MAX481EPA+

Overview

The MAX481EPA+ is a low-power, half-duplex RS-485 and RS-422 transceiver manufactured by Analog Devices Inc. under the Maxim Integrated brand. It operates from a single +5V supply (4.75V to 5.25V) and features one driver and one receiver in an 8-pin Plastic DIP package. The device supports data rates up to 2.5Mbps with no slew-rate limiting. Key electrical specifications include ±15kV ESD protection on all pins, a typical no-load supply current of 120µA, and a shutdown mode consuming only 0.5µA for the MAX481E variant. It includes thermal shutdown and short-circuit current limiting for robust operation in harsh environments.

Feature Summary

• Provides ±15kV electrostatic discharge (ESD) protection on driver outputs and receiver inputs without latchup.
• Features a low-power shutdown mode that reduces supply current to 0.5µA when both driver and receiver are disabled.
• Includes thermal shutdown circuitry and foldback current limiting to protect against excessive power dissipation and short circuits.

Applications

• Low-power RS-485 communication networks
• Low-power RS-422 communication networks
• Industrial control local area networks
• EMI-sensitive applications requiring high-speed transmission

Procurement Notes

Verify the complete part number including the suffix 'PA+' to ensure the correct 8-pin Plastic DIP package and lead-free compliance. Confirm the operating temperature range corresponds to the 'E' suffix (-40°C to +85°C). Check current availability status as distribution may vary. Ensure the application requires half-duplex operation compatible with this specific transceiver model.

Selection Notes

Select the MAX481EPA+ when high-speed data transmission up to 2.5Mbps is required, as it lacks slew-rate limiting unlike the MAX483E. Choose this component for harsh environments needing ±15kV ESD protection. Consider the low-power shutdown feature if energy conservation during idle periods is critical. Verify that the system voltage matches the specified +5V supply requirement.

Part Context

The MAX481EPA+ belongs to the MAX481E/MAX483E/MAX485E family of low-power transceivers designed for RS-485 and RS-422 communications. This series is characterized by its ruggedness in harsh environments and low standby power consumption. The 'E' designation indicates enhanced ESD protection compared to standard versions. The PA+ suffix specifically denotes the 8-pin PDIP package with lead-free termination.

Replacement Considerations

The MAX481ECPA+ serves as a commercial grade alternative with a 0°C to +70°C temperature range. For full-duplex requirements, consider the MAX488E or MAX490E series. If lower data rates suffice, the MAX483E offers slew-rate limiting to reduce EMI.