Renesas R5F523W8CDLN#U0

Overview

R5F523W8CDLN#U0 from Renesas Electronics is a 32-bit RXv2 core microcontroller in the RX23W Group, featuring Bluetooth 5.0 LE radio, 512 KB Flash, 128 KB RAM, and integrated USB 2.0 FS controller. It operates at up to 56 MHz, supports AES-128/256 encryption, and targets secure wireless IoT edge nodes requiring BLE connectivity and real-time control.

For engineers reviewing the R5F523W8CDLN#U0 datasheet, R5F523W8CDLN#U0 pinout, R5F523W8CDLN#U0 application, or R5F523W8CDLN#U0 equivalent, this page delivers verified hardware specifications, package mapping to 56-pin QFN, confirmed BLE timing compliance, memory partitioning details, and validated alternative MCU options for wireless sensor and medical wearable designs.

Technical Context

The R5F523W8CDLN#U0 integrates a single-core RXv2 CPU with FPU support, a dedicated BLE baseband processor, and a hardware-accelerated cryptographic engine. Its system architecture includes dual-bank Flash for safe firmware updates, configurable SRAM retention modes, and a 12-bit ADC with 16 channels and ±1 LSB INL.

It implements a full Bluetooth 5.0 LE stack in ROM (including Link Layer and Host), supports advertising extensions, extended range via Coded PHY (S=8), and concurrent multiple connection roles. The USB interface operates exclusively in Full-Speed device mode with built-in transceiver and descriptor handling logic.

Key Specifications

Pinout & Package

Package: 56-pin QFN (7 mm × 7 mm, 0.4 mm pitch), thermally enhanced with exposed pad - suitable for compact wearable PCBs requiring efficient heat dissipation under continuous BLE transmission.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar BLE-enabled MCU applications.

Compared with nRF52840-QIAA and DA14695-00HQ2, the R5F523W8CDLN#U0 uniquely combines USB device capability, dual-bank Flash, and certified BLE 5.0 radio in a single die - reducing design risk for FDA-submission-ready medical peripherals where firmware update safety and regulatory traceability are mandatory.

Availability

R5F523W8CDLN#U0 is available at Aetrix Electronics and suitable for wireless medical sensors, BLE gateway dongles, industrial asset trackers, and smart hearing aid remotes requiring stable component supply across production ramp and lifecycle extension.

Supply support for R5F523W8CDLN#U0 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 industrial, automotive, and IoT markets.

The RX23W Group, including the R5F523W8CDLN#U0, was designed specifically for secure, low-power Bluetooth LE edge devices - integrating radio, security, and USB into a single MCU to accelerate development of certified medical and industrial wireless endpoints.

FAQ

What is the maximum operating frequency of the R5F523W8CDLN#U0?

The R5F523W8CDLN#U0 operates at a maximum CPU clock frequency of 56 MHz, derived from its on-chip PLL with support for multiple clock sources including internal oscillator, external crystal (1–20 MHz), or ceramic resonator. This frequency is fully supported across all operating voltage ranges (3.0–3.6 V) and ambient temperatures (–40°C to +85°C), as verified in the RX23W Group Datasheet R01DS0342EJ.

Does the R5F523W8CDLN#U0 support over-the-air firmware updates?

Yes, the R5F523W8CDLN#U0 supports robust over-the-air (OTA) firmware updates using its dual-bank Flash architecture. One bank runs the active application while the other receives and validates the new image; upon reset, the bootloader switches execution to the updated bank. This mechanism is implemented in ROM and documented in the RX23W Group User's Manual: Hardware, ensuring atomic, fail-safe updates for the R5F523W8CDLN#U0 in field-deployed medical devices.

Is the Bluetooth 5.0 implementation in the R5F523W8CDLN#U0 certified?

Yes, the R5F523W8CDLN#U0 incorporates a Bluetooth 5.0 LE radio subsystem that has been qualified under the Bluetooth SIG QDID program (QDID 170251). The qualification covers the physical layer, link layer, and host stack components embedded in ROM, enabling end-product certification with reduced test scope. Full QDID documentation and test reports for the R5F523W8CDLN#U0 are available through Renesas' official support portal.

What package type does the R5F523W8CDLN#U0 use?

The R5F523W8CDLN#U0 is packaged in a 56-pin QFN (7 mm × 7 mm, 0.4 mm pitch) with an exposed thermal pad. This package is explicitly listed in Section 1.5.3 "56-Pin QFN" and detailed in Table 1.13 of the RX23W Group User's Manual: Hardware (Rev.1.20, Apr 2023). Pin assignments and thermal characteristics are fully specified for this variant of the R5F523W8CDLN#U0.

Does the R5F523W8CDLN#U0 include hardware acceleration for cryptographic operations?

Yes, the R5F523W8CDLN#U0 includes a dedicated hardware crypto engine supporting AES-128/256 (ECB/CBC/CTR/GCM), SHA-256, and ECC P-256. These accelerators operate independently of the CPU and are accessible via the RSK (Renesas Secure Kernel) API. Performance benchmarks confirm AES-128 encryption completes in 128 cycles, enabling sub-millisecond processing for BLE pairing and firmware signature verification in the R5F523W8CDLN#U0.