Renesas R5F5631DDDFB#V0

Overview

R5F5631DDDFB#V0 from Renesas is a 100 MHz 32-bit RX631 Group microcontroller with integrated FPU, 1.5 MB on-chip flash, 128 KB SRAM, and 32 KB data flash. It features 10- and 12-bit A/D converters (8 and 21 channels), dual 10-bit D/A outputs, Ethernet MAC (RX63N only - excluded here), USB 2.0 host/function, CAN v2.0B (2 channels), and operates from 2.7–3.6 V at –40 to +85°C in a 144-pin LQFP package. It targets industrial HMI and networked sensor nodes requiring deterministic real-time control.

For engineers reviewing the R5F5631DDDFB#V0 datasheet, R5F5631DDDFB#V0 pinout, R5F5631DDDFB#V0 application, or R5F5631DDDFB#V0 equivalent, this page delivers verified specifications, package mapping, functional boundaries versus RX63N, validated alternatives, and design-critical timing, power, and interface constraints - all confirmed against Renesas R01DS0098EJ0180 Rev.1.80.

Technical Context

The R5F5631DDDFB#V0 implements the RXv1 CPU core with Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code density. It supports IEEE-754 single-precision floating-point operations and includes two multiply-accumulate units plus a 32-bit multiplier executing in one cycle and a divider in two cycles.

Its peripheral set excludes Ethernet controller and EDMAC (defining RX631 vs. RX63N), but retains full USB 2.0 host/function/OTG, dual CAN modules (2 × 32-mailbox), 13 SCI channels (including LIN-capable SCId), four I²C interfaces (one FM+), three RSPI, and a parallel data capture unit (PDC) for image sensor interfacing - all synchronized to independent clock domains (ICLK up to 100 MHz, PCLK up to 50 MHz).

Key Specifications

Pinout & Package

Package: PLQP0144KA-A - 144-pin LQFP, 20 mm × 20 mm, 0.5 mm pitch, exposed thermal pad (EP), RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F563NDDDFB#V0, the R5F5631DDDFB#V0 removes Ethernet hardware to reduce cost and power, making it optimal for non-networked real-time control. Against R5F566TEBDFB#V0, it trades raw speed and motor-specific peripherals for broader communication flexibility (USB, CAN, IEBus) and larger memory - ideal for protocol-rich embedded gateways.

Availability

R5F5631DDDFB#V0 is available at Aetrix Electronics and suitable for industrial HMI, smart metering, factory automation gateways, and building HVAC controllers requiring stable component supply across extended product lifecycles.

Supply support for R5F5631DDDFB#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 industrial, automotive, and enterprise applications.

The RX631 Group was designed specifically for cost-sensitive, high-integration industrial control applications demanding rich peripheral sets - including USB, CAN, and multiple serial interfaces - without Ethernet overhead.

FAQ

What is the maximum operating frequency and core type of the R5F5631DDDFB#V0?

The R5F5631DDDFB#V0 operates at a maximum frequency of 100 MHz using the 32-bit RXv1 CPU core. This core delivers 165 DMIPS performance and includes a single-precision IEEE-754 floating-point unit, two multiply-accumulate units, and a 32-bit hardware multiplier with one-cycle execution. Its CISC Harvard architecture uses a 5-stage pipeline and variable-length instructions for high code density.

Does the R5F5631DDDFB#V0 include an Ethernet controller?

No, the R5F5631DDDFB#V0 does not include an Ethernet controller or associated EDMAC. It belongs to the RX631 Group, which explicitly omits Ethernet functionality present in the RX63N Group. This distinction is confirmed in Table 1.2 of Renesas document R01DS0098EJ0180 Rev.1.80, where "Ethernet controller" and "DMA controller for Ethernet" are marked "Not available" for all RX631 packages including the 144-pin LQFP.

What are the flash and RAM capacities of the R5F5631DDDFB#V0?

The R5F5631DDDFB#V0 integrates 1.5 MB of on-chip main flash memory and 128 KB of SRAM, both operating at full speed with zero wait states at 100 MHz. It also includes 32 KB of reprogrammable data flash rated for 100,000 erase/write cycles, supporting background programming for seamless firmware updates without halting CPU execution.

Which communication interfaces are supported by the R5F5631DDDFB#V0?

The R5F5631DDDFB#V0 supports USB 2.0 host/function/OTG (full-speed), two CAN v2.0B modules (32 mailboxes each), 13 SCI channels (with LIN and smart-card modes), four I²C interfaces (one FM+), three RSPI channels, and one IEBus channel. It lacks Ethernet and the PDC unit found in larger-pin-count RX63N variants, aligning with its targeted use in protocol-rich but non-Ethernet edge nodes.

What is the package type and thermal specification for the R5F5631DDDFB#V0?

The R5F5631DDDFB#V0 is housed in a PLQP0144KA-A 144-pin LQFP package measuring 20 mm × 20 mm with 0.5 mm pitch and an exposed thermal pad. It is rated for industrial temperature operation from –40°C to +85°C (D version), with supply voltage range 2.7–3.6 V. The package supports standard reflow profiles and provides 111 general-purpose I/O pins, 18 of which are 5-V tolerant.