MAX1490BEPG+

Drivers, Receivers, Transceivers Overview

The MAX1490BEPG+ is a complete, electrically isolated RS-485/RS-422 data-communications interface solution in a hybrid microcircuit. It features full-duplex communication with reduced-slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables, allowing error-free data transmission at rates up to 250kbps. The device integrates transceivers, optocouplers, and a transformer within a standard 24-pin DIP package. A single +5V supply on the logic side powers both sides of the interface. Drivers are short-circuit current limited and protected against excessive power dissipation by thermal shutdown circuitry.

Drivers, Receivers, Transceivers Feature Summary

• Complete electrical isolation between logic inputs and signal paths using integrated optocouplers and a transformer.
• Reduced-slew-rate driver outputs designed to minimize electromagnetic interference (EMI) and signal reflections.
• Integrated fail-safe receiver input that guarantees a known output state when the input is open circuit.
• Driver protection against excessive power dissipation via thermal shutdown circuitry.

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 component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix 'E' indicates the extended temperature range (-40°C to +85°C). Ensure the '+'' designation confirms compliance with RoHS standards. Cross-reference the 24-pin DIP package dimensions against the target PCB footprint to ensure mechanical compatibility before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring full-duplex communication over isolated RS-485 or RS-422 networks. The MAX1490B is suitable where EMI reduction is critical due to its reduced-slew-rate drivers. Compare against non-isolated alternatives if galvanic isolation is not required. Consider the MAX1490A variant if higher data rates up to 2.5Mbps are necessary, as it lacks slew-rate limiting. Verify that the 24-pin DIP package fits the available board space constraints.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX1480/MAX1490 family of isolated interface solutions from Maxim Integrated. While the MAX1480 variants support half-duplex communication, the MAX1490 series specifically enables full-duplex operation. These devices consolidate the functions of transceivers, optocouplers, and power drivers into a single hybrid microcircuit, simplifying design for electrically noisy industrial environments compared to discrete component implementations.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX1490BCPG+ is a documented substitute within the same product family offering identical functionality and specifications.