Renesas R7FA2E1A73CNE#AA0

Overview

R7FA2E1A73CNE#AA0 from Renesas is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 48 MHz, featuring 64 KB code flash, 16 KB SRAM, a 12-bit ADC (ADC12), Capacitive Sensing Unit (CTSU2), and integrated security (AES128/256, TRNG). It targets battery-powered HMI, sensor nodes, and industrial control where low power, touch interface, and functional safety are critical.

For engineers reviewing the R7FA2E1A73CNE#AA0 datasheet, R7FA2E1A73CNE#AA0 pinout, R7FA2E1A73CNE#AA0 application, or R7FA2E1A73CNE#AA0 equivalent, key selection criteria include its 48-pin HWQFN package, -40°C to +85°C industrial temperature grade, CTSU2-based touch capability, dual watchdog timers (WDT/IWDT), and support for multiple clock sources including HOCO/MOCO/LOCO with trim.

Technical Context

The R7FA2E1A73CNE#AA0 implements the Armv8-M architecture with Memory Protection Unit (MPU) and CoreSight™ MTB-M23 trace, enabling secure, debuggable embedded applications. Its system-level features include Event Link Controller (ELC) for CPU-free peripheral coordination and Data Transfer Controller (DTC) for autonomous data movement triggered by interrupts.

Analog subsystem integration includes ADC12 with up to 13 input channels, two low-power analog comparators (ACMPLP), and on-die temperature sensor (TSN) - all accessible via shared I/O pins. The CTSU2 supports up to 20 touch channels with configurable charge transfer and noise immunity, optimized for robust capacitive button/slider implementation in noisy environments.

Key Specifications

Pinout & Package

Package: 48-pin HWQFN (7 mm × 7 mm, 0.5 mm pitch), exposed thermal pad recommended to connect to VSS or left floating. Pin count matches LQFP-48 variant but offers improved thermal performance and smaller footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E1A93CNE#AA0, the R7FA2E1A73CNE#AA0 trades flash capacity for cost-sensitive deployment, while versus STM32L412KBU6 it delivers superior HMI integration and certified safety features - making it optimal for touch-centric, safety-aware edge devices.

Availability

R7FA2E1A73CNE#AA0 is available at Aetrix Electronics and suitable for smart home thermostats, industrial sensor nodes, medical wearables, and appliance control panels requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for R7FA2E1A73CNE#AA0 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 deep expertise in microcontrollers, analog, and power management.

The RA2E1 Group is designed specifically for ultra-low-power, cost-sensitive general-purpose applications requiring rich analog integration, capacitive touch, and foundational security - targeting next-generation battery-operated and industrial edge devices.

FAQ

What is the maximum operating frequency and core architecture of the R7FA2E1A73CNE#AA0?

The R7FA2E1A73CNE#AA0 features an Arm Cortex-M23 core compliant with the Armv8-M architecture and operates at a maximum frequency of 48 MHz. It includes the Arm Memory Protection Unit (MPU) with eight configurable regions and supports TrustZone for secure firmware partitioning. This architecture enables deterministic real-time performance while maintaining energy efficiency for battery-powered applications.

Does the R7FA2E1A73CNE#AA0 support capacitive touch sensing, and how many channels are available?

Yes, the R7FA2E1A73CNE#AA0 integrates the Capacitive Sensing Unit version 2 (CTSU2) supporting up to 20 touch channels. These channels are distributed across GPIO pins including TS00–TS16-CFC and TS17–TS28-CFC, enabling robust self- and mutual-capacitance sensing with built-in noise suppression and auto-calibration - eliminating the need for external touch controller ICs in the R7FA2E1A73CNE#AA0 design.

What are the memory resources available on the R7FA2E1A73CNE#AA0?

The R7FA2E1A73CNE#AA0 provides 64 KB of code flash memory (rated for 100,000 program/erase cycles), 4 KB of data flash memory, and 16 KB of on-chip SRAM with parity error checking. The memory map supports secure boot, firmware updates, and runtime data logging - all within the single-chip R7FA2E1A73CNE#AA0 solution without requiring external memory components.

Which package type and pin count does the R7FA2E1A73CNE#AA0 use?

The R7FA2E1A73CNE#AA0 is packaged in a 48-pin HWQFN (Heat Sink Wettable Flank Quad Flat No-lead) measuring 7 mm × 7 mm with 0.5 mm pitch. This package includes an exposed thermal pad recommended to connect to VSS for enhanced thermal dissipation - offering superior power efficiency and board-space savings compared to equivalent LQFP variants of the R7FA2E1A73CNE#AA0.

What security and functional safety features are implemented in the R7FA2E1A73CNE#AA0?

The R7FA2E1A73CNE#AA0 includes AES128/256 hardware acceleration, True Random Number Generator (TRNG), SRAM parity checking, flash area protection, ADC self-diagnosis, Clock Frequency Accuracy Measurement Circuit (CAC), Cyclic Redundancy Check (CRC) calculator, and Independent Watchdog Timer (IWDT). These features collectively support IEC 61508 SIL2 and IEC 60730 Class B compliance in the R7FA2E1A73CNE#AA0 implementation.