MAX3087CSA+T

Overview

The MAX3087CSA+T is a full-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply (4.75V to 5.25V) and supports data rates up to 10Mbps with unrestricted driver slew rates. The device features fail-safe circuitry that guarantees a logic-high receiver output when inputs are open or shorted. It incorporates thermal shutdown protection for the driver outputs and draws a typical quiescent current of 375µA. Packaged in an 8-pin SOIC, it provides one driver and one receiver with standard control inputs.

Feature Summary

• Fail-safe receiver circuitry ensures a high logic state during bus idle or fault conditions
• Thermal shutdown mechanism protects against excessive power dissipation
• High input impedance allows connection of up to 256 transceivers on a single bus

Applications

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

Procurement Notes

Verify the specific suffix CSA+T corresponds to the commercial temperature range (0°C to +70°C) and SOIC-8 package configuration. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering code matches the required lead-free specifications for your manufacturing process.

Selection Notes

Select this component for full-duplex applications requiring high-speed transmission up to 10Mbps without slew-rate limitations. It is suitable for environments where fail-safe behavior is critical during bus faults. Consider alternative models from the MAX308x family if half-duplex operation or lower data rates are sufficient for the design requirements.

Part Context

This part belongs to the MAX3080–MAX3089 series of high-speed transceivers designed for RS-485/RS-422 standards. The series differentiates models based on duplex mode, data rate capabilities, and slew-rate limiting features. The MAX3087 specifically targets full-duplex systems needing maximum speed within the standard 5V operating envelope.

Replacement Considerations

The MAX3087EESA+T is a pin-compatible variant offering an extended industrial temperature range (-40°C to +85°C). Verify that the environmental requirements of the application can be met by the commercial grade of the MAX3087CSA+T before substituting.