Renesas R5F5631ACDBG#G0

Overview

R5F5631ACDBG#G0 from Renesas is a 100 MHz 32-bit RX631 Group microcontroller with 768 KB on-chip flash, 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, Ethernet MAC (not present in RX631), USB 2.0 function controller, CAN, multiple SCI/I²C/SPI interfaces, and AES encryption. It targets industrial control and networked embedded systems requiring deterministic real-time performance and secure firmware updates.

For engineers reviewing the R5F5631ACDBG#G0 datasheet, R5F5631ACDBG#G0 pinout, R5F5631ACDBG#G0 application, or R5F5631ACDBG#G0 equivalent, key selection criteria include its 768 KB flash capacity, 128 KB SRAM, LFBGA-176 package (PLBG0176GA-A), -40°C to +105°C operating range (G version), and absence of Ethernet MAC - distinguishing it from RX63N variants.

Technical Context

The R5F5631ACDBG#G0 implements the 32-bit RX CPU core with Harvard architecture, 5-stage pipeline, and IEEE-754 single-precision FPU delivering 165 DMIPS at 100 MHz. It supports memory protection (MPU), JTAG/FINE debugging, and four low-power modes including deep software standby with SRAM retention.

Its peripheral set includes three CAN modules (32 mailboxes each), up to 13 SCI channels (with LIN/Smart Card modes), four I²C interfaces (one FM+), three RSPI channels, and a parallel data capture unit (PDC) - all synchronized to programmable PCLK up to 50 MHz, while flash operates at full 100 MHz with zero wait states.

Key Specifications

Pinout & Package

Package: PLBG0176GA-A - 176-pin Low-Profile Fine-Pitch Ball Grid Array (LFBGA), 13 mm × 13 mm, 0.8 mm pitch, RoHS-compliant, lead-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F563NACDBG#G0, the R5F5631ACDBG#G0 omits Ethernet hardware - reducing power, cost, and PCB routing complexity - while retaining identical flash/SRAM, peripherals, and security features. Versus R5F566TAADFP#30, it offers larger memory and LFBGA packaging but lower CPU speed and less advanced motor control timers.

Availability

R5F5631ACDBG#G0 is available at Aetrix Electronics and suitable for industrial automation, secure IoT gateways, HVAC control systems, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R5F5631ACDBG#G0 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 enterprise applications.

The RX631 Group is designed for cost-optimized, high-integration industrial control applications demanding real-time responsiveness, functional safety support (IEC 60730), and secure firmware execution - without requiring Ethernet connectivity.

FAQ

What is the maximum operating frequency and core architecture of the R5F5631ACDBG#G0?

The R5F5631ACDBG#G0 operates at a maximum frequency of 100 MHz using the 32-bit RX CPU core with Harvard architecture, 5-stage pipeline, and single-precision IEEE-754 floating-point unit. It delivers 165 DMIPS performance and supports variable-length instructions for ultra-compact code density. The core includes a memory protection unit (MPU) and JTAG/FINE debug interfaces. This architecture enables deterministic real-time behavior essential for industrial control loops.

Does the R5F5631ACDBG#G0 include an Ethernet MAC controller?

No, the R5F5631ACDBG#G0 does not include an Ethernet MAC controller. It belongs to the RX631 Group, which explicitly excludes Ethernet functionality - unlike the RX63N Group. This omission reduces silicon area, power consumption, and PCB routing complexity. If Ethernet connectivity is required, the pin-compatible R5F563NACDBG#G0 (same package, 768 KB flash) should be selected instead, as it integrates a full IEEE 802.3-compliant Ethernet controller with MII/RMII support.

What are the memory resources available on the R5F5631ACDBG#G0?

The R5F5631ACDBG#G0 integrates 768 KB of on-chip flash memory (zero-wait-state at 100 MHz), 128 KB of SRAM (zero-wait-state, with deep software standby retention), and 32 KB of reprogrammable data flash (rated for 100,000 erase/write cycles). Flash supports on-board programming via SWD or FINE interface, and the data flash enables background operation (BGO) for EEPROM-like parameter storage without halting CPU execution - critical for field-upgradable industrial firmware.

How does the R5F5631ACDBG#G0 support functional safety standards like IEC 60730?

The R5F5631ACDBG#G0 includes hardware features required for Class B IEC 60730 compliance: oscillation-stop detection for main/sub clocks, built-in CRC calculator (with three polynomials), independent watchdog timer (IWDT) with dedicated LOCO clock, self-diagnostic capability for the 10-bit A/D converter, and frequency measurement circuits for clock monitoring. These features enable runtime integrity checks without software overhead, allowing certified appliance designs to meet fault-detection coverage requirements without external safety monitors.

What is the operating temperature range and package type of the R5F5631ACDBG#G0?

The R5F5631ACDBG#G0 is a G-version device rated for -40°C to +105°C operation and packaged in a 176-ball LFBGA (PLBG0176GA-A) with 13 mm × 13 mm footprint and 0.8 mm pitch. This extended temperature grade and fine-pitch BGA package make it suitable for enclosed industrial environments and thermally constrained applications. The package supports automated optical inspection (AOI) and provides superior thermal dissipation compared to QFP alternatives, ensuring reliability under sustained 100 MHz operation.