Renesas R5F5631BDDFC#V0

Overview

R5F5631BDDFC#V0 from Renesas is a 100 MHz 32-bit RX CPU-based microcontroller in the RX631 Group, featuring 1 MB on-chip flash memory, 128 KB SRAM, and 32 KB data flash. It integrates a 12-bit A/D converter (21 channels), 10-bit A/D converter (8 channels), dual 10-bit D/A converters, RTC, USB 2.0 function controller, CAN, multiple SCI/UART interfaces, and I²C bus interfaces - designed for industrial control and embedded HMI applications requiring deterministic real-time performance and functional safety support.

For engineers reviewing the R5F5631BDDFC#V0 datasheet, R5F5631BDDFC#V0 pinout, R5F5631BDDFC#V0 application, or R5F5631BDDFC#V0 equivalent, this page delivers verified specifications, package mapping to PLQP0176KB-A (176-pin LQFP), confirmed peripheral channel counts per package, IEEE 754 FPU capability, IEC60730-compliant self-test features, and validated alternative MCU options for migration or second sourcing.

Technical Context

The R5F5631BDDFC#V0 implements the RXv1 CPU core with Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code density. It supports single-precision IEEE-754 floating-point operations and includes two multiply-and-accumulate units - one optimized for register-to-register and another for memory-to-memory computation.

Its clock system combines an external crystal oscillator (4–16 MHz) with internal PLL, LOCO (125 kHz), and HOCO (50 MHz) sources, allowing independent frequency division for ICLK (up to 100 MHz), PCLK (up to 50 MHz), FCLK (up to 50 MHz), and BCLK (up to 50 MHz). The device lacks Ethernet MAC and SDRAM controller - distinguishing it from RX63N variants and confirming its RX631 Group identity.

Key Specifications

Pinout & Package

Package: PLQP0176KB-A - 176-pin LQFP, 24 mm × 24 mm, 0.5 mm pitch, RoHS-compliant, surface-mountable with standard reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631BDDFC#V0, R5F563NBDDBG adds Ethernet and SDRAM support at the cost of increased pin count and layout complexity, while R5F566TADDFP trades communication peripherals for deterministic motor control acceleration - making each suitable only for distinct system-level requirements.

Availability

R5F5631BDDFC#V0 is available at Aetrix Electronics and suitable for industrial PLC modules, building automation controllers, medical infusion pumps, and smart energy meters requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for R5F5631BDDFC#V0 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 automotive, industrial, and IoT markets.

The RX631 Group is engineered for cost-optimized industrial control applications demanding real-time determinism, functional safety support (IEC60730), and rich analog/mixed-signal integration - without Ethernet or SDRAM overhead.

FAQ

What is the maximum operating frequency and CPU performance of the R5F5631BDDFC#V0?

The R5F5631BDDFC#V0 operates at a maximum frequency of 100 MHz and delivers 165 DMIPS of processing performance using the RXv1 32-bit CPU core. Its single-precision IEEE-754 floating-point unit and dual MAC units enable efficient execution of control algorithms, filtering, and sensor fusion tasks without external coprocessors - a key advantage in space-constrained industrial designs where R5F5631BDDFC#V0 serves as the primary compute engine.

Does the R5F5631BDDFC#V0 include an Ethernet MAC or SDRAM controller?

No, the R5F5631BDDFC#V0 belongs to the RX631 Group and explicitly excludes Ethernet MAC and SDRAM controller functionality - features reserved for the RX63N Group. This distinction is confirmed in Table 1.2 of the official datasheet (R01DS0098EJ0180), which lists "Not available" for both Ethernet controller and SDRAM area controller in all RX631 packages. Engineers selecting R5F5631BDDFC#V0 must plan for external networking or memory expansion if those capabilities are required.

What are the flash and RAM capacities of the R5F5631BDDFC#V0?

The R5F5631BDDFC#V0 integrates 1 MB of on-chip main flash memory and 128 KB of on-chip SRAM, both operating at zero wait states up to 100 MHz. It also includes 32 KB of reprogrammable data flash rated for 100,000 erase/write cycles. These capacities are fixed for this specific part number and align with the "1 Mbyte" ROM and "128 Kbytes" RAM entries in Table 1.3 of the RX63N/RX631 datasheet - making R5F5631BDDFC#V0 suitable for mid-complexity firmware with real-time OS, communication stacks, and control logic.

Which package type does the R5F5631BDDFC#V0 use, and what are its mechanical dimensions?

The R5F5631BDDFC#V0 uses the PLQP0176KB-A package: a 176-pin LQFP with 24 mm × 24 mm body size and 0.5 mm pin pitch. This package provides 133 general-purpose I/O pins, 18 of which are 5-V tolerant, and supports standard surface-mount assembly processes. The "#V0" suffix denotes tape-and-reel packaging per JEDEC standards - critical for automated manufacturing of R5F5631BDDFC#V0-based boards in high-volume production.

Is the R5F5631BDDFC#V0 suitable for IEC 60730 Class B safety-certified applications?

Yes, the R5F5631BDDFC#V0 includes hardware features required for IEC 60730 Class B compliance: oscillation-stop detection, frequency measurement circuitry, CRC calculator, independent watchdog timer (IWDT), and self-diagnostic capability for the 10-bit A/D converter. These are documented in the "Useful functions for IEC60730 compliance" section of the datasheet. When implemented with appropriate software routines, R5F5631BDDFC#V0 forms the foundation of certified safety firmware - reducing validation burden in white goods and industrial controls.