Nations Technologies Unveils N32H493: Purpose-Built MCU for 800G/1.6T Optical Modules
Nations Technologies has officially launched the N32H493 series, a high-performance MCU purpose-built for 800G and 1.6T optical modules, marking a significant breakthrough for domestic MCUs in high-bandwidth optical communication. Featuring rich interfaces and high reliability, the chip delivers core control solutions for AI data center optical interconnects.
AI Data Centers Drive Optical Module Upgrade Wave
With the explosive growth of large language models such as ChatGPT and DeepSeek, global AI data center construction has entered an unprecedented acceleration phase. Demand for optical interconnect bandwidth within data centers is growing exponentially—800G optical modules have already become standard equipment for new data centers, while commercialization of 1.6T modules is rapidly advancing. In this landscape, the MCU controller inside each optical module—responsible for critical functions including digital diagnostics, temperature compensation, and linear equalization—directly determines overall module quality through its performance and reliability.
For years, the optical module MCU market has been dominated by international vendors, creating an urgent need for domestic alternatives. In April 2026, Nations Technologies delivered its answer with the official launch of the N32H493 series.
Core Technical Features of N32H493
Built on the ARM Cortex-M4F core running at up to 240MHz, the N32H493 integrates a rich set of high-speed communication interfaces optimized for optical module applications:
- Dual I2C Fast-mode Plus (1MHz): meeting high-bandwidth multi-channel management needs of QSFP-DD/OSFP form factors
- Multi-channel high-precision ADC: enabling real-time monitoring of temperature, voltage, bias current, and transmit/receive optical power
- Hardware-accelerated DAC: flexible bias current and modulation voltage configuration for different laser driver vendors
- 512KB Flash + 128KB SRAM: ample capacity for complex calibration algorithms and real-time diagnostic firmware
- Built-in temperature sensor and hardware CRC: enhanced system reliability and data integrity
- -40℃ to 105℃ industrial temperature range: designed for demanding data center thermal environments
Additionally, N32H493 fully supports CMIS 5.x, enabling seamless integration with mainstream optical module management platforms and significantly reducing customer development and qualification cycles.
From Substitution to Leadership: A New Benchmark
Nations Technologies has accumulated deep MCU expertise over many years, with over 100 million cumulative N32-series shipments. The N32H493 extends this legacy while delivering two strategic advances:
First, capturing a critical node in AI infrastructure. 800G/1.6T optical modules form the connective "blood vessels" of AI data centers. By targeting this high-value segment directly, Nations Technologies significantly strengthens its position in infrastructure chip markets.
Second, demonstrating domestic MCU capability in high-end applications. Optical module MCUs demand far higher stability and precision than consumer-grade products. The N32H493 proves that domestic MCUs are now ready for high-end industrial and communications applications—directly relevant to the telecom equipment customers served by Hengsen Technology.
Hengsen Technology Perspective
As a key distribution partner of Nations Technologies, Hengsen Technology is closely tracking the N32H493's market progress. This product meaningfully strengthens our optical communications solution portfolio—we can support customers with one-stop offerings spanning MCU chips, development toolchains, and reference designs, enabling smooth migration from international to domestic solutions.
With global 800G optical module shipments projected to exceed 20 million units in 2026, we expect the N32H493 to capture a significant share of this rapidly growing market.
Sources: Nations Technologies, Sina Finance, Jiemian News, Securities Daily