MAX281BCPA

Overview

The MAX281BCPA is a dual RS-422/RS-485 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 4.75 V to 5.25 V and supports data rates up to 10 Mbps. The device features fail-safe circuitry, ensuring the receiver output defaults to a logic high state when inputs are open. It is housed in an 8-pin PDIP package and functions as a full-duplex transceiver with one driver and one receiver per channel.

Feature Summary

• Fail-safe receiver design prevents erroneous logic states during idle or disconnected conditions
• High-speed data transmission capability supporting up to 10 Mbps
• Full-duplex operation allowing simultaneous transmit and receive on separate channels

Applications

• Industrial communication networks requiring robust RS-485 connectivity
• Building automation systems utilizing RS-422 point-to-point links
• Process control instrumentation interfaces

Procurement Notes

Verify the specific suffix 'B' against official datasheets to confirm temperature grade and pinout compatibility. Confirm the 'CPA' designation indicates a plastic DIP package through-hole mounting style. Cross-reference the manufacturer part number with current product lifecycle status to ensure availability for new designs.

Selection Notes

Select this component for applications requiring dual independent transceivers in a single package. Ensure the system environment stays within the specified commercial temperature range. Verify that the bus load and cable length requirements align with the 10 Mbps speed capability and standard termination needs.

Part Context

This part belongs to the MAX28x series of dual RS-422/RS-485 transceivers. It provides a compact solution for systems needing two isolated serial communication channels. The series is designed for reliable operation in noisy industrial environments where signal integrity is critical.

Replacement Considerations

Check for direct pin-compatible alternatives such as the MAX3080 or MAX3081 if single-channel suffices. Verify electrical specifications match exactly before substituting with other dual transceiver models from different manufacturers.