Renesas R7FA2E2A52DNJ#HA0

Overview

R7FA2E2A52DNJ#HA0 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 memory, 8-KB SRAM with parity, a 12-bit ADC (8-channel), a 12-bit DAC, and integrated CAN, I3C, SPI, and SCI interfaces. It targets battery-powered industrial sensors, smart meters, and portable medical devices requiring functional safety and security.

For engineers reviewing the R7FA2E2A52DNJ#HA0 datasheet, R7FA2E2A52DNJ#HA0 pinout, R7FA2E2A52DNJ#HA0 application, or R7FA2E2A52DNJ#HA0 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, AES-128/256 encryption, and dual watchdog timers (WDT/IWDT) for fail-safe operation.

Technical Context

The R7FA2E2A52DNJ#HA0 implements the Armv8-M architecture with Memory Protection Unit (MPU) supporting eight regions, enabling secure partitioning of firmware and data. Its system-level timing relies on multiple independent clock sources - HOCO (48 MHz), MOCO (8 MHz), LOCO (32.768 kHz), and IWDT-dedicated 15-kHz oscillator - managed via Clock Frequency Accuracy Measurement Circuit (CAC) for real-time calibration.

Peripheral integration centers on event-driven autonomy: the Event Link Controller (ELC) enables direct hardware-to-hardware triggering between modules (e.g., ADC conversion start → DMA transfer), while the Data Transfer Controller (DTC) handles memory moves without CPU intervention. Safety is enforced through SRAM parity checking, flash area protection, ADC self-diagnosis, and register write protection (PRCR).

Key Specifications

Pinout & Package

Package: 20-pin HWQFN (4 mm × 4 mm, 0.5 mm pitch), exposed die pad recommended to be connected to VSS or left floating. Thermal resistance θ_JA = 42°C/W (JEDEC standard board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E1A52DNJ#HA0, the R7FA2E2A52DNJ#HA0 adds CAN and I3C for industrial networking and doubles ADC channels for multi-sensor systems; versus R7FA2E2A72DNJ#HA0, it trades 32 KB flash for lower unit cost while retaining identical safety, security, and analog capabilities.

Availability

R7FA2E2A52DNJ#HA0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, and portable medical monitors requiring stable component supply across extended product lifecycles.

Supply support for R7FA2E2A52DNJ#HA0 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 global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT markets, with over 40 years of MCU innovation.

The RA2E2 Group is designed for ultra-low-power, cost-sensitive applications demanding functional safety and security - targeting battery-operated sensors, smart meters, and portable medical devices where reliability and long-term supply are critical.

FAQ

What is the maximum operating frequency and core architecture of the R7FA2E2A52DNJ#HA0?

The R7FA2E2A52DNJ#HA0 features an Arm Cortex-M23 core compliant with the Armv8-M architecture and operates at a maximum frequency of 48 MHz. This core includes a Memory Protection Unit (MPU) with eight regions, single-cycle integer multiply, and 19-cycle integer divide. The R7FA2E2A52DNJ#HA0 uses this performance envelope to deliver deterministic real-time response in safety-critical applications while maintaining ultra-low power consumption.

Does the R7FA2E2A52DNJ#HA0 support CAN communication, and what version is implemented?

Yes, the R7FA2E2A52DNJ#HA0 integrates a CAN module compliant with the CAN 2.0B specification, supporting both standard (11-bit) and extended (29-bit) identifier frames at bit rates up to 1 Mbps. This capability is confirmed in the RA2E2 datasheet (R01DS0387EJ0150) Section 1.7 and enables direct connection to automotive and industrial CAN networks without external transceivers beyond physical layer interfacing.

What are the supported operating voltage and temperature ranges for the R7FA2E2A52DNJ#HA0?

The R7FA2E2A52DNJ#HA0 operates from 1.6 V to 5.5 V over an industrial temperature range of -40°C to +85°C. This wide voltage range allows direct compatibility with single-cell Li-ion, two-cell alkaline, or regulated 3.3 V/5 V supplies. The temperature rating is defined by the '2' suffix in the part number and validated per JEDEC JESD22-A104 stress testing standards.

How many analog input channels does the 12-bit ADC (ADC12) support on the R7FA2E2A52DNJ#HA0?

The R7FA2E2A52DNJ#HA0's 12-bit ADC12 supports eight analog input channels (AN005, AN006, AN009, AN010, AN019–AN022). This count is confirmed in Table 1.12 (Function Comparison) of the RA2E2 datasheet and applies specifically to the '5' flash variant (32 KB), distinguishing it from the 16-KB and 64-KB variants which offer four and eight channels respectively.

Is the R7FA2E2A52DNJ#HA0 pin-compatible with other members of the RA2E2 family?

Yes, the R7FA2E2A52DNJ#HA0 is fully pin-compatible with all 20-pin HWQFN variants in the RA2E2 family, including R7FA2E1A52DNJ#HA0 and R7FA2E2A72DNJ#HA0. Pin assignments, power domains, debug interfaces (SWDIO/SWCLK), and peripheral mappings (GPT, AGTW, SCI, etc.) are identical across these parts - enabling hardware reuse and firmware scalability within the same PCB layout.