MAX1490BCPG+

Drivers, Receivers, Transceivers Overview

The MAX1490BCPG+ is a complete, electrically isolated RS-485/RS-422 data-communications interface solution in a hybrid microcircuit. It integrates transceivers, optocouplers, and a transformer within a standard 24-pin DIP package. The device supports full-duplex communication with reduced-slew-rate drivers that minimize EMI and reflections, enabling error-free data transmission at rates up to 250kbps. A single +5V supply on the logic side powers both sides of the interface. The receiver input includes a fail-safe feature guaranteeing a known output state if the input is open circuit.

Drivers, Receivers, Transceivers Feature Summary

• Complete electrical isolation between logic inputs and signal paths using integrated optocouplers and a transformer
• Reduced-slew-rate driver design minimizes electromagnetic interference (EMI) and cable reflection artifacts
• Integrated thermal shutdown and short-circuit current limiting protect the driver outputs from damage
• Fail-safe receiver input ensures a defined high logic level when the differential input lines are disconnected

Drivers, Receivers, Transceivers Applications

• Isolated RS-485/RS-422 Data Interface
• Transceivers for EMI-Sensitive Applications
• Industrial-Control Local Area Networks
• Automatic Test Equipment
• HVAC/Building Control Networks

Drivers, Receivers, Transceivers Procurement Notes

Verify the component matches the specific 'B' suffix designation, which indicates the 250kbps data rate capability and reduced slew rate features. Confirm the package type corresponds to the 24-pin Plastic DIP format. Ensure the temperature range aligns with the 'C' suffix specification for commercial operation. Cross-reference the manufacturer part number against official distributor catalogs to confirm authenticity and traceability.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring full-duplex communication over isolated RS-485 or RS-422 networks. The MAX1490BCPG+ is suitable where EMI reduction is critical due to its controlled driver slew rate. It is appropriate for systems needing galvanic isolation without separate external components. Consider the 24-pin DIP footprint for through-hole mounting requirements. Verify that the 250kbps maximum data rate meets the system's throughput needs.

Drivers, Receivers, Transceivers Part Context

This device belongs to the MAX1480A/MAX1480B/MAX1480C/MAX1490A/MAX1490B family of isolated interface solutions. While the MAX1480 variants support half-duplex communication, the MAX1490 series specifically provides full-duplex capabilities. The 'B' variant distinguishes itself from the 'A' version by offering reduced slew rates for lower EMI, contrasting with the unrestricted speed of the 'A' parts.

Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers: MAX1490ACPI, MAX1490AEPI, MAX1490BCPI, MAX1490BEPI.