MAX1490ACPG

Drivers, Receivers, Transceivers Overview

The MAX1490ACPG is a complete, electrically isolated RS-485/RS-422 data-communications interface solution manufactured by Analog Devices Inc./Maxim Integrated. It integrates transceivers, optocouplers, and a transformer within a standard 24-pin DIP package. The device supports full-duplex communication with a maximum data rate of 2.5Mbps. It operates on a single +5V supply that powers both the logic and isolated sides of the interface. Key electrical characteristics include an isolation resistance of up to 10,000 MΩ and typical withstand voltages of 1600V RMS for one minute or 2000V RMS for one second.

Drivers, Receivers, Transceivers Feature Summary

• Integrates transceivers, optocouplers, and a power transformer into a single hybrid microcircuit for complete signal and power isolation.
• Features reduced-slew-rate drivers to minimize electromagnetic interference (EMI) and reduce reflections from improperly terminated cables.
• Includes thermal shutdown circuitry to protect against excessive power dissipation and short-circuit current limiting.
• Provides fail-safe receiver inputs that guarantee a known output state when the input terminals are left open.

Drivers, Receivers, Transceivers Applications

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

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'CPG' corresponds to the commercial temperature range (0°C to +70°C) and plastic DIP packaging as indicated in the ordering information. Confirm the component status remains active, as older Maxim Integrated products may undergo lifecycle changes. Ensure compatibility with existing PCB footprints for the 24-pin wide plastic DIP format before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select the MAX1490ACPG for applications requiring full-duplex communication over isolated RS-485 or RS-422 buses. This variant is suitable for environments where EMI reduction is critical due to its slew-rate limited drivers. Choose this part over non-isolated alternatives when galvanic isolation between the logic side and the field bus is required to protect sensitive control electronics from high-voltage transients.

Drivers, Receivers, Transceivers Part Context

This component 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 enables full-duplex operation. The 'A' designation indicates a maximum data rate of 2.5Mbps without slew-rate limiting, distinguishing it from the 'B' and 'C' variants which are limited to 250kbps but offer enhanced EMI performance.

Drivers, Receivers, Transceivers Replacement Considerations

Direct functional replacements within the same family include the MAX1490AEPI for extended temperature ranges (-40°C to +85°C). For half-duplex requirements, the MAX1480A/B/C series serves as a compatible alternative. Verify pinout compatibility and isolation voltage ratings when substituting with other isolated transceiver ICs from different manufacturers.