Renesas R5F5631DCDLK#U0

Overview

R5F5631DCDLK#U0 from Renesas is a 100 MHz 32-bit RX631 Group microcontroller featuring a single-precision IEEE-754 FPU, 1.5 Mbytes of on-chip flash memory, 128 Kbytes of SRAM, and 32 Kbytes of data flash. It integrates 12-bit and 10-bit A/D converters (21 and 8 channels), dual 10-bit D/A outputs, Ethernet MAC (not present), USB 2.0 host/function, CAN, multiple SCI/RSPI/I²C interfaces, and operates from 2.7–3.6 V across –40 to +85°C. It targets industrial HMI, motor control gateways, and networked sensor nodes requiring deterministic real-time execution and IEC 60730 safety support.

For engineers reviewing the R5F5631DCDLK#U0 datasheet, R5F5631DCDLK#U0 pinout, R5F5631DCDLK#U0 application, or R5F5631DCDLK#U0 equivalent, this page delivers verified specifications, package mapping to PTLG0145KA-A (145-pin TFLGA), confirmed peripheral channel counts per Table 1.2, functional distinctions from RX63N (no Ethernet, no SDRAM controller), and two validated alternative parts for cost- or feature-adjusted designs.

Technical Context

The R5F5631DCDLK#U0 implements the RXv1 CPU core with Harvard architecture, 5-stage pipeline, and variable-length instructions enabling ultra-compact code density. It supports memory protection (MPU), JTAG/FINE debugging, and four low-power modes - sleep, all-module clock stop, software standby, and deep software standby - with RTC backup capability via dedicated VBATT supply.

Its peripheral set excludes Ethernet MAC, EDMAC, SDRAM controller, and sub-clock oscillator (standard/low-load), per RX631 Group definition in Table 1.2. It retains full USB 2.0 host/function/OTG (1 port each), three CAN channels (2 mailboxes each), 13 SCI channels (with LIN/Smart Card modes), four I²C interfaces (1 FM+), and parallel data capture (PDC) support only on packages ≥100 pins - confirmed absent in 145-pin TFLGA configuration.

Key Specifications

Pinout & Package

Package: PTLG0145KA-A - 145-pin Thin Fine-Pitch Land Grid Array, 7 mm × 7 mm body, 0.5 mm pitch, 0.75 mm height, RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631DCDLK#U0, the RX63N alternative adds critical networking and memory expansion capabilities at identical pin count, while the RX62T offers focused motor-control acceleration at reduced memory and peripheral scope - enabling trade-offs between connectivity breadth and domain-specific performance.

Availability

R5F5631DCDLK#U0 is available at Aetrix Electronics and suitable for industrial HMI, building automation controllers, medical sensor hubs, and energy metering nodes requiring stable component supply, long-term lifecycle assurance, and automotive-grade traceability.

Supply support for R5F5631DCDLK#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 designed for cost-optimized, real-time embedded applications demanding robust safety certification (IEC 60730), rich connectivity (USB/CAN/SCI), and deterministic control - without Ethernet or SDRAM overhead.

FAQ

What is the maximum operating frequency and core architecture of the R5F5631DCDLK#U0?

The R5F5631DCDLK#U0 operates at a maximum frequency of 100 MHz using the 32-bit RXv1 CPU core with Harvard architecture, 5-stage pipeline, and variable-length instruction set. It delivers 165 DMIPS and includes a single-precision IEEE-754 floating-point unit. This architecture enables deterministic real-time execution and ultra-compact code size, making the R5F5631DCDLK#U0 well-suited for applications requiring both computational efficiency and low memory footprint.

Does the R5F5631DCDLK#U0 include an Ethernet MAC controller?

No, the R5F5631DCDLK#U0 does not include an Ethernet MAC controller. As a member of the RX631 Group, it explicitly omits Ethernet, EDMAC, SDRAM controller, and sub-clock oscillator - distinguishing it from the RX63N Group. This omission reduces cost and complexity for applications that rely on USB, CAN, or serial interfaces instead of wired Ethernet. The R5F5631DCDLK#U0 retains full USB 2.0 host/function/OTG, three CAN channels, and 13 SCI interfaces for alternative connectivity.

What package type and pin count does the R5F5631DCDLK#U0 use?

The R5F5631DCDLK#U0 uses the PTLG0145KA-A package: a 145-pin Thin Fine-Pitch Land Grid Array with 7 mm × 7 mm body size and 0.5 mm pitch. This package provides 111 general-purpose I/O pins, 1 dedicated input pin, pull-up resistors on all I/Os, open-drain capability, and 5-V tolerance on 18 pins. Its compact footprint supports high-density PCB layouts while maintaining signal integrity for mixed-signal operation.

How much on-chip memory does the R5F5631DCDLK#U0 integrate?

The R5F5631DCDLK#U0 integrates 1.5 Mbytes of on-chip flash memory (executed at 100 MHz with zero wait states), 128 Kbytes of SRAM (also zero-wait-state), and 32 Kbytes of reprogrammable data flash rated for 100,000 erase/write cycles. The flash supports on-board programming via SWD or FINE interface, and the data flash enables reliable parameter storage and firmware update staging - essential for field-deployed R5F5631DCDLK#U0 applications requiring robust data retention.

Which safety standards does the R5F5631DCDLK#U0 support for functional safety certification?

The R5F5631DCDLK#U0 includes hardware features aligned with IEC 60730 Class B requirements: oscillation-stop detection, built-in CRC calculator (with three configurable polynomials), self-diagnostic A/D converter, independent watchdog timer (IWDT) with dedicated LOCO clock, and register write protection. These capabilities allow developers to implement certified safety routines without external components - a key advantage for R5F5631DCDLK#U0 deployments in industrial controls, medical peripherals, and home appliances requiring regulatory compliance.