MAX487CPA+

Drivers, Receivers, Transceivers Overview

The MAX487CPA+ is a low-power, half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single 5V supply and features one driver and one receiver with slew-rate-limited outputs to minimize electromagnetic interference. The device supports data rates up to 250kbps and includes a low-current shutdown mode consuming only 0.1µA. Its quarter-unit-load receiver input impedance allows for up to 128 transceivers on the bus. Key protection features include thermal shutdown and short-circuit current limiting.

Drivers, Receivers, Transceivers Feature Summary

• Slew-rate-limited drivers reduce EMI and reflections for error-free transmission
• Quarter-unit-load receiver input impedance supports up to 128 nodes on the bus
• Low-current shutdown mode reduces power consumption to 0.1µA
• Thermal shutdown and short-circuit current limiting protect against excessive power dissipation

Drivers, Receivers, Transceivers Applications

• Industrial-control local area networks
• EMI-sensitive applications requiring reduced signal harmonics
• Multipoint bus transmission lines for bidirectional data communication

Drivers, Receivers, Transceivers Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm the package type matches the required PCB footprint and ensure the operating temperature range aligns with the specific application environment. Check for RoHS compliance status if environmental regulations apply to the final product assembly.

Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring high node density on an RS-485 bus due to its 1/4 unit load specification. It is suitable for environments where electromagnetic interference must be minimized through controlled slew rates. Ensure the system operates within the 4.75V to 5.25V supply voltage range and requires half-duplex communication capabilities.

Drivers, Receivers, Transceivers Part Context

The MAX487CPA+ belongs to the MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487 family of low-power transceivers. This series provides versatile interface solutions for RS-485 and RS-422 communications. The MAX487 variant specifically distinguishes itself with reduced slew rates and high bus loading capacity compared to standard unit load devices in the same family.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX1487 serves as a functional substitute within the same family, offering similar quarter-unit-load characteristics but supporting higher data rates up to 2.5Mbps. Designers should verify pin compatibility and electrical specifications when substituting components.