MAX3483ESA+T

Overview

The MAX3483ESA+T is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single 3.0V to 3.6V supply and supports data rates up to 0.25Mbps with slew-rate-limited drivers. The device features one driver and one receiver in an 8-pin SO package, rated for -40°C to +85°C operation. Key electrical parameters include a typical supply current of 1.1mA, shutdown current of 2nA, and a common-mode input voltage range of -7V to +12V. Driver outputs are protected by short-circuit current limiting and thermal shutdown circuitry.

Feature Summary

• Slew-rate limited drivers minimize electromagnetic interference (EMI) and reduce signal reflections on improperly terminated cables.
• Low-power shutdown mode reduces supply current to typically 2nA when both Receiver Enable and Driver Enable pins are controlled appropriately.
• Fail-safe receiver guarantees a logic-high output state if both differential inputs are left open.
• Driver outputs feature foldback current limiting and thermal shutdown protection against excessive power dissipation.

Applications

• Telecommunications systems requiring robust serial communication
• Industrial-control local area networks (LANs)
• Transceivers designed for EMI-sensitive applications

Procurement Notes

Verify the specific suffix 'ESA' confirms the industrial temperature range (-40°C to +85°C) and SOIC-8 package type. Confirm the '+T' designation indicates tape-and-reel packaging rather than tube. Ensure the component source matches the official Analog Devices or Maxim Integrated manufacturing records to avoid counterfeit parts.

Selection Notes

Select this component for half-duplex RS-485 or RS-422 applications where low data rates up to 250kbps are sufficient. The slew-rate limitation makes it suitable for long cable runs or noisy environments where minimizing EMI is critical. Compare against MAX3485 if higher speeds up to 10Mbps are required without slew-rate limiting.

Part Context

This part belongs to the MAX3483/MAX3485/MAX3486/MAX3488/MAX3490/MAX3491 family of 3.3V-powered transceivers. While sharing similar pinouts and core functionality, variants differ in duplex mode and speed. The MAX3483 specifically targets low-speed, EMI-sensitive half-duplex bus communications compared to the faster MAX3485 or full-duplex MAX3490.

Replacement Considerations

MAX3483ECPA+ offers the same electrical specifications in an 8-pin PDIP package. MAX3483ESAT is the identical electronic component but may differ in reel packaging specifications. Verify that any substitute maintains the slew-rate-limited characteristic if EMI reduction is a design requirement.