MAX481ESA+

Overview

The MAX481ESA+ is a half-duplex RS-485/RS-422 transceiver in an 8-pin SOIC package. It operates from a single +5V supply (4.75V to 5.25V) and supports data rates up to 2.5Mbps with unrestricted driver slew rates. The device features ±15kV ESD protection on all pins, low-power shutdown mode consuming 0.5µA, and thermal shutdown circuitry. It includes fail-safe receiver inputs that guarantee a logic-high output when the bus is open.

Feature Summary

• Provides ±15kV electrostatic discharge protection on driver outputs and receiver inputs without latchup.
• Features a low-current shutdown mode activated by specific control pin states for minimal power consumption.
• Includes thermal shutdown circuitry to protect against excessive power dissipation by forcing outputs to a high-impedance state.
• Receiver input incorporates a fail-safe feature ensuring a logic-high output if the differential input is open-circuited.

Applications

• Low-Power RS-485 Transceivers
• Low-Power RS-422 Transceivers
• Level Translators
• Transceivers for EMI-Sensitive Applications
• Industrial-Control Local Area Networks

Procurement Notes

Verify the component matches the exact part number MAX481ESA+. Confirm the manufacturer is Analog Devices Inc./Maxim Integrated. Ensure the suffix indicates the RoHS-compliant version (+). Check the package type is 8-SOIC and the temperature range is -40°C to +85°C. Validate authenticity through authorized distributors or official manufacturer channels.

Selection Notes

Select this component for half-duplex applications requiring data rates up to 2.5Mbps. It is suitable for harsh environments due to robust ESD protection. Use this part instead of non-E versions when higher ESD immunity is required. Note that it does not support full-duplex communication; use MAX488E–MAX491E variants for full-duplex needs.

Part Context

The MAX481E is part of the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E family of low-power transceivers. This family shares similar packaging and basic functionality but varies in data rate capabilities and duplex modes. The 'E' designation specifically denotes enhanced ESD protection compared to standard versions.

Replacement Considerations

Public confirmed substitute part numbers: MAX481ECSA, MAX481EEPA, MAX481ECPA.