MAX3490EESA+

Overview

The MAX3490EESA+ is a full-duplex RS-485/RS-422 transceiver operating from a single +3.3V supply (3.0V to 3.6V). It supports data rates up to 12Mbps with guaranteed performance across the -40°C to +85°C temperature range. The device integrates one driver and one receiver in an 8-pin SOIC package. Key electrical characteristics include ±15kV ESD protection on I/O pins, a common-mode input voltage range of -7V to +12V, and fail-safe receiver inputs that ensure a logic-high output when inputs are open.

Feature Summary

• Full-duplex communication capability for simultaneous transmission and reception
• Enhanced electrostatic discharge protection on all transmitter outputs and receiver inputs
• Fail-safe receiver design guarantees a high logic state during open-circuit conditions
• Driver overload protection via short-circuit current limiting and thermal shutdown

Applications

• Telecommunications systems
• Industrial-control local area networks
• Integrated services digital networks
• Packet switching environments
• EMI-sensitive applications requiring robust signal integrity

Procurement Notes

Verify the component authenticity by checking the manufacturer marking against the official datasheet specifications. Confirm the package type matches the required 8-SOIC footprint and validate the extended temperature grade suffix 'EE' for industrial operation. Ensure the RoHS compliant status aligns with environmental regulations for the target assembly process.

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 applications needing wide common-mode voltage tolerance and high ESD immunity without external protection components. Consider alternative family members like the MAX3485E if half-duplex operation is sufficient, as it offers lower power consumption through a shutdown mode not present in the MAX3490E.

Part Context

This part belongs to the MAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E family of low-power transceivers. While sharing similar core technologies such as ESD protection and 3.3V operation, the MAX3490E is distinctively configured for full-duplex communication, unlike the half-duplex variants in the same series.

Replacement Considerations

The MAX3490ESA+ is a parameter-equivalent replacement within the same product line. Other full-duplex alternatives in the family include the MAX3488E and MAX3491E, though pin counts and duplex configurations may differ.