MAX3442EASA+

Overview

The MAX3442EASA+ is a half-duplex RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply (4.75V to 5.25V) and supports data rates up to 250kbps with enhanced slew-rate limiting. The device features ±60V fault protection on the A and B pins, ±15kV ESD protection, and true fail-safe receiver inputs that guarantee a logic-high output when inputs are open or shorted. It includes low-power shutdown capability and hot-swap circuitry for telecom applications. The component is housed in an 8-pin SO package and is specified over an automotive temperature range of -40°C to +125°C.

Feature Summary

• ±60V Fault Protection
• Enhanced Slew-Rate-Limiting
• Low-Power Shutdown Mode
• Hot-Swap Capability

Applications

• RS-422/RS-485 Communications
• Industrial Networks
• Telecommunications Systems
• HVAC Controls

Procurement Notes

Verify the specific suffix 'A' indicates the automotive temperature grade (-40°C to +125°C). Confirm the '+' suffix denotes lead-free and RoHS compliance status. Ensure the package type matches the required 8-pin SO footprint for the target PCB layout. Cross-reference the manufacturer part number directly with official distributor catalogs to confirm current availability and authenticity.

Selection Notes

Select this model specifically for applications requiring reduced electromagnetic interference due to its enhanced slew-rate limiting feature. It is suitable for systems needing low-power consumption during idle states via the dedicated shutdown mode. Verify compatibility with the system's 5V logic levels and ensure the bus topology supports up to 128 units. Consider the automotive temperature rating if operating in harsh environments.

Part Context

This component belongs to the MAX3440E–MAX3444E family of fault-protected RS-485 and J1708 transceivers. It shares the same core architecture as other members like the MAX3440E and MAX3444E but is distinguished by its specific data rate capabilities and control pin configuration. The family is designed for robust communication in electrically noisy industrial and automotive settings.

Replacement Considerations

Direct functional substitutes within the same family include the MAX3440EESA+ and MAX3444EESA+, provided the application does not require the specific 250kbps slew-rate limited performance unique to the MAX3442E. Verify pinout compatibility and electrical specifications before substitution.