MAX3490EESA+T

Overview

The MAX3490EESA+T is a full-duplex RS-485/RS-422 transceiver operating from a single +3.3V supply without a charge pump. It supports data rates up to 12Mbps with guaranteed performance across the industrial temperature range of -40°C to +85°C. The device incorporates ±15kV ESD protection on all I/O pins per IEC standards and features fail-safe receiver inputs that ensure a logic-high output when inputs are open. Driver outputs include short-circuit current limiting and thermal shutdown protection.

Feature Summary

• Full-duplex communication capability for simultaneous transmit and receive operations
• Enhanced electrostatic discharge protection meeting IEC 1000-4-2 air-gap and contact discharge standards
• Fail-safe receiver design guarantees a high logic state during input disconnection
• Driver overload protection via short-circuit current limiting and thermal shutdown circuitry

Applications

• Telecommunications systems
• Industrial-control local area networks
• Integrated Services Digital Networks (ISDN)
• Packet switching environments
• EMI-sensitive applications requiring robust signal integrity

Procurement Notes

Verify the specific suffix '+T' indicates tape-and-reel packaging configuration. Confirm the 'EE' designation corresponds to the extended -40°C to +85°C temperature rating. Ensure compatibility with existing board layouts utilizing the industry-standard 75176 pinout. Validate RoHS compliance status through official manufacturer documentation prior to final procurement decisions.

Selection Notes

Select this component for designs requiring full-duplex RS-485 or RS-422 connectivity at speeds up to 12Mbps. It is suitable for 3.3V logic systems interfacing directly with +5V tolerant devices. Consider this part over slew-rate-limited variants when maximum throughput is prioritized over electromagnetic interference reduction. Verify power supply constraints align with the specified single-supply operation requirements.

Part Context

This device belongs to the MAX3483E family of low-power transceivers manufactured by Analog Devices / Maxim Integrated. It shares architectural similarities with half-duplex models like the MAX3485E but provides independent transmit and receive channels. The SOIC-8 package offers a compact footprint suitable for space-constrained printed circuit board designs in industrial and telecommunications equipment.

Replacement Considerations

MAX3490ESA+