Renesas R7FA2E2A74CNK#AA1

Overview

R7FA2E2A74CNK#AA1 from Renesas Electronics is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 48 MHz, featuring 64 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, smart metering endpoints, and automotive body electronics requiring functional safety support and extended temperature operation.

For engineers reviewing the R7FA2E2A74CNK#AA1 datasheet, R7FA2E2A74CNK#AA1 pinout, R7FA2E2A74CNK#AA1 application, or R7FA2E2A74CNK#AA1 equivalent, key selection criteria include its -40°C to +125°C operating range, HWQFN24 package with 19 GPIOs (2 × 5-V tolerant), dual watchdog timers (WDT/IWDT), ECC-protected SRAM, and I3C/SPI/SCI peripheral set for compact, safety-aware embedded control.

Technical Context

The R7FA2E2A74CNK#AA1 implements the Armv8-M architecture with Memory Protection Unit (MPU) supporting eight regions, enabling secure partitioning of firmware and data. Its clock system integrates HOCO/MOCO/LOCO oscillators with trim capability and a dedicated IWDT oscillator, allowing precise low-power timing and fail-safe reset generation independent of main clock stability.

Peripheral interconnect is managed via Event Link Controller (ELC) and Data Transfer Controller (DTC), enabling autonomous signal routing and memory transfers without CPU intervention. Safety features include CAC for clock accuracy monitoring, ADC self-diagnosis, SRAM parity/ECC checking, and register write protection - all aligned with IEC 61508 SIL2 and ISO 26262 ASIL-B readiness.

Key Specifications

Pinout & Package

Package: 24-pin HWQFN (4 mm × 4 mm, 0.5 mm pitch), exposed die pad (recommended connection to VSS). Operating temperature grade: Industrial (C) at -40°C to +125°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E2A74CNK#AA1, the R7FA2E1A74CNK#AA1 reduces system cost and layout area by removing CAN and shrinking package size, while the R7FA4M1AB3CFM#AA0 trades ultra-low-power operation and automotive temperature qualification for higher processing throughput and USB integration.

Availability

R7FA2E2A74CNK#AA1 is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body electronics, and smart energy metering applications requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R7FA2E2A74CNK#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 automotive, industrial, and IoT markets.

The RA2E2 group is designed for ultra-low-power, cost-optimized embedded control with integrated safety and security features - targeting battery-operated and thermally demanding applications where reliability and certification readiness are essential.

FAQ

What is the maximum operating frequency and core architecture of the R7FA2E2A74CNK#AA1?

The R7FA2E2A74CNK#AA1 features an Arm Cortex-M23 core compliant with the Armv8-M architecture and operates at a maximum frequency of 48 MHz. It includes an 8-region Memory Protection Unit (MPU), single-cycle integer multiplier, and debug support via SW-DP. This configuration delivers efficient deterministic performance for real-time control tasks while maintaining low power consumption in the R7FA2E2A74CNK#AA1.

Does the R7FA2E2A74CNK#AA1 support CAN communication, and what version is implemented?

Yes, the R7FA2E2A74CNK#AA1 integrates a CAN 2.0B-compliant module supporting both standard and extended frame formats, bit rates up to 1 Mbps, and loopback/self-test modes. The CAN peripheral is fully hardware-accelerated and shares no resources with other serial interfaces, ensuring deterministic latency for automotive and industrial network applications using the R7FA2E2A74CNK#AA1.

What are the supported operating temperature and voltage ranges for the R7FA2E2A74CNK#AA1?

The R7FA2E2A74CNK#AA1 is rated for operation from -40°C to +125°C and supports a supply voltage range of 1.6 V to 5.5 V on VCC. Its analog subsystem (ADC12, DAC12, TSN) remains fully specified across this full range, and the device includes Low Voltage Detection (LVD) with three configurable thresholds (LVD0/LVD1/LVD2) to ensure safe operation under brown-out conditions in the R7FA2E2A74CNK#AA1.

How does the R7FA2E2A74CNK#AA1 implement functional safety features?

The R7FA2E2A74CNK#AA1 includes multiple hardware-based safety mechanisms: SRAM with ECC or parity error detection, Clock Frequency Accuracy Measurement Circuit (CAC) for clock validation, ADC self-diagnosis, Independent Watchdog Timer (IWDT) with dedicated 15 kHz oscillator, and illegal memory access detection. These features collectively support development to IEC 61508 SIL2 and ISO 26262 ASIL-B requirements in the R7FA2E2A74CNK#AA1.

Which package type and pin count does the R7FA2E2A74CNK#AA1 use?

The R7FA2E2A74CNK#AA1 uses a 24-pin HWQFN package (4 mm × 4 mm, 0.5 mm pitch) with an exposed die pad recommended for connection to VSS. It provides 19 general-purpose I/O pins, including two 5-V tolerant inputs (P400/P401), and supports full peripheral functionality including CAN, I3C, and six GPT16 timers - all within this compact footprint for the R7FA2E2A74CNK#AA1.