MAX3087ESA+T

Overview

The MAX3087ESA+T is a full-duplex RS-422/RS-485 transceiver featuring one driver and one receiver in an 8-pin SOIC package. It supports data rates up to 10Mbps with no slew-rate limiting. The device operates on a single +5V supply (4.75V to 5.25V) and draws 375µA typical quiescent current. It includes fail-safe circuitry ensuring a logic-high receiver output when inputs are open or shorted, and offers ±13V input voltage protection.

Feature Summary

• Fail-safe design guarantees a logic-high receiver output when the bus is idle or disconnected.
• High-speed transmission capability up to 10Mbps without slew-rate limitations.
• Supports connection of up to 256 transceivers on a single bus due to 1/8-unit-load receiver impedance.

Applications

• RS-422 and RS-485 communication networks
• Industrial-control local area networks
• Level translators for digital interfaces

Procurement Notes

Verify the specific suffix 'ESA+T' against official documentation to confirm the tape-and-reel packaging format and lead-free status. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the manufacturer's part number guide to validate ordering details before procurement.

Selection Notes

Select this component for applications requiring full-duplex communication at speeds up to 10Mbps. It is suitable for systems needing high noise immunity via fail-safe features and support for large network topologies. Consider thermal management if operating near maximum temperature limits.

Part Context

This device belongs to the MAX3080–MAX3089 family of high-speed transceivers designed for RS-422/RS-485 standards. The MAX3087 specifically provides full-duplex operation with unrestricted driver slew rates, distinguishing it from slew-rate-limited variants in the same series.

Replacement Considerations

The MAX3086EESA+T is a pin-compatible alternative within the same family that also supports 10Mbps full-duplex communication. Verify electrical characteristics and package dimensions match before substitution.

FAQ

What is the receiver input impedance of the MAX3087?

The receiver input impedance is 96kΩ, which corresponds to a 1/8-unit load, allowing up to 256 transceivers on the bus.

How does the fail-safe feature operate?

It guarantees a logic-high receiver output when the receiver inputs are open, shorted, or connected to a terminated line with all drivers disabled.

Is the driver slew rate limited in this model?

No, the MAX3087 has no slew-rate limiting, enabling transmit speeds up to 10Mbps.