MAX481ECPA+

Overview

The MAX481ECPA+ is a low-power, half-duplex RS-485/RS-422 transceiver in an 8-pin Plastic DIP 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 I/O pins without latchup. It includes one driver and one receiver with fail-safe inputs that guarantee a logic-high output when the bus is open. Supply current is typically 120µA to 500µA; a shutdown mode reduces consumption to 0.5µA. Operating temperature range is 0°C to +70°C.

Feature Summary

• Provides ±15kV electrostatic discharge protection on driver outputs and receiver inputs without latchup.
• Features fail-safe receiver inputs that ensure a high logic state if the differential input terminals are left open.
• Includes a low-current shutdown mode activated by specific control pin states to minimize power consumption.
• Driver outputs are protected against short circuits and excessive power dissipation via thermal shutdown circuitry.

Applications

• Low-power RS-485 communication networks
• Low-power RS-422 communication networks
• Industrial-control local area networks
• Transceivers for EMI-sensitive applications

Procurement Notes

Verify the component matches the exact part number MAX481ECPA+. Confirm the manufacturer is Analog Devices Inc./Maxim Integrated. Ensure the package type is 8-Pin Plastic DIP. Check the operating temperature range specification of 0°C to +70°C. Validate RoHS compliance status through official documentation.

Selection Notes

Select this component for half-duplex RS-485 or RS-422 applications requiring high-speed transmission up to 2.5Mbps. Choose the MAX481ECPA+ over slew-rate-limited variants like the MAX483E when maximum data throughput is prioritized over electromagnetic interference reduction. Ensure the system operates within the specified 0°C to +70°C temperature range and utilizes a single 5V power supply.

Part Context

This device belongs to the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E family of low-power transceivers designed for harsh environments. The 'E' suffix denotes enhanced ESD protection compared to standard versions. The 'C' indicates the commercial temperature range, while 'PA' specifies the plastic DIP package. These parts are intended for bidirectional data communications on multipoint bus transmission lines.

Replacement Considerations

The MAX481ECSA+ serves as a surface-mount alternative in an SO package. For higher speed requirements, consider the MAX1487E. For lower EMI applications, the MAX483E offers slew-rate limiting but is restricted to 250kbps. Verify pin compatibility and electrical specifications before substitution.