Renesas R7FA2A1AB3CNF#AC0

Overview

R7FA2A1AB3CNF#AC0 from Renesas Electronics is an Arm Cortex-M23-based 32-bit microcontroller designed for low-power, cost-sensitive industrial and human-machine interface applications. It operates at up to 48 MHz, integrates 256 KB code flash, 32 KB SRAM, dual A/D converters (16-bit ADC16 and 24-bit SDADC24), and a Capacitive Touch Sensing Unit (CTSU) - enabling robust touch control in smart sensors and metering devices.

For engineers reviewing the R7FA2A1AB3CNF#AC0 datasheet, R7FA2A1AB3CNF#AC0 pinout, R7FA2A1AB3CNF#AC0 application, or R7FA2A1AB3CNF#AC0 equivalent, key selection considerations include its 40-pin QFN package with 22 I/O pins, USB 2.0 Full-Speed support with Battery Charging 1.2 compliance, CAN 2.0B interface, and integrated analog front-end with three operational amplifiers and dual DACs (12-bit + dual 8-bit).

Technical Context

The R7FA2A1AB3CNF#AC0 implements an Armv8-M architecture Cortex-M23 core with Memory Protection Unit (8 regions), debug via SW-DP, and dual watchdog timers (WDT + IWDT). Its system-level timing relies on multiple clock sources including HOCO (up to 48 MHz), SOSC (32.768 kHz), and clock accuracy monitoring via CAC.

Analog subsystem integration includes ADC16 (1.2 Msps, 17-channel single-ended/4-differential), SDADC24 (15.6 ksps, PGA-equipped), DAC12, dual DAC8, ACMPHS, dual ACMPLP, and three OPAMPs with configurable switches - all supported by dedicated AVCC0/AVSS0 power domains and independent calibration functions.

Key Specifications

Pinout & Package

Package: 40-pin QFN (PWQN0040KC-A / PWQN0040KD-A), 6 mm × 6 mm, 0.5 mm pitch, exposed thermal pad. Designed for automated assembly and thermal dissipation in space-constrained industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R7FA2A1AB3CNF#AC0, R7FA2A1AB3CNE offers expanded analog I/O in a larger QFN, while R7FA2A1AB3CFM delivers maximum peripheral count in LQFP - both retain identical core, memory, security, and USB/CAN functionality, making them scalable alternatives within the same software platform.

Availability

R7FA2A1AB3CNF#AC0 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, touch-enabled HMI panels, and BLDC motor control modules requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for R7FA2A1AB3CNF#AC0 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 applications - with over 40 years of microcontroller innovation.

The RA2A1 Group targets cost-sensitive, low-power industrial and HMI applications, emphasizing integrated analog peripherals, security foundations, and seamless scalability across pin- and software-compatible devices - exemplified by the R7FA2A1AB3CNF#AC0's balanced feature set in a compact QFN package.

FAQ

What is the maximum operating frequency of the R7FA2A1AB3CNF#AC0?

The R7FA2A1AB3CNF#AC0 features an Arm Cortex-M23 core with a maximum operating frequency of 48 MHz. This clock speed is achieved using the high-speed on-chip oscillator (HOCO) at 48 MHz under 2.4–5.5 V supply conditions. The device also supports multiple clock sources including SOSC (32.768 kHz) and LOCO for low-power timing, and the Clock Frequency Accuracy Measurement Circuit (CAC) validates oscillator stability in real time.

Does the R7FA2A1AB3CNF#AC0 support USB device functionality with battery charging?

Yes, the R7FA2A1AB3CNF#AC0 integrates a USB 2.0 Full-Speed (USBFS) module that operates exclusively in device mode and complies with USB Battery Charging Specification Revision 1.2. It includes an on-chip transceiver with internal 3.3-V LDO regulator powered from VCC_USB_LDO, enabling direct connection to standard USB ports for both data transfer and charging negotiation without external components.

How many analog-to-digital converter channels does the R7FA2A1AB3CNF#AC0 provide?

The R7FA2A1AB3CNF#AC0 integrates two independent ADC subsystems: the 16-bit ADC16 supports up to 17 single-ended or 4 differential input channels, while the 24-bit sigma-delta SDADC24 supports up to 10 single-ended or 5 differential channels - including 2 channels routed from internal OPAMP outputs. Both converters include on-chip calibration for gain/offset correction to maintain accuracy across voltage and temperature.

What is the package type and pin count of the R7FA2A1AB3CNF#AC0?

The R7FA2A1AB3CNF#AC0 is housed in a 40-pin QFN package (PWQN0040KC-A or PWQN0040KD-A), measuring 6 mm × 6 mm with 0.5 mm pitch and an exposed thermal pad. It provides 22 general-purpose I/O pins, 3 dedicated input-only pins, 20 pull-up resistors, 13 N-ch open-drain outputs, and 3 5-V tolerant pins - optimized for compact industrial PCB layouts requiring thermal efficiency and moderate I/O density.

Does the R7FA2A1AB3CNF#AC0 include hardware security features for firmware protection?

Yes, the R7FA2A1AB3CNF#AC0 includes multiple hardware security features: AES128/256 encryption engine, True Random Number Generator (TRNG), Flash area protection registers, SRAM ECC and parity error checking, register write protection, and illegal memory access detection. These capabilities support secure boot, encrypted firmware updates, and runtime integrity checks - meeting foundational requirements for IEC 62443-3-3 and UL 60730 Class B compliance in industrial applications.