MAX483CPA

Overview

The MAX483CPA is an obsolete half-duplex transceiver for RS-422 and RS-485 communication, manufactured by Analog Devices Inc./Maxim Integrated. It integrates one driver and one receiver in an 8-pin plastic DIP package. The device supports data rates up to 250kbps with a reduced slew-rate driver to minimize EMI. It operates from a single 5V supply (4.75V to 5.25V) and draws 120µA of no-load supply current. A low-current shutdown mode reduces consumption to 0.1µA. The receiver includes a fail-safe feature guaranteeing a logic-high output if the input is open circuit.

Feature Summary

• Slew-rate limited drivers minimize electromagnetic interference and reduce reflections on improperly terminated cables.
• Fail-safe receiver guarantees a logic-high output state when the differential input is open circuit.
• Low-power shutdown mode significantly reduces supply current consumption when both driver and receiver are disabled.

Applications

• Industrial-control local area networks
• Transceivers for EMI-sensitive applications
• Level translators

Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels due to the part's obsolete status. Confirm that the specific ordering suffix corresponds to the required temperature range and packaging format. Request original datasheets and RoHS compliance documentation to ensure regulatory adherence before integration into production designs.

Selection Notes

Select this component for legacy systems requiring half-duplex RS-485/RS-422 communication at speeds up to 250kbps. The reduced slew rate makes it suitable for environments where electromagnetic interference must be minimized. Ensure the design accommodates the 8-pin PDIP footprint and 5V supply requirements. Consider modern equivalents if new manufacturing longevity is required.

Part Context

The MAX483CPA belongs to the MAX481/MAX483/MAX485 family of low-power transceivers. Unlike the MAX485 which lacks slew-rate limiting, the MAX483 features controlled edge rates to improve signal integrity over long distances. It shares pinout compatibility with other members of the series but differs in electrical specifications regarding data rate limits and electromagnetic emissions.

Replacement Considerations

Public confirmed substitute part numbers include MAX483EPA, MAX483ESA, and MAX483CUA. These variants offer extended temperature ranges or surface-mount packages while maintaining functional compatibility with the standard MAX483 specifications.