MAX483EESA+T

Overview

The MAX483EESA+T is a low-power, half-duplex RS-485 and RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates one driver and one receiver in an 8-pin SOIC package. The device operates from a single +5V supply (4.75V to 5.25V) and supports data rates up to 250kbps with slew-rate-limited drivers to minimize EMI. Key electrical parameters include ±15kV ESD protection on all pins, a no-load supply current of 120µA to 250µA, and a shutdown supply current of 0.5µA to 10µA. It features thermal shutdown and short-circuit current limiting for the driver, and a fail-safe receiver input that guarantees a logic-high output if the input is open.

Feature Summary

• Slew-rate-limited drivers reduce electromagnetic interference (EMI) and signal reflections caused by improperly terminated cables.
• Integrated ±15kV electrostatic discharge (ESD) protection on driver outputs and receiver inputs without latchup.
• Low-power shutdown mode significantly reduces supply current when both driver and receiver are disabled.
• Fail-safe receiver input ensures a high logic state output when the differential input terminals are left open.

Applications

• Low-power RS-485 communication networks
• Low-power RS-422 communication networks
• Level translation interfaces
• Industrial-control local area networks (LANs)
• Transceivers for applications sensitive to electromagnetic interference

Procurement Notes

Verify the component authenticity by checking the manufacturer marking against the official datasheet specifications. Confirm the package type matches the required 8-SOIC footprint and ensure the temperature grade corresponds to the industrial range (-40°C to +85°C). Cross-reference the ordering suffix with the manufacturer's latest documentation to confirm pinout and functional compatibility before integration into production designs.

Selection Notes

Select this component for systems requiring robust ESD protection and reduced EMI emissions at moderate data speeds. It is suitable for harsh environments where standard transceivers might fail due to static discharge. Ensure the design accommodates the specific propagation delays associated with slew-rate limiting. Compare with non-E versions if ESD protection is not required and cost minimization is the primary objective.

Part Context

This part belongs to the MAX481E/MAX483E/MAX485E family of low-power transceivers designed for RS-485 and RS-422 communications. Unlike the MAX485E which supports higher speeds, the MAX483E variant specifically incorporates slew-rate limiting to enhance performance in electrically noisy or poorly terminated bus environments while maintaining low power consumption.

Replacement Considerations

The MAX483ECSA+T is a direct pin-compatible alternative in a smaller SOIC package. For non-slew-rate limited applications, the MAX485E series may be considered if higher data rates are required. Standard versions without ESD protection (e.g., MAX483) are functionally compatible but lack the ruggedized I/O structures.