Maxim Integrated MAX3490ESA+T RS-485/RS-422 Transceiver

The MAX3490ESA+T is a high-performance, half-duplex transceiver from Maxim Integrated, designed to facilitate communication on RS-485 and RS-422 networks. This device is particularly well-suited for long-distance and high-speed data transmission applications where noise immunity and data integrity are crucial.

With a robust design, the MAX3490ESA+T operates over a wide temperature range of -40°C to +85°C, making it an ideal choice for demanding industrial environments. The transceiver features a low-power shutdown mode and an extended common-mode range, ensuring reliable operation even in the presence of electrical noise and ground potential differences.

The MAX3490ESA+T supports data rates up to 10Mbps and features true fail-safe receiver inputs, which guarantee a logic-high receiver output when the inputs are open or shorted, or when they are connected to a terminated transmission line with no data being transmitted. This feature enhances the reliability of the network by ensuring that the receiver is in a known state during fault conditions.

The device is available in an 8-pin NSOIC package, which provides a compact footprint for space-constrained applications. The MAX3490ESA+T also features thermal-shutdown protection and current-limiting circuitry to protect against output driver overload, further enhancing its robustness and reliability.

Key features of the MAX3490ESA+T include:

• Half-duplex RS-485 and RS-422 communication
• Operates from a single 5V supply
• Low quiescent current: 300µA (typical)
• Low-power shutdown mode: 1µA (typical)
• -7V to +12V common-mode input voltage range
• Thermal-shutdown protection
• Current-limiting for driver overload protection
• Pin-compatible with the industry-standard MAX3485 and MAX3488

Whether it's for industrial control systems, networked security systems, or any application requiring a robust and reliable data communication link, the MAX3490ESA+T offers the performance and features that designers need to build state-of-the-art communication systems.