MAX1487ESA+

Drivers, Receivers, Transceivers Overview

The MAX1487ESA+ is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features one driver and one receiver operating from a single 5V supply (4.75V to 5.25V). The device supports data rates up to 2.5Mbps with an unrestricted slew rate. It draws between 120µA and 500µA of supply current when disabled or loaded. The receiver input impedance is 1/4 unit load, allowing up to 128 transceivers on the bus. It includes short-circuit current limiting and thermal shutdown protection. The fail-safe receiver guarantees a high logic output if inputs are open. Operating temperature range is -40°C to +85°C.

Drivers, Receivers, Transceivers Feature Summary

• Quarter-unit-load receiver input impedance enables connection of up to 128 devices on the bus
• Driver outputs feature short-circuit current limiting and thermal shutdown protection
• Fail-safe receiver circuitry ensures a high logic output state during open-circuit conditions

Drivers, Receivers, Transceivers Applications

• Low-power RS-485 communication networks
• Industrial-control local area networks
• Level translation for asynchronous serial interfaces

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'ESA+' corresponds to the SOIC-8 package and the extended industrial temperature range (-40°C to +85°C) required for your design. Confirm RoHS compliance status through official manufacturer documentation prior to ordering. Ensure pinout compatibility with existing PCB layouts as pin configurations may vary across different package types within the same family.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring high node density on RS-485 buses due to its 1/4 unit load receiver impedance. It is suitable for systems needing data rates up to 2.5Mbps without slew-rate limitations. Compare against slew-rate-limited variants like the MAX487 if electromagnetic interference reduction is a primary design constraint rather than maximum speed.

Drivers, Receivers, Transceivers Part Context

The MAX1487 belongs to the MAX48x/MAX1487 family of low-power transceivers designed for bidirectional data communications on multipoint bus transmission lines. Unlike slew-rate-limited members of the series, the MAX1487 allows higher data throughput. It shares functional similarities with the MAX481 and MAX485 but distinguishes itself through its specific receiver loading characteristics that support larger network topologies.

Drivers, Receivers, Transceivers Replacement Considerations

MAX1487CSA: Same function in SOIC-8 package with commercial temperature range (0°C to +70°C).

Drivers, Receivers, Transceivers FAQ

How does the MAX1487 differ from the MAX487 regarding bus capacity?

The MAX1487 has a quarter-unit-load receiver input impedance, supporting up to 128 transceivers on the bus, whereas the MAX487 also supports 128 nodes but operates at a lower maximum data rate of 250kbps.

What protection mechanisms are included in the driver stage?

The driver stage includes short-circuit current limiting to protect against excessive output current and thermal shutdown circuitry that forces outputs to a high-impedance state if die temperature rises excessively.