Renesas R7FA2E1A52DFJ#AA0

Overview

R7FA2E1A52DFJ#AA0 from Renesas is an ultra-low-power 32-bit Arm® Cortex®-M23 microcontroller operating at up to 48 MHz, featuring 32-KB code flash, 16-KB SRAM, a 12-bit ADC (ADC12), Capacitive Sensing Unit (CTSU2), and integrated security with AES128/256 and 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 R7FA2E1A52DFJ#AA0 datasheet, R7FA2E1A52DFJ#AA0 pinout, R7FA2E1A52DFJ#AA0 application, or R7FA2E1A52DFJ#AA0 equivalent, key selection factors include its 32-pin LQFP package with 23 I/O pins, -40°C to +85°C industrial temperature grade, CTSU2-based touch sensing capability, and support for multiple low-power modes including RTC and AGT timers.

Technical Context

The R7FA2E1A52DFJ#AA0 implements the Armv8-M architecture with Memory Protection Unit (MPU) and CoreSight™ debug infrastructure. Its system-level timing relies on dual oscillators - main clock (1–20 MHz) and sub-clock (32.768 kHz) - plus four on-chip oscillators (HOCO/MOCO/LOCO/IWDT-Osc), enabling precise clock domain management for low-power operation.

Peripheral integration centers on event-driven autonomy: Event Link Controller (ELC) enables direct hardware-to-hardware triggering without CPU intervention, while Data Transfer Controller (DTC) offloads memory transfers during SCI/SPI/IIC activity. Safety features include SRAM parity checking, flash area protection, ADC self-diagnosis, and independent watchdog timer (IWDT) with dedicated 15-kHz oscillator.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch), RoHS-compliant Sn finish, industrial-grade (-40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E1A52DFL#AA0 and R7FA2E1A52DNH#AA0, the R7FA2E1A52DFJ#AA0 offers optimal balance of compact LQFP packaging, industrial temperature range, and integrated CTSU2 - making it ideal for cost-sensitive, volume HMI and sensor-edge applications where layout simplicity and manufacturability are prioritized.

Availability

R7FA2E1A52DFJ#AA0 is available at Aetrix Electronics and suitable for smart home thermostats, industrial sensor nodes, medical wearables, and asset tracking tags requiring stable component supply, long-term lifecycle assurance, and industrial-grade reliability.

Supply support for R7FA2E1A52DFJ#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 design innovation since 2010, with expertise in microcontrollers, analog, power, and connectivity solutions.

The RA2E1 Group, including R7FA2E1A52DFJ#AA0, was designed specifically for ultra-low-power, cost-sensitive industrial and consumer HMI and sensor-edge applications - emphasizing energy efficiency, integrated touch, security, and ease of certification.

FAQ

What is the maximum operating frequency of the R7FA2E1A52DFJ#AA0?

The R7FA2E1A52DFJ#AA0 features an Arm Cortex-M23 core with a maximum operating frequency of 48 MHz. This speed is achievable across the full industrial temperature range (-40°C to +85°C) and supply voltage (1.6–5.5 V), enabling real-time processing for sensor fusion and HMI tasks without external clock boosting.

Does the R7FA2E1A52DFJ#AA0 support capacitive touch sensing?

Yes, the R7FA2E1A52DFJ#AA0 integrates the Capacitive Sensing Unit version 2 (CTSU2), supporting up to 11 touch electrode pins. It includes hardware-based noise cancellation, automatic calibration, and low-power scanning modes - eliminating the need for external touch controller ICs in applications like appliance control panels and wearable interfaces.

What security features does the R7FA2E1A52DFJ#AA0 include?

The R7FA2E1A52DFJ#AA0 includes AES128/256 encryption acceleration, a True Random Number Generator (TRNG), flash area protection, SRAM parity checking, and register write protection. These features collectively support secure boot, encrypted firmware updates, and tamper-resistant data handling - meeting foundational requirements for IEC 62443 and ISO/SAE 21434 compliance.

How many analog input channels does the R7FA2E1A52DFJ#AA0 ADC support?

The R7FA2E1A52DFJ#AA0 integrates a 12-bit successive approximation ADC (ADC12) with 8 selectable analog input channels (AN000–AN007). These channels support internal references (VREFH0/VREFL0), temperature sensor output, and external signals - enabling simultaneous monitoring of battery voltage, thermistors, and other analog sensors.

What package type and pin count does the R7FA2E1A52DFJ#AA0 use?

The R7FA2E1A52DFJ#AA0 uses a 32-pin LQFP package (7 mm × 7 mm, 0.8 mm pitch) with 23 general-purpose I/O pins, 3 5-V-tolerant inputs, and 15 N-ch open-drain outputs. This package balances mechanical robustness, ease of inspection, and compatibility with standard SMT assembly processes.