for reading analog sensors (potentiometers, current shunts) and generating simple analog outputs or reference voltages. The 64 KB Flash and 10K x 8 RAM are modest — this is a control-oriented MCU, not a data-logging engine. If your firmware footprint exceeds 64 KB, step up to the RX130 family's higher-density variants.
Temperature grade and deployment environment
Rated for -40°C to 105°C ambient, this part is suited for industrial enclosures, engine-bay-adjacent electronics, outdoor base stations, and any environment where the PCB sees seasonal temperature swings or self-heating from nearby power stages. The 64-LQFP package (10x10 mm body) is a standard footprint for automated assembly and rework.
Lifecycle and sourcing posture
R5F51303AGFM#30 carries an Active lifecycle status from Renesas, with ROHS3 compliance confirmed. It is a current-production part, not subject to last-time-buy or end-of-life notices as of the latest records. For new designs, this MCU is a safe selection — no near-term obsolescence risk.