MAX3442EESA+

Overview

The MAX3442EESA+ is a half-duplex RS-485 transceiver in an 8-pin SO package. It operates from a single +4.75V to +5.25V supply and supports data rates up to 250kbps. 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 mode with a maximum supply current of 20µA. Hot-swap circuitry prevents false transitions during board insertion into live backplanes.

Feature Summary

• ±60V fault protection withstands signal faults on communication bus lines without damage
• Low-power shutdown mode reduces supply current to a maximum of 20µA
• Hot-swap input structure eliminates false transitions during initialization or connection to a live backplane
• Enhanced slew-rate limiting minimizes electromagnetic interference and reflections for error-free transmission

Applications

• RS-422/RS-485 communications
• Industrial networks
• Telecommunications systems
• HVAC controls

Procurement Notes

Verify the component against official Analog Devices documentation to confirm lead-free status and RoHS compliance. Ensure the specific suffix matches the required temperature range and package type. Cross-reference pin configurations and electrical characteristics with the manufacturer's datasheet before integration.

Selection Notes

Select this model for applications requiring low-speed data transmission up to 250kbps where reduced electromagnetic interference is critical. The enhanced slew-rate limiting makes it suitable for environments with improperly terminated cables. Verify compatibility with the system's power supply voltage and ensure the thermal operating range meets the application requirements.

Part Context

This component belongs to the MAX3440E–MAX3444E family of fault-protected transceivers. While other variants in the series support higher data rates up to 10Mbps, the MAX3442E specifically incorporates slew-rate limiting to minimize EMI. It shares the same 8-pin SO package and core protection features as its siblings within the product line.

Replacement Considerations

The MAX3440E and MAX3444E are functionally similar but lack the low-power shutdown capability found in the MAX3442E. The MAX3441E and MAX3443E offer higher data rates but do not include slew-rate limiting. Verify control pin configurations and shutdown requirements when substituting.