32 MHz RX core with 64 KB Flash — what it means for a motor-control or sensor node
The Renesas R5F513T3ADNH#20 is a 32-bit RX-family MCU from the RX13T series, built around a 32 MHz RX core with 64 KB of Flash program memory, 12 KB of RAM, and 4 KB of on-chip EEPROM. It packs 22 general-purpose I/O lines, a 12-bit ADC with 8 channels, a single 8-bit DAC, and serial interfaces covering I²C, LINbus, SCI, and SPI. The wide supply range of 2.7 V to 5.5 V lets it sit on either a 3.3 V or 5 V rail without an external regulator, and the -40°C to 85°C temperature grade suits industrial environments like motor drives, sensor interfaces, and factory-automation I/O modules.
On-chip EEPROM and wide supply — two decisions that simplify the BOM
The 4 KB EEPROM eliminates the need for a separate serial EEPROM for calibration constants or configuration parameters, saving board space and reducing procurement complexity. The 2.7 V to 5.5 V supply range means the same MCU can be used across designs with different power rails — a single BOM line covers both 3.3 V and 5 V variants, which simplifies inventory management for multi-voltage product families.
Package and layout: 32-WFQFN with exposed pad
The R5F513T3ADNH#20 comes in a 32-WFQFN exposed-pad package (5x5 mm body, supplier device package 32-HWQFN). The exposed thermal pad needs a via stitch to the ground plane for adequate heat dissipation — without it, the junction temperature rises quickly above 400 mA continuous load. The 22 I/O are all 5 V-tolerant, which simplifies level translation when interfacing with 5 V peripherals or legacy sensor outputs.
Active lifecycle — no end-of-life risk for production builds
Renesas lists the R5F513T3ADNH#20 as Active with ROHS3 compliance.