MAX3490EESA

Overview

The MAX3490EESA is a full-duplex RS-485/RS-422 transceiver operating from a single +3.3V supply without requiring a charge pump. It supports data rates up to 12Mbps with a typical supply current of 1.9mA and shutdown current of 2nA. The device features ±15kV ESD protection (HBM), a -7V to +12V common-mode range, and fail-safe receiver inputs. Packaged in an 8-pin SOIC, it operates within a temperature range of -40°C to +85°C.

Feature Summary

• Full-duplex communication architecture providing independent transmit and receive channels
• Enhanced electrostatic discharge protection on all I/O pins for robust handling
• Integrated thermal shutdown and short-circuit current limiting for driver overload protection
• Fail-safe receiver design ensuring logic-high output during open-circuit conditions

Applications

• Telecommunications systems
• Industrial-control local area networks
• Transceivers for EMI-sensitive applications
• Integrated Services Digital Networks
• Packet switching equipment

Procurement Notes

Verify the specific suffix 'E' indicates the extended industrial temperature range (-40°C to +85°C) compared to commercial variants. Confirm the 'SA' package designation corresponds to the 8-pin Small Outline package. Ensure compatibility with existing board layouts utilizing the industry-standard 75176 pinout configuration.

Selection Notes

Select this component when full-duplex operation is required alongside high-speed transmission up to 12Mbps. It is suitable for designs needing robust ESD protection and fail-safe functionality without the complexity of slew-rate limiting found in lower-speed models. Verify that the system power budget accommodates the active supply current requirements.

Part Context

This part belongs to the MAX3483E family of low-power transceivers designed for RS-485 and RS-422 communications. It shares the same physical footprint and basic electrical characteristics as other members of the series, differing primarily in its full-duplex capability and maximum data rate specifications.

Replacement Considerations

MAX3490ESA+ is a RoHS-compliant version of the same functional device. ADM3488ARZ is listed as a similar alternative offering comparable interface capabilities.