MAX483CSA+

Overview

The MAX483CSA+ 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 within an 8-pin SOIC package. The device supports data transmission rates up to 250kbps with slew-rate-limited drivers to minimize electromagnetic interference. It operates on a single 5V supply (4.75V to 5.25V) and draws a typical quiescent current of 120µA. A dedicated shutdown mode reduces supply current to 0.1µA. The component features thermal shutdown protection and fail-safe receiver inputs.

Feature Summary

• Slew-rate-limited drivers reduce electromagnetic interference and signal reflections for reliable communication at lower speeds.
• Integrated low-power shutdown mode significantly decreases supply current consumption when the device is inactive.
• Fail-safe receiver design ensures a logic-high output state if the differential input lines are left open or disconnected.

Applications

• Industrial-control local area networks
• Low-power RS-485 communication systems
• EMI-sensitive applications requiring reduced signal harmonics

Procurement Notes

Verify that the ordering suffix corresponds to the CSA package variant, which indicates an 8-pin Small Outline package with a commercial temperature range. Confirm RoHS compliance status through official manufacturer documentation before procurement. Ensure the specific batch matches the required lead-free specifications for your assembly process.

Selection Notes

Select this component for half-duplex bus architectures where power efficiency and EMI reduction are prioritized over high-speed data transfer. It is suitable for systems operating strictly within the 5V voltage domain. Designers should account for the slower propagation delays inherent in slew-rate-limited circuits compared to unrestricted drivers.

Part Context

This part belongs to the MAX48x family of low-power transceivers designed for multipoint bus transmission lines. Unlike the MAX485, which lacks slew-rate limiting, the MAX483 specifically targets applications where minimizing high-frequency noise is critical. It shares pin compatibility with other members of the series but offers distinct electrical characteristics regarding data rate limits.

Replacement Considerations

MAX483ESA+