MAX1490BEPG

Drivers, Receivers, Transceivers Overview

The MAX1490BEPG is a complete, electrically isolated RS-485/RS-422 data-communications interface solution manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply and supports full-duplex communication with a maximum data rate of 250kbps. The device features reduced-slew-rate drivers to minimize EMI and reflections. It typically withstands 1600V RMS (1 minute) or 2000V RMS (1 second) isolation voltage. Operating temperature range is -40°C to +85°C. It is housed in a 24-pin Plastic DIP package.

Drivers, Receivers, Transceivers Feature Summary

• Integrated electrical isolation using transceivers, optocouplers, and a transformer within a standard DIP package.
• Reduced-slew-rate driver capability minimizes electromagnetic interference and signal reflections for error-free transmission.
• Single +5V logic-side supply powers both the isolated and non-isolated sides of the interface.
• Built-in thermal shutdown protects against excessive power dissipation by placing outputs in a high-impedance state.

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 specific suffix 'E' indicates the extended temperature range (-40°C to +85°C) compared to commercial variants. Confirm the 'PG' suffix corresponds to the 24-pin Plastic DIP package as specified in the datasheet ordering information. Ensure compatibility with existing isolation barrier requirements before procurement.

Drivers, Receivers, Transceivers Selection Notes

Select the MAX1490BEPG for applications requiring full-duplex communication over isolated RS-485 or RS-422 buses. Choose this variant over the 'A' version if lower data rates up to 250kbps are sufficient but reduced EMI via slew-rate limiting is required. Ensure the design accommodates the 24-pin DIP footprint and external pull-up resistors for the open-collector receiver output.

Drivers, Receivers, Transceivers Part Context

The MAX1490BEPG belongs to the MAX1490 family of isolated interface ICs. It shares the same core architecture as the MAX1490A but differs in data rate capabilities and driver slew rate limitations. This family provides a hybrid microcircuit solution combining transceivers and isolation components, simplifying board layout for industrial communication networks.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX1490A is a functional substitute offering higher data rates up to 2.5Mbps without slew-rate limiting. For half-duplex applications, the MAX1480B may be considered, though it lacks full-duplex capability. Verify pinout compatibility and isolation voltage ratings when substituting.