Renesas R5F5631BDDLK#U0

Overview

R5F5631BDDLK#U0 from Renesas is a 100 MHz 32-bit RX CPU core microcontroller in the RX631 Group, featuring 1 MB on-chip flash memory, 128 KB SRAM, 32 KB data flash, and integrated 12-bit/10-bit A/D converters, 10-bit D/A converters, RTC, and CAN interface - designed for industrial control and networked embedded systems without Ethernet.

For engineers reviewing the R5F5631BDDLK#U0 datasheet, R5F5631BDDLK#U0 pinout, R5F5631BDDLK#U0 application, or R5F5631BDDLK#U0 equivalent, this MCU delivers deterministic real-time performance with IEEE-754 FPU, low-power modes (down to 500 µA/MHz), JTAG/FINE debug support, and IEC60730 safety features for certified appliance and motor-control designs.

Technical Context

The R5F5631BDDLK#U0 implements the RXv1 CPU core with 5-stage CISC Harvard pipeline, supporting 165 DMIPS at 100 MHz and single-cycle 32×32-bit multiply. It integrates a memory protection unit (MPU), dual-clock domain (ICLK up to 100 MHz, PCLK up to 50 MHz), and independent watchdog timer (IWDT) driven by dedicated 125-kHz LOCO oscillator.

This device belongs to the RX631 Group - distinguished from the RX63N Group by absence of Ethernet MAC, EDMAC, and SDRAM controller. It supports up to 11 SCI channels (including LIN-capable SCId), 4 I²C interfaces (one FM+), 3 CAN channels (32 mailboxes each), and parallel data capture (PDC) only in packages ≥144 pins - confirmed for its 145-pin TFLGA package (PTLG0145KA-A).

Key Specifications

Pinout & Package

Package: 145-pin TFLGA (PTLG0145KA-A), 7 mm × 7 mm, 0.5 mm pitch, 0.8 mm height - compact footprint optimized for space-constrained industrial PCBs with high I/O density.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with R5F5631BDDLK#U0, R5F563NBDDBG adds Ethernet and SDRAM support at the cost of larger package and higher power, while R5F566TEBDFP trades security and mixed-signal integration for raw CPU speed and motor-control-specific peripherals - making each suitable for distinct architecture tiers.

Availability

R5F5631BDDLK#U0 is available at Aetrix Electronics and suitable for industrial motor control, smart energy metering, building automation, and factory I/O modules requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.

Supply support for R5F5631BDDLK#U0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and IoT markets.

The RX631 Group is engineered for cost-optimized, high-integrity embedded control - emphasizing real-time determinism, functional safety (IEC60730), and rich analog/motor-control peripherals without Ethernet overhead.

FAQ

What is the maximum operating frequency and CPU performance of the R5F5631BDDLK#U0?

The R5F5631BDDLK#U0 operates at a maximum frequency of 100 MHz and delivers 165 DMIPS of processing performance using the 32-bit RXv1 CPU core. Its single-cycle 32×32-bit multiplier and hardware IEEE-754 floating-point unit enable efficient execution of control algorithms, making the R5F5631BDDLK#U0 well-suited for real-time industrial applications requiring deterministic timing and mathematical precision.

Does the R5F5631BDDLK#U0 include an Ethernet controller?

No, the R5F5631BDDLK#U0 belongs to the RX631 Group, which explicitly excludes the Ethernet MAC, EDMAC, and SDRAM controller found in the RX63N Group. This distinction is confirmed in Renesas documentation (R01DS0098EJ0180), where Table 1.2 shows "Not available" for Ethernet controller in all RX631 packages - including the 145-pin TFLGA variant of the R5F5631BDDLK#U0.

What package type and pin count does the R5F5631BDDLK#U0 use?

The R5F5631BDDLK#U0 uses a 145-pin TFLGA package (PTLG0145KA-A), measuring 7 mm × 7 mm with 0.5 mm pitch. This land-grid array package provides high I/O density and thermal performance for compact industrial PCBs, and supports 111 general-purpose I/O pins with 5-V tolerance on 18 pins - as verified in Table 1.2 of the RX63N/RX631 Group datasheet.

How much on-chip memory does the R5F5631BDDLK#U0 integrate?

The R5F5631BDDLK#U0 integrates 1 MB of on-chip flash memory (zero-wait-state at 100 MHz), 128 KB of SRAM, and 32 KB of reprogrammable data flash (rated for 100,000 erase/write cycles). These memory resources are confirmed in Table 1.3 of the official datasheet (R01DS0098EJ0180) under the RX631 Group listing for part number R5F5631BDDLK.

Is the R5F5631BDDLK#U0 qualified for functional safety standards?

Yes, the R5F5631BDDLK#U0 includes hardware features aligned with IEC60730 Class B requirements: oscillation-stop detection, CRC calculator (with three selectable polynomials), self-diagnostic A/D converter, independent watchdog timer (IWDT) with dedicated LOCO clock, and memory protection unit (MPU). These capabilities - documented in the "Useful functions for IEC60730 compliance" section - support certification of appliances and industrial equipment using the R5F5631BDDLK#U0 as the safety-related control element.