MAX3083ESD+

Overview

The MAX3083ESD+ is a full-duplex RS-422/RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply and supports data rates up to 500kbps with slew-rate-limited drivers. The device features fail-safe circuitry that guarantees a logic-high receiver output when inputs are open or shorted. It incorporates 1/8-unit-load receiver input impedance, allowing up to 256 transceivers on the bus. Key electrical parameters include a quiescent current of 375µA, driver short-circuit current limits, and an operating temperature range of -40°C to +85°C for the 'E' suffix variant.

Feature Summary

• Fail-safe receiver circuitry ensures a logic-high output during idle or fault conditions
• Slew-rate-limited drivers minimize electromagnetic interference and signal reflections
• High input impedance allows connection of up to 256 units on a single bus line
• Integrated thermal shutdown protects against excessive power dissipation

Applications

• RS-422/RS-485 communications networks
• Industrial-control local area networks
• Level translators in noisy environments
• Transceivers for EMI-sensitive applications

Procurement Notes

Verify the specific ordering suffix to confirm the package type and temperature range. The 'ESD+' designation indicates an SOIC-8 surface-mount package with an extended industrial temperature range. Confirm RoHS compliance status through official manufacturer documentation before finalizing procurement specifications.

Selection Notes

Select this component for full-duplex applications requiring moderate speed up to 500kbps. The slew-rate limitation makes it suitable for longer cable runs where signal integrity is critical. Ensure the system operates within the specified +5V supply voltage and consider the 1/8-unit-load capacity for network topology planning.

Part Context

This device belongs to the MAX3080–MAX3089 family of high-speed transceivers designed for RS-422 and RS-485 standards. The family offers various configurations including half-duplex options and selectable data rates. The MAX3083 specifically provides fixed full-duplex operation with intermediate speed capabilities compared to the 115kbps and 10Mbps variants in the series.

Replacement Considerations

The datasheet notes pin-compatibility with the industry-standard 75180 transceiver. Designers replacing legacy 75180 components should verify that the additional control pins (DE, RE) are properly managed in the existing circuit design.