MAX3085ECPA+

Overview

The MAX3085ECPA+ is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply and supports data rates up to 500kbps with enhanced slew-rate limiting. The device features true fail-safe circuitry, guaranteeing a logic-high receiver output when inputs are open or shorted. It provides ±15kV ESD protection for all I/O pins using the Human Body Model. The component includes one driver and one receiver within an 8-pin Plastic DIP package.

Feature Summary

• Enhanced slew-rate limiting minimizes electromagnetic interference (EMI) and reduces signal reflections caused by improperly terminated cables.
• True fail-safe receiver guarantees a logic-high output state when receiver inputs are left open or shorted.
• Robust electrostatic discharge protection rated at ±15kV on all transmitter outputs and receiver inputs.

Applications

• RS-422 and RS-485 communication networks
• Industrial control local area networks
• Level translation applications

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm the package type and temperature range. Confirm RoHS compliance status directly from the manufacturer's datasheet or product compliance page before procurement.

Selection Notes

Select this component for half-duplex applications requiring transmission speeds up to 500kbps. Ensure the system design accommodates the 8-pin Plastic DIP footprint and operates within the specified -40°C to +85°C temperature range.

Part Context

This part belongs to the MAX3080E–MAX3089E family of high-speed transceivers. While pin-compatible with industry-standard devices like the 75180, it incorporates additional fail-safe and ESD protection features not present in legacy equivalents.

Replacement Considerations

Pin-compatible with the SN75180. Verify that replacement components support the required 500kbps data rate and maintain equivalent ±15kV ESD protection levels.

FAQ

What is the maximum data rate supported by the MAX3085E?

The MAX3085E supports transmit speeds up to 500kbps due to its enhanced slew-rate limiting capabilities.

How does the fail-safe feature function?

The fail-safe circuitry guarantees a logic-high receiver output if the receiver inputs are open, shorted, or connected to a terminated bus with all drivers disabled.

Is the MAX3085E capable of full-duplex operation?

No, the MAX3085E is designed specifically for half-duplex communications.