MAX3088EEPA+

Overview

The MAX3088EEPA+ is a half-duplex RS-485/RS-422 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 10Mbps with unrestricted driver slew rates. The device features ±15kV ESD protection on all I/O pins and fail-safe circuitry that guarantees a logic-high receiver output when inputs are open or shorted. It draws 600µA of typical supply current and operates within an industrial temperature range of -40°C to +85°C. Packaged in an 8-pin Plastic DIP, it allows up to 256 transceivers on the bus.

Feature Summary

• Fail-safe receiver circuitry ensures a logic-high output during idle or fault conditions while maintaining EIA/TIA-485 compatibility.
• Enhanced electrostatic discharge protection rated at ±15kV via Human Body Model for robust operation in noisy environments.
• High-speed transmission capability up to 10Mbps due to unrestricted driver slew rates.

Applications

• RS-422 and RS-485 communication networks
• Industrial control local area networks
• EMI-sensitive applications requiring high-speed data transfer

Procurement Notes

Verify the specific suffix EEPA+ against official documentation to confirm the extended temperature range (-40°C to +85°C) and PDIP-8 package type. Confirm RoHS compliance status through manufacturer datasheets prior to integration. Ensure pinout alignment with existing PCB layouts as this component is pin-compatible with industry standards like the 75180.

Selection Notes

Select the MAX3088EEPA+ for designs requiring high-speed half-duplex communication without slew-rate limitations. This model is suitable for systems needing robust ESD protection and fail-safe behavior under open-circuit conditions. Verify that the system power supply remains within the specified 4.75V to 5.25V range to ensure optimal performance and adherence to electrical specifications.

Part Context

This component belongs to the MAX3080E–MAX3089E family of high-speed transceivers. Within this series, the MAX3088E variant is specifically designated for half-duplex operations with unrestricted slew rates. It shares architectural similarities with other members but differs in duplex mode configuration and speed capabilities compared to slew-rate-limited counterparts.

Replacement Considerations

The MAX3088EEPA+ is pin-compatible with the industry-standard 75180 transceiver. Designers may consider direct replacements if additional features implemented on pins 1, 6, 8, and 13 of the MAX3089E are not required. Ensure any substitute maintains the same half-duplex configuration and 10Mbps data rate support.

FAQ

What is the fail-safe behavior of the MAX3088EEPA+?

The device guarantees a logic-high receiver output when the receiver inputs are open, shorted, or connected to a terminated bus with all drivers disabled. This occurs because the receiver threshold is set between -50mV and -200mV.

How does the MAX3088EEPA+ handle ESD events?

All transmitter outputs and receiver inputs are protected against ±15kV electrostatic discharge using the Human Body Model, providing enhanced reliability in electrically noisy industrial environments.

Is the MAX3088EEPA+ compatible with standard RS-485 termination?

Yes, the receiver input impedance is 1/8-unit-load, allowing up to 256 transceivers on the bus. The fail-safe thresholds comply with the ±200mV EIA/TIA-485 standard.