Renesas R5F521A7BDFN#30

Overview

R5F521A7BDFN#30 from Renesas Electronics is a 32-bit RX CPU-based microcontroller with 384 KB on-chip flash, 64 KB SRAM, and 8 KB data flash, operating at up to 50 MHz (78 DMIPS). It integrates a 24-bit ∆Σ A/D converter (7 channels, SNDR = 85 dB), 10-bit A/D (7 channels, 2.0 μs conversion), dual 10-bit D/A outputs, AES encryption (DEU), RTC with deep software standby wake-up, and IrDA support via SCI5 - deployed in industrial sensor signal conditioning and precision metering systems.

For engineers reviewing the R5F521A7BDFN#30 datasheet, R5F521A7BDFN#30 pinout, R5F521A7BDFN#30 application, or R5F521A7BDFN#30 equivalent, this page delivers verified technical context, package-validated pin functions, real-world use cases for high-resolution analog acquisition, and confirmed alternative parts for migration or sourcing flexibility.

Technical Context

The R5F521A7BDFN#30 implements the RXv1 CPU core with CISC Harvard architecture, 5-stage pipeline, and 64-bit accumulator for single-cycle 32×32-bit multiply-accumulate operations. Its memory protection unit (MPU) and on-chip debugging circuit support IEC60730-compliant functional safety designs.

It features dual-clock domain operation: system clock (ICLK) up to 50 MHz for CPU execution, and peripheral clock (PCLK) up to 25 MHz for timers, ADCs, and communication peripherals. The ELC enables direct event-triggered peripheral activation without CPU intervention, while MPC allows flexible I/O function assignment across multiple pins.

Key Specifications

Pinout & Package

Package: PLQP0080KB-A - 80-pin LQFP, 12 × 12 mm body, 0.5 mm pitch, exposed pad not specified, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with R5F521A7BDFN#30, R5F521A7BDFP#30 offers expanded I/O and peripheral channels in a larger package, while R5F521A6BDFN#30 provides identical functionality at lower memory capacity - enabling scalable product families without redesign.

Availability

R5F521A7BDFN#30 is available at Aetrix Electronics and suitable for industrial energy metering, precision sensor signal conditioning, smart grid monitoring, and portable medical instrumentation requiring stable component supply across extended lifecycle programs.

Supply support for R5F521A7BDFN#30 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 specializing in microcontrollers, analog, and power solutions for automotive, industrial, and IoT markets.

The RX21A Group targets high-precision analog-intensive applications, combining metrology-grade ∆Σ A/D converters with real-time processing and functional safety features for industrial and medical devices.

FAQ

What is the maximum operating frequency and associated performance of the R5F521A7BDFN#30?

The R5F521A7BDFN#30 operates at a maximum frequency of 50 MHz, delivering 78 DMIPS of processing performance. This speed is achievable under 2.7–3.6 V supply conditions; at 1.8–2.6 V, maximum frequency is derated to 25 MHz. The RXv1 core's 5-stage pipeline and single-cycle 32×32-bit multiply-accumulate capability ensure deterministic real-time execution for metrology and control tasks within the R5F521A7BDFN#30.

Does the R5F521A7BDFN#30 support hardware-accelerated cryptography?

Yes, the R5F521A7BDFN#30 includes a dedicated Data Encryption Unit (DEU) supporting AES-128, AES-192, and AES-256 encryption and decryption in ECB and CBC modes. This hardware accelerator offloads cryptographic operations from the CPU, enabling secure firmware updates and protected sensor data transmission without impacting real-time performance in the R5F521A7BDFN#30.

How many analog-to-digital converter channels does the R5F521A7BDFN#30 integrate, and what are their key distinctions?

The R5F521A7BDFN#30 integrates two independent A/D subsystems: a 24-bit ∆Σ A/D converter with 7 channels (4 differential, 3 single-ended) and an 85 dB SNDR, plus a 10-bit successive-approximation A/D converter with 7 channels and 2.0 μs conversion time. The ∆Σ unit targets high-resolution DC/low-frequency measurements (e.g., strain gauges), while the 10-bit unit serves faster control-loop sampling (e.g., motor current sensing) - both are accessible simultaneously in the R5F521A7BDFN#30.

What low-power modes are available on the R5F521A7BDFN#30, and which peripherals remain active during deep software standby?

The R5F521A7BDFN#30 supports four low-power modes, including deep software standby where CPU, flash, SRAM, and most peripherals are halted. During this mode, the RTC remains fully operational and can generate wake-up interrupts; the ∆Σ A/D and 10-bit A/D converters are disabled but can be reactivated within microseconds upon wake-up. This enables years-long battery life in metering and sensor nodes using the R5F521A7BDFN#30.

Is the R5F521A7BDFN#30 pin-compatible with other members of the RX21A Group?

The R5F521A7BDFN#30 uses the 80-pin LQFP package (PLQP0080KB-A) and shares identical pinout with other RX21A Group parts in that package, including R5F521A6BDFN#30 and R5F521A8BDFN#30. However, peripheral availability varies by memory configuration - for example, R5F521A6BDFN#30 omits some MTU2 channels and SCI instances despite identical pin mapping. Full functional compatibility requires matching memory grade and firmware validation for the R5F521A7BDFN#30.