瑞萨发布 RX74M 与 RX74N 旗舰微控制器：RX 家族首用 22 纳米工艺与嵌入式 MRAM
东京——瑞萨电子 10 月 22 日发布两款旗舰 32 位微控制器 RX74M 与 RX74N：最高主频 600 MHz，是 RX 家族中首批采用 22 纳米工艺并集成嵌入式 MRAM（磁阻式随机存取存储器）的产品，性能为 240 MHz 前代产品 RX72M 与 RX72N 的两倍以上。两款产品即日起供货。
两款芯片集成 600 MHz 的 RXv3e 内核、1MB MRAM、256KB 零等待紧密耦合存储器（TCM）与 1.5MB SRAM。瑞萨表示，与传统嵌入式闪存不同，MRAM 写入数据前无需擦除，可实现更快的代码与数据更新、更短的编程时间与更少的系统停机，适合频繁存储参数与日志的应用。
定位上，RX74M 面向工业与工厂自动化设备，如交流驱动器、工业机器人与可编程逻辑控制器（PLC）；RX74N 面向智能电表、功率调节器与暖通空调（HVAC）等工业设备。RX74M 在单芯片上集成 EtherCAT 从站控制器、支持时间敏感网络（TSN）的千兆以太网交换机与 CAN FD，可在一颗芯片上支持 EtherCAT、PROFINET、EtherNet/IP 等主要工业网络及确定性通信，并支持此前世代未支持的 EtherNet/IP DLR 冗余环网配置。
安全方面，两款产品在 RX CPU 中引入 ProtectZone，可在单芯片内分隔安全与非安全区域；新一代瑞萨安全 IP（RSIP）把公钥密码扩展至认证加密与更多哈希算法，并支持后量子密码（PQC），以应对欧盟《网络弹性法案》（CRA）等法规要求。瑞萨嵌入式处理高级 MCU 事业部高级总监 Yoshi Ishikawa 表示，工业设备开发需要先进的实时性能、多样的工业网络与稳健的安全三项要素，新产品把三者集成于单芯片，简化日益复杂的工业设备设计。
此外，同系列还有主频 300 MHz、功耗低逾 20% 的版本；封装涵盖 176/224/320 引脚 LFBGA 与 100/144/176 引脚 LFQFP，供电电压 1.62 伏至 3.6 伏，工作温度范围为结温 −40°C 至 +125°C。
瑞萨电子在 GSM《全球芯片公司排名榜》中居第 17 名（2025 年营收约 88 亿美元），是日本公司在主榜的最高名次；其微控制器业务居全球前五（Omdia，2025 年）。
Renesas Launches Flagship RX74M and RX74N Microcontrollers: First RX Devices Built on 22nm With Embedded MRAM
TOKYO — Renesas Electronics on October 22 launched the RX74M and RX74N, new flagship 32-bit microcontrollers delivering up to 600 MHz performance — the first devices in the RX family built on a 22nm process and incorporating embedded MRAM. Both deliver more than twice the performance of their 240 MHz predecessors, the RX72M and RX72N, and are available now.
The devices integrate a 600 MHz RXv3e core with 1 MB of MRAM (magnetoresistive RAM), 256 KB of zero-wait-state tightly coupled memory and 1.5 MB of SRAM. Unlike conventional embedded flash, Renesas said, MRAM can write data without first performing an erase operation, enabling faster code and data updates, shorter programming times and reduced system downtime for applications that frequently store parameters and logs or update data.
The RX74M is designed for industrial and factory automation equipment such as AC drives, industrial robots and programmable logic controllers, while the RX74N targets smart meters, power conditioners and HVAC systems. The RX74M integrates an EtherCAT slave controller, a TSN-capable Gigabit Ethernet switch and CAN FD on a single chip, supporting major industrial networks including EtherCAT, PROFINET and EtherNet/IP, deterministic communication via TSN, and redundant configurations such as EtherNet/IP DLR that previous generations did not support.
For security, both devices incorporate ProtectZone into the RX CPU to separate secure and non-secure regions within a single chip, and the next-generation Renesas Secure IP extends public-key cryptography to authenticated encryption and a broader range of hash algorithms, including post-quantum cryptography — features aimed at regulations such as the EU Cyber Resilience Act. "Industrial equipment development requires three key elements: advanced real-time performance, diverse industrial networking and robust security," said Yoshi Ishikawa, Senior Director of the EP Advanced MCU Business Division at Renesas. "By integrating these requirements into a single chip, the new products simplify the design of increasingly complex industrial equipment and support the evolution of industrial automation."
Renesas also offers 300 MHz versions with more than 20% lower power consumption, a package lineup spanning 176/224/320-pin LFBGA and 100/144/176-pin LFQFP, a supply range of 1.62 V to 3.6 V and an operating temperature range of −40°C to +125°C (Tj).
Renesas ranks No. 17 in GSM's Global Chip Company Rankings, with 2025 revenue of about $8.8 billion — the highest-placed Japanese company on the main list — and sits among the global top five in microcontrollers (Omdia, 2025).
来源：GSM·美国（原文链接）
图片来源：图：工厂自动化产线上的工业机器人（资料图，摄于特斯拉工厂）。照片：Steve Jurvetson，CC BY 2.0，经 Wikimedia Commons。Photo: Industrial robots on a factory automation line (file photo, at a Tesla factory). Photo: Steve Jurvetson, CC BY 2.0, via Wikimedia Commons.
