Renesas R5F5631ACDLK#U0

Overview

R5F5631ACDLK#U0 from Renesas is a 100 MHz, 32-bit RX CPU core microcontroller in the RX631 Group, featuring 768 KB 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 USB 2.0 function controller - designed for industrial control and embedded connectivity applications without Ethernet.

For engineers reviewing the R5F5631ACDLK#U0 datasheet, R5F5631ACDLK#U0 pinout, R5F5631ACDLK#U0 application, or R5F5631ACDLK#U0 equivalent, this device supports IEC60730 safety compliance, low-power operation down to 500 µA/MHz, and real-time peripheral control including CAN, SCI, I²C, RSPI, and programmable timers - critical for deterministic firmware execution in resource-constrained systems.

Technical Context

The R5F5631ACDLK#U0 implements the CISC Harvard-architecture RX CPU with 5-stage pipeline, single-cycle 32×32-bit multiply, two-cycle divide, IEEE-754 single-precision FPU, and memory protection unit (MPU). It operates at up to 100 MHz with 165 DMIPS performance and supports little-endian or big-endian data arrangement.

It integrates dedicated peripherals for functional safety: oscillation-stop detection, CRC calculator (X⁸+X²+X+1/X¹⁶+X¹⁵+X²+1/X¹⁶+X¹²+X⁵+1), self-diagnostic A/D converter, IWDT with 125-kHz LOCO clock, and register write protection - all aligned with IEC60730 Class B requirements.

Key Specifications

Pinout & Package

Package: 145-pin TFLGA (PTLG0145KA-A), 7 mm × 7 mm, 0.5-mm pitch, 111 general-purpose I/O pins (18 with 5-V tolerance), 1 input-only pin, pull-up resistors and open-drain capability on all I/Os.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F5631ACDLK#U0, R5F5631BDDLK#U0 offers headroom for firmware expansion while maintaining identical peripheral functionality, whereas R5F5630ADFP#U0 trades I/O count and interface flexibility for smaller footprint - making each alternative optimal under distinct mechanical and memory constraints.

Availability

R5F5631ACDLK#U0 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and medical sensor hub designs requiring stable component supply, long-term lifecycle support, and IEC60730-compliant silicon.

Supply support for R5F5631ACDLK#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 automotive, industrial, and IoT markets.

The RX631 Group targets cost-sensitive industrial and consumer applications needing high-performance 32-bit processing, functional safety features, and rich peripheral integration - without Ethernet MAC overhead.

FAQ

What is the maximum operating frequency and core performance of the R5F5631ACDLK#U0?

The R5F5631ACDLK#U0 operates at a maximum frequency of 100 MHz and delivers 165 DMIPS of processing performance using its 32-bit RX CPU core. Its single-cycle 32×32-bit multiplier and two-cycle divider enable efficient mathematical operations, while the IEEE-754-compliant FPU supports floating-point calculations essential for sensor fusion and control algorithms in the R5F5631ACDLK#U0.

Does the R5F5631ACDLK#U0 include Ethernet capability?

No, the R5F5631ACDLK#U0 belongs to the RX631 Group, which explicitly excludes the Ethernet MAC and EDMAC peripherals present in the RX63N Group. This makes the R5F5631ACDLK#U0 suitable for applications requiring USB, CAN, and serial interfaces without the complexity or power overhead of Ethernet - confirmed in Table 1.2 of the R01DS0098EJ0180 datasheet.

What safety features does the R5F5631ACDLK#U0 provide for IEC60730 compliance?

The R5F5631ACDLK#U0 integrates multiple hardware-level safety features required for IEC60730 Class B certification: oscillation-stop detection, CRC calculator with three polynomials, independent watchdog timer (IWDT) with dedicated LOCO clock, self-diagnostic A/D converter, and register write protection. These are documented in the "Useful functions for IEC60730 compliance" section of the R01DS0098EJ0180 datasheet and implemented directly in silicon for the R5F5631ACDLK#U0.

What package type and pin count does the R5F5631ACDLK#U0 use?

The R5F5631ACDLK#U0 uses a 145-pin TFLGA package (PTLG0145KA-A), measuring 7 mm × 7 mm with 0.5-mm pitch. It provides 111 general-purpose I/O pins, 18 of which are 5-V tolerant, plus dedicated power, clock, reset, and debug interface pins - matching the RX631 Group specification for 145-pin variants in Table 1.2 of the R01DS0098EJ0180 datasheet.

How much on-chip memory does the R5F5631ACDLK#U0 include?

The R5F5631ACDLK#U0 includes 768 KB of on-chip flash memory, 128 KB of SRAM, and 32 KB of reprogrammable data flash (rated for 100,000 erase/write cycles). Flash and SRAM both operate at zero wait states up to 100 MHz, ensuring deterministic execution and real-time data handling - as specified in Table 1.1 and confirmed for the "AC" variant in Table 1.3 of the R01DS0098EJ0180 datasheet.