MAX1487ESA+T

Drivers, Receivers, Transceivers Overview

The MAX1487ESA+T is a low-power, half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates one driver and one receiver in an 8-pin SO package. The device operates from a single 5V supply (4.75V to 5.25V) with a typical quiescent current of 230µA. It supports data rates up to 2.5Mbps without slew-rate limiting. Key features include quarter-unit-load receiver input impedance for up to 128 nodes on the bus, fail-safe receiver inputs, and thermal shutdown protection.

Drivers, Receivers, Transceivers Feature Summary

• Quarter-unit-load receiver input impedance allows connection of up to 128 transceivers on a single bus.
• Fail-safe receiver design guarantees a logic-high output state when differential inputs are open-circuited.
• Driver outputs incorporate short-circuit current limiting and thermal shutdown circuitry to prevent excessive power dissipation.

Drivers, Receivers, Transceivers Applications

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

Drivers, Receivers, Transceivers Procurement Notes

Verify that the ordering suffix 'T' corresponds to tape-and-reel packaging rather than tube packaging. Confirm the 'E' designation indicates the extended temperature range (-40°C to +85°C). Ensure the component matches the specific manufacturer lot codes and RoHS compliance status required for your assembly process.

Drivers, Receivers, Transceivers Selection Notes

Select this component for half-duplex applications requiring high node density due to its 1/4 unit load impedance. It is suitable for systems needing data rates up to 2.5Mbps where slew-rate limiting is not required. Compare against MAX487 if lower data rates and reduced EMI via slew-rate limiting are preferred instead.

Drivers, Receivers, Transceivers Part Context

The MAX1487 belongs to the Maxim Integrated family of low-power RS-485/RS-422 transceivers, which also includes the MAX481, MAX483, MAX485, and MAX487. Unlike the MAX487, which limits slew rate for EMI reduction at 250kbps, the MAX1487 offers unrestricted slew rates for higher speed communication while maintaining low power consumption.

Drivers, Receivers, Transceivers Replacement Considerations

MAX487ESA+T

Drivers, Receivers, Transceivers FAQ

Does the MAX1487 support full-duplex communication?

No, the MAX1487 is designed specifically for half-duplex applications. Full-duplex variants in this family include the MAX488 through MAX491.

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

Due to its quarter-unit-load receiver input impedance, the MAX1487 supports up to 128 transceivers on a single bus.