MAX483ECSA+

Overview

The MAX483ECSA+ 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 operates from a single +5V supply (4.75V to 5.25V) and supports data rates up to 250kbps. Key electrical specifications include ±15kV ESD protection on all pins, a typical no-load supply current of 300µA, and a shutdown mode consuming only 0.5µA. The receiver input features fail-safe circuitry that guarantees a logic-high output when the input is open.

Feature Summary

• Slew-rate-limited drivers minimize electromagnetic interference (EMI) and reduce signal reflections caused by improperly terminated cables.
• Integrated ±15kV electrostatic discharge (ESD) protection on driver outputs and receiver inputs prevents latchup in harsh environments.
• Low-power shutdown mode significantly reduces supply current consumption when both driver and receiver are disabled.
• Fail-safe receiver input ensures a high logic state at the output if the bus line is disconnected or open-circuited.

Applications

• Low-power RS-485 communication networks
• Low-power RS-422 communication networks
• Level translation interfaces
• Industrial-control local area networks (LANs)
• Transceivers for applications sensitive to electromagnetic interference

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm temperature range and packaging type. The 'C' suffix indicates commercial temperature operation, while 'E' denotes extended range. Confirm whether the component is supplied in tubes or tape-and-reel formats based on the exact part number variant required for your assembly process.

Selection Notes

Select this component for designs requiring reduced EMI due to its slew-rate-limited driver characteristics. It is suitable for systems operating at data rates up to 250kbps where power efficiency is critical. Ensure the application environment falls within the specified temperature range for the 'C' suffix variant. Verify that the bus topology does not exceed the standard unit load limits associated with this device family.

Part Context

This device belongs to the MAX481E/MAX483E/MAX485E/MAX487E–MAX491E series of low-power transceivers designed for RS-485 and RS-422 communications. The series differentiates models primarily by data rate capabilities and duplex modes. The MAX483E specifically targets applications needing controlled signal rise and fall times to mitigate noise, distinguishing it from the higher-speed, unrestricted slew-rate variants like the MAX485E.

Replacement Considerations

The MAX483ECSA+ is functionally compatible with the non-protected MAX483CSA. For extended temperature ranges, the MAX483EEPA or MAX483EESA may be considered. Other series members like the MAX485E offer higher speeds but lack slew-rate limiting.