Renesas R7FA2E2A74CBY#HC1

Overview

R7FA2E2A74CBY#HC1 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-256 and TRNG. It targets battery-powered industrial sensors and smart metering systems requiring functional safety and secure firmware updates.

For engineers reviewing the R7FA2E2A74CBY#HC1 datasheet, R7FA2E2A74CBY#HC1 pinout, R7FA2E2A74CBY#HC1 application, or R7FA2E2A74CBY#HC1 equivalent, key selection criteria include its WLCSP-16 package with 11 GPIOs, -40°C to +125°C extended temperature rating, integrated I3C/SCI/SPI interfaces, and ECC-protected SRAM for ASIL-B–capable designs.

Technical Context

The R7FA2E2A74CBY#HC1 implements the Armv8-M architecture with Memory Protection Unit (MPU) supporting eight regions, enabling memory isolation for RTOS-based applications. Its dual watchdog system includes a standard WDT and independent IWDT with dedicated 15 kHz oscillator, ensuring fail-safe recovery in safety-critical operation.

System-level timing control is handled by the Event Link Controller (ELC), which enables direct peripheral-to-peripheral triggering without CPU intervention, and the Data Transfer Controller (DTC) supports autonomous data movement for low-power sensor data acquisition. The Clock Frequency Accuracy Measurement Circuit (CAC) provides real-time clock calibration against external references.

Key Specifications

Pinout & Package

Package: 16-pin WLCSP (1.84 mm × 1.87 mm, 0.4 mm pitch), exposed die pad recommended to be connected to VSS. Designed for space-constrained PCB layouts in portable and embedded edge devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2E2A74CBY#HC1, the R7FA2E1A74CBY#HC1 offers reduced memory and no CAN but matches pinout and thermal specs, while the R7FA2L1A74CBY#HC1 trades hardware security and advanced peripherals for lower unit cost in non-safety-critical roles.

Availability

R7FA2E2A74CBY#HC1 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, motor control interfaces, and secure edge gateways requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for R7FA2E2A74CBY#HC1 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 specifically for ultra-low-power, cost-sensitive industrial and consumer applications requiring robust security, functional safety features, and scalable software compatibility across the RA family.

FAQ

What is the maximum operating frequency of the R7FA2E2A74CBY#HC1?

The R7FA2E2A74CBY#HC1 operates at a maximum frequency of 48 MHz using the Arm Cortex-M23 core. This speed is achievable with the high-speed on-chip oscillator (HOCO) configured at 48 MHz or via external crystal input. The device maintains full peripheral functionality-including ADC sampling, CAN bit timing, and PWM resolution-at this clock rate, as verified in the R01DS0387EJ0150 datasheet section 2.2.1.

Does the R7FA2E2A74CBY#HC1 support CAN FD or only classical CAN 2.0B?

The R7FA2E2A74CBY#HC1 supports only classical CAN 2.0B, not CAN FD. Its CAN module complies with ISO 11898-1:2015 for data rates up to 1 Mbps and includes message objects, acceptance filtering, and loopback self-test modes. CAN FD frame format, higher data phase speeds, and extended ID handling are not implemented in this RA2E2 variant per the R01DS0387EJ0150 datasheet section 1.7 and Table 1.7.

What is the purpose of the VCL pin on the R7FA2E2A74CBY#HC1?

The VCL pin on the R7FA2E2A74CBY#HC1 connects to the internal analog LDO's stabilization capacitor-specifically a 4.7 µF ceramic capacitor tied to VSS. This capacitor suppresses switching noise and ensures stable internal voltage for the ADC, DAC, and temperature sensor. Omitting or undersizing this capacitor degrades analog performance and may cause intermittent conversion errors, as specified in Section 2.1 of the R01DS0387EJ0150 datasheet.

How many general-purpose I/O pins does the R7FA2E2A74CBY#HC1 provide in its WLCSP-16 package?

The R7FA2E2A74CBY#HC1 in the WLCSP-16 package provides 11 general-purpose I/O pins (P010, P011, P014, P015, P100–P103, P108–P112, P200, P201, P300, P400, P401), confirmed in Table 1.14 of the R01DS0387EJ0150 datasheet. All support 5-V tolerance (P400/P401 only), pull-up resistors, and open-drain outputs on 11 pins-enabling direct interface with legacy 5 V logic without level shifters.

Is the R7FA2E2A74CBY#HC1 qualified for automotive AEC-Q100 standards?

No, the R7FA2E2A74CBY#HC1 is not AEC-Q100 qualified. It is rated for industrial temperature range (-40°C to +125°C) and intended for industrial, consumer, and infrastructure applications. While it includes safety features like ECC SRAM, IWDT, and CAC, it lacks the stress testing, failure analysis, and qualification documentation required for automotive use. Renesas offers AEC-Q100–qualified RA4/RA6 series parts for automotive applications.