MAX1487EESA+T

Drivers, Receivers, Transceivers Overview

The MAX1487EESA+T is a low-power, half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features one driver and one receiver housed in an 8-pin SOIC package with tape-and-reel packaging. The device operates on a single +5V supply (4.75V to 5.25V) and supports data rates up to 2.5Mbps. It provides ±15kV ESD protection on all pins without latchup. Key electrical parameters include a no-load supply current of 230µA to 400µA, a maximum power dissipation of 471mW in the SOIC-8 package, and an operating temperature range of -40°C to +85°C.

Drivers, Receivers, Transceivers Feature Summary

• Provides ±15kV electrostatic discharge protection on driver outputs and receiver inputs without latchup.
• Features quarter-unit-load receiver input impedance allowing up to 128 transceivers on the bus.
• Includes thermal shutdown circuitry that places driver outputs into a high-impedance state during excessive power dissipation.
• Receiver input has a fail-safe feature guaranteeing a logic-high output if the input is open circuit.

Drivers, Receivers, Transceivers Applications

• Low-Power RS-485 Transceivers
• Low-Power RS-422 Transceivers
• Industrial-Control Local Area Networks

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the 'E' designation ensures the extended temperature range (-40°C to +85°C). Ensure the ordering information matches the exact manufacturer part number to avoid confusion with non-ESD protected variants or different package styles.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring high-speed data transmission up to 2.5Mbps on multipoint bus lines. It is suitable for harsh environments due to robust ESD protection. Unlike slew-rate-limited versions, this model does not restrict driver slew rates, making it appropriate for faster communication needs where EMI is managed through proper termination.

Drivers, Receivers, Transceivers Part Context

This device belongs to the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E/MAX1487E family of low-power transceivers. It shares pin configurations and functional similarities with other members like the MAX487E but differs in data rate specifications and slew-rate limiting characteristics defined within the broader product line.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers: MAX487EESA+T, MAX485EESA+T, MAX481EESA+T.

Drivers, Receivers, Transceivers FAQ

Does the MAX1487E support full-duplex communication?

No, the MAX1487E is designed specifically for half-duplex applications. Full-duplex options in this family include the MAX488E through MAX491E.

What is the maximum number of transceivers supported on the bus?

Due to its quarter-unit-load receiver input impedance, the MAX1487E allows up to 128 transceivers to be connected on a single bus.

How does the device protect against short circuits?

The drivers are short-circuit current limited and protected against excessive power dissipation by thermal shutdown circuitry that forces outputs into a high-impedance state.