MAX481CPA+

Overview

The MAX481CPA+ 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 PDIP package. The device operates from a single 5V supply with a maximum data rate of 2.5Mbps. Key electrical specifications include a quiescent current of 300µA and a shutdown current of 0.1µA. It features short-circuit current limiting and thermal shutdown protection for the driver outputs. The receiver input includes a fail-safe mechanism that guarantees a logic-high output when the input is open circuit.

Feature Summary

• Low-power operation with dedicated shutdown mode reducing supply current to 0.1µA
• Integrated fail-safe receiver input ensuring high logic state during open-circuit conditions
• Driver outputs protected against excessive power dissipation via thermal shutdown circuitry

Applications

• Low-Power RS-485 Transceivers
• Low-Power RS-422 Transceivers
• Level Translators
• Transceivers for EMI-Sensitive Applications
• Industrial-Control Local Area Networks

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required temperature range and package type. Ensure compliance with relevant regulatory standards such as RoHS before integration into final assemblies.

Selection Notes

Select this component for applications requiring half-duplex communication at speeds up to 2.5Mbps. It is suitable for systems needing low standby power consumption due to its shutdown capability. Consider alternative models if full-duplex operation or higher data rates are required for the specific design constraints.

Part Context

This part belongs to the MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487 family of low-power transceivers designed for RS-485 and RS-422 communications. The series provides various options for data rates, duplex modes, and bus loading capabilities to suit different industrial networking requirements.

Replacement Considerations

Public confirmed substitute part numbers: MAX481ESA+, MAX481CSA+, MAX481CUA+. These variants share identical functional characteristics but differ in package type or operating temperature range.