MAX1480CEPI+

Drivers, Receivers, Transceivers Overview

The MAX1480CEPI+ is a complete, electrically isolated RS-485/RS-422 data-communications interface solution housed in a 28-pin wide plastic DIP package. It integrates transceivers, optocouplers, and a transformer to provide galvanic isolation between the logic side and the signal path. The device operates on a single +5V supply and supports half-duplex communication with a maximum data rate of 250kbps due to its reduced-slew-rate driver. It features short-circuit current limiting, thermal shutdown protection, and a fail-safe receiver input that guarantees a known output state when the input is open circuit.

Drivers, Receivers, Transceivers Feature Summary

• Integrated electrical isolation utilizing internal optocouplers and a transformer for signal and power transfer across the barrier.
• Reduced-slew-rate driver design minimizes electromagnetic interference (EMI) and reduces reflections from improperly terminated cables.
• Built-in thermal shutdown circuitry protects against excessive power dissipation by placing outputs into a high-impedance state.
• Fail-safe receiver input ensures a defined logic output level if the differential input lines are left open.

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 an extended temperature range (-40°C to +85°C) compared to the standard commercial grade. Confirm the 'C' variant specifically includes the slew-rate limitation for 250kbps operation. Ensure the 28-pin PDIP package matches the target PCB footprint requirements before finalizing procurement orders.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring robust galvanic isolation in noisy industrial environments where EMI reduction is critical. The reduced-slew-rate driver makes it suitable for longer cable runs or poorly terminated buses compared to non-limited variants. Ensure the system design accommodates the necessary pull-up resistors for the open-collector receiver output and isolated drive pins as specified in the application circuits.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX1480A/B/C family of complete isolated interfaces. Unlike the MAX1490 series which offers full-duplex capability, the MAX1480 variants are designed exclusively for half-duplex communication. The 'C' designation distinguishes it from the 'A' (high-speed, no slew limit) and 'B' (slew-limited, slower enable time) variants within the same package and functional family.

Drivers, Receivers, Transceivers Replacement Considerations

MAX1480BCPI+ serves as a direct functional substitute within the same package and specification profile. Verify that any replacement maintains the 250kbps data rate limit and the specific timing characteristics associated with the slew-limited driver configuration.