Renesas R7FA2E2A52DNJ#AA1

Overview

R7FA2E2A52DNJ#AA1 from Renesas Electronics is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 48 MHz, featuring 32-KB code flash, 8-KB SRAM, 12-bit ADC and DAC, integrated CAN interface, and hardware security including AES-128/256 and TRNG. It targets battery-powered industrial sensors and smart metering systems requiring functional safety and secure firmware updates.

For engineers reviewing the R7FA2E2A52DNJ#AA1 datasheet, R7FA2E2A52DNJ#AA1 pinout, R7FA2E2A52DNJ#AA1 application, or R7FA2E2A52DNJ#AA1 equivalent, key selection criteria include its 20-pin HWQFN package, -40°C to +85°C industrial temperature grade, 1.6–5.5 V wide supply range, dual watchdog timers (WDT/IWDT), and support for I3C, SPI, SCI, and CAN communication protocols.

Technical Context

The R7FA2E2A52DNJ#AA1 implements the Armv8-M architecture with Memory Protection Unit (MPU) supporting eight regions, enabling secure partitioning of firmware and data in resource-constrained embedded systems. Its clock system integrates HOCO (up to 48 MHz), MOCO (8 MHz), LOCO (32.768 kHz), and IWDT-dedicated oscillator (15 kHz), all with trim capability for precision timing across voltage and temperature.

System-level features include Event Link Controller (ELC) for CPU-free peripheral triggering, Data Transfer Controller (DTC) for autonomous memory transfers, and Clock Frequency Accuracy Measurement Circuit (CAC) for real-time oscillator calibration-critical for CAN bus synchronization and low-power RTC operation without external crystals.

Key Specifications

Pinout & Package

Package: 20-pin HWQFN (4 mm × 4 mm, 0.5 mm pitch), exposed die pad recommended connected to VSS or left floating. Pin count and I/O allocation match R7FA2E2A5xxNJ family specification: 15 general-purpose I/O pins, 2 dedicated analog reference pins (VREFH0/VREFL0), and 3 power/ground pins (VCC/VSS/VCL).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E2A52DNJ#AA1, the RA2E1 alternative sacrifices CAN and security acceleration for cost reduction, while the STM32G071 offers higher speed and flash but demands external CAN hardware and PCB rework-making R7FA2E2A52DNJ#AA1 optimal for compact, secure, CAN-connected edge devices.

Availability

R7FA2E2A52DNJ#AA1 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, BLDC motor controllers, and IoT edge gateways requiring stable component supply across automotive-grade temperature ranges and long product lifecycles.

Supply support for R7FA2E2A52DNJ#AA1 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 Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and SoC solutions for industrial, automotive, and infrastructure markets.

The RA2E2 Group is designed for ultra-low-power, cost-sensitive embedded applications demanding functional safety, hardware security, and rich analog/peripheral integration-targeting battery-operated sensors, smart meters, and industrial HMI.

FAQ

What is the maximum operating frequency and core architecture of the R7FA2E2A52DNJ#AA1?

The R7FA2E2A52DNJ#AA1 features an Arm Cortex-M23 core compliant with the Armv8-M architecture and operates at a maximum frequency of 48 MHz. This enables deterministic real-time execution with TrustZone security extensions, making it suitable for applications requiring both performance and hardware-enforced isolation between trusted and untrusted code domains within the R7FA2E2A52DNJ#AA1.

Does the R7FA2E2A52DNJ#AA1 include integrated CAN physical layer support?

No, the R7FA2E2A52DNJ#AA1 integrates a CAN controller module but requires an external CAN transceiver (e.g., TJA1042 or SN65HVD230) for physical layer signaling. The R7FA2E2A52DNJ#AA1 provides CAN protocol handling, message filtering, and error management in hardware, reducing CPU load and ensuring robust communication in electrically noisy industrial environments.

What analog peripherals are included in the R7FA2E2A52DNJ#AA1 and how are they configured?

The R7FA2E2A52DNJ#AA1 includes a 12-bit successive-approximation ADC12 with up to 7 input channels, a 12-bit DAC12, an on-die temperature sensor (TSN), and two low-power analog comparators (ACMPLP). These are configured via dedicated registers and can be triggered by hardware events (e.g., timer overflow or external pin) without CPU involvement, enabling precise sensor signal acquisition and closed-loop analog control within the R7FA2E2A52DNJ#AA1.

How does the R7FA2E2A52DNJ#AA1 support functional safety compliance?

The R7FA2E2A52DNJ#AA1 supports functional safety through ECC in SRAM, SRAM parity checking, flash area protection, ADC self-diagnosis, Clock Frequency Accuracy Measurement Circuit (CAC), CRC calculator, Data Operation Circuit (DOC), and independent watchdog timer (IWDT). These features collectively enable certification to IEC 61508 SIL2 and ISO 26262 ASIL-B standards when implemented per Renesas' safety manual-directly enhancing system reliability in the R7FA2E2A52DNJ#AA1.

What is the package type and thermal rating of the R7FA2E2A52DNJ#AA1?

The R7FA2E2A52DNJ#AA1 uses a 20-pin HWQFN package (4 mm × 4 mm, 0.5 mm pitch) with an exposed die pad, rated for industrial operation from -40°C to +85°C. Its compact footprint and thermal characteristics make it ideal for space-constrained designs such as smart meter modules and portable industrial sensors-ensuring stable operation of the R7FA2E2A52DNJ#AA1 under ambient temperature variations.