120 MHz RXv3 — deterministic execution for real-time loops
The Renesas R5F5671EDDFB#30 is a 32-bit single-core MCU from the RX671 family, built around the RXv3 CPU core clocked at 120 MHz. No cache means instruction timing is cycle-countable — useful for motor-control FOC loops, PFC algorithms, or any closed-loop application where jitter in the control law costs efficiency. The 2 MB on-chip Flash gives room for a full application stack plus OTA staging, and the 144-pin LQFP brings out 113 I/O so you can keep a parallel display bus, a CAN transceiver, and USB host all on the same part without a port expander.
Peripheral mix — capacitive touch, CAN, USB, and 20-channel 12-bit ADC
On-chip peripherals include a capacitive touch sensing unit, which saves a dedicated touch controller and its I²C wiring on HMI panels or appliance interfaces. The connectivity set covers CANbus, I²C, LINbus, QSPI, SCI, SPI, and USB — enough for an industrial gateway node that bridges a CAN fieldbus to a USB host. The 20-channel 12-bit ADC samples at rates adequate for current sensing on a three-phase motor drive, though the exact conversion speed isn't listed here. Internal oscillator means you can bring up the core without an external crystal, though the accuracy budget will depend on the application's timing requirements.
Temperature grade and supply — industrial range, 2.7 V rail
Supply voltage is 2.7 V — a single 3.3 V rail with a small LDO will work, but check the regulator's dropout against the 2.7 V minimum if you're running from a battery that sags under load. The 144-LQFP package is a hand-solderable footprint for prototyping, though production reflow profiles should follow the MSL rating on the bag.
Active lifecycle — no near-term redesign pressure
Renesas lists the R5F5671EDDFB#30 with an Active product status. That means full datasheet support, current toolchain compatibility (Renesas RX compiler, e² studio, FSP), and no last-time-buy clock ticking. For a new design starting today, you're not locking into a part that will force a respin in two years. The RX671 family is the current mainstream RX core — not a legacy line.