In high-demand application scenarios such as industrial communication, automation control, and telecommunications infrastructure, stable, high-speed, and interference-resistant data transmission is a key issue. For a long time, the MAX series of RS-485/RS-422 transceivers have been widely adopted due to their reliability. Now, Shanghai Chenyu Electronics has launched a new series of CYI3488, CYI3490, and CYI3491 3.3V low-power transceivers, which, with strong ESD protection, higher transmission rates, and excellent performance stability, become ideal alternatives for domestic industrial-grade communication chips.
This series of products features comprehensive ESD protection capabilities, with all I/O ports supporting ±15kV Human Body Model (HBM), ±8kV IEC 61000-4-2 contact discharge, and ±15kV air discharge protection, exceeding standards to ensure stable operation in harsh electromagnetic environments. In terms of communication performance, CYI3490/3491 supports a maximum communication rate of 12Mbps, outperforming similar competing products at 10Mbps; while CYI3488, as a slew-rate limited device, can still achieve 1Mbps transmission rate and excels in suppressing electromagnetic interference (EMI) and reducing signal reflections, making it particularly suitable for high-noise environments. The full-duplex communication architecture ensures simultaneous data transmission and reception, making it very suitable for industrial control networks, smart meters, and remote monitoring systems with high real-time requirements.
This series of chips operates on a single power supply of 3.0V–3.6V, compatible with 5V logic levels, allowing seamless integration with various microcontroller and processor platforms, significantly enhancing system integration convenience. In terms of energy efficiency, the static current is as low as 0.5mA, and CYI3491 also features a shutdown mode, greatly optimizing power consumption, making it very suitable for battery-powered devices and portable applications. The products support an industrial-grade temperature range of -40℃ to +85℃, with some models offering military-grade options (-55℃ to +125℃), widely adapting to various extreme working environments. The application range of this series of chips covers industrial automation control systems, telecommunications infrastructure, smart meters and energy management, medical electronic devices, as well as rail transportation and security monitoring in several important fields.
Comparison with the MAX series:
Summary:
The CYI3488/3490/3491 series products not only match but even exceed international mainstream models in key performance indicators, but also excel in ESD protection, rate, temperature adaptability, and power consumption. As representatives of domestic high-performance transceivers, they can seamlessly replace MAX3488/3490/3491, significantly enhancing system reliability and reducing supply chain risks, making them very suitable for promoting domestic substitution in communication and industrial control projects.
CYI3488/3490 Simplified Schematic CYI3491 Simplified Schematic
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