MAX487ESA+T

Drivers, Receivers, Transceivers Overview

The MAX487ESA+T is a low-power, half-duplex RS-485 and RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates one driver and one receiver in an 8-pin SOIC package. The device supports data rates up to 250kbps with slew-rate-limited drivers to minimize EMI. It operates on a single 5V supply (4.75V to 5.25V) within an industrial temperature range of -40°C to +85°C. Key electrical features include a 120µA typical no-load supply current, a 0.1µA shutdown mode, and a quarter-unit-load receiver input impedance allowing up to 128 devices on the bus.

Drivers, Receivers, Transceivers Feature Summary

• Slew-rate limited drivers reduce electromagnetic interference and signal reflections for error-free transmission at lower speeds.
• Quarter-unit-load receiver input impedance enables high node density, supporting up to 128 transceivers on a single bus.
• Low-power shutdown mode significantly reduces supply current consumption when the device is disabled.
• Integrated thermal shutdown and short-circuit current limiting protect the driver outputs from excessive power dissipation.

Drivers, Receivers, Transceivers Applications

• Industrial-control local area networks
• EMI-sensitive applications requiring reduced noise emissions
• Multipoint communication systems utilizing RS-485 or RS-422 protocols

Drivers, Receivers, Transceivers Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm that the ordering suffix matches the required package type and temperature grade. Ensure compliance with relevant environmental standards such as RoHS before finalizing procurement decisions.

Drivers, Receivers, Transceivers Selection Notes

Select this component for half-duplex applications requiring robust performance in electrically noisy environments. The slew-rate limitation makes it suitable for longer cable runs where signal integrity is critical. Consider the shutdown capability for battery-powered systems requiring minimal standby current consumption.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487 family of low-power transceivers. Unlike the MAX485 which lacks slew-rate limiting, the MAX487 includes controlled edge rates. It differs from full-duplex variants like the MAX488 by using a single differential pair for bidirectional communication.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX483 offers similar functionality but supports only 32 unit loads on the bus instead of 128. The MAX485 provides higher speed capabilities up to 2.5Mbps but lacks the slew-rate limiting feature found in the MAX487.