MAX1487CSA+

Drivers, Receivers, Transceivers Overview

The MAX1487CSA+ is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It integrates one driver and one receiver within an 8-pin SOIC package. The device supports data transmission rates up to 2.5Mbps with a supply voltage range of 4.75V to 5.25V. It operates across an industrial temperature range of -40°C to +85°C. Key electrical characteristics include a typical quiescent current of 230µA, short-circuit current limiting, and thermal shutdown protection. The receiver input features a quarter-unit-load impedance, allowing up to 128 transceivers on the bus.

Drivers, Receivers, Transceivers Feature Summary

• Quarter-unit-load receiver input impedance enables connection of up to 128 transceivers on the bus
• Driver outputs are protected against excessive power dissipation via thermal shutdown circuitry
• Receiver inputs feature fail-safe functionality that guarantees a logic-high output when the input is open circuit

Drivers, Receivers, Transceivers Applications

• Low-power RS-485 communication networks
• Low-power RS-422 communication networks
• Industrial-control local area networks
• Transceivers for EMI-sensitive applications

Drivers, Receivers, Transceivers Procurement Notes

Verify the component authenticity through official manufacturer channels or authorized distributors. Confirm the specific suffix 'CSA+' corresponds to the required 8-SOIC package and -40°C to +85°C operating temperature range. Ensure compliance with relevant environmental standards such as RoHS before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component for half-duplex applications requiring high node density due to its 1/4 unit load receiver impedance. It is suitable for systems needing data rates up to 2.5Mbps without slew-rate limiting. Consider alternative models like the MAX487 if lower data rates and reduced EMI via slew-rate limiting are prioritized over maximum bus capacity.

Drivers, Receivers, Transceivers Part Context

The MAX1487 belongs to the broader family of low-power RS-485/RS-422 transceivers from Maxim Integrated, which includes the MAX481, MAX483, MAX485, MAX487, and MAX491. This family shares common architectural features such as single 5V operation and integrated protection circuits, but varies in data rate capabilities and shutdown modes.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX487CSA+ serves as a functional substitute within the same series, offering similar half-duplex operation but with a slew-rate-limited driver capped at 250kbps. Other compatible alternatives include the MAX481CSA+ and MAX485CSA+, though these utilize standard unit load impedances limiting bus capacity to 32 nodes.