MAX490ECPA+

Drivers, Receivers, Transceivers Overview

The MAX490ECPA+ is a low-power, full-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a single +5V supply (4.75V to 5.25V) and supports data rates up to 2.5Mbps. The device features ±15kV ESD protection on driver outputs and receiver inputs without latchup. It contains one driver and one receiver in an 8-pin Plastic DIP package. The operating temperature range for the 'E' suffix is -40°C to +85°C. Supply current is typically 500µA when loaded.

Drivers, Receivers, Transceivers Feature Summary

• Full-duplex communication capability with independent driver and receiver enable controls.
• Integrated ±15kV electrostatic discharge protection on all signal pins.
• Short-circuit current limiting and thermal shutdown protection for driver outputs.
• Fail-safe receiver input that guarantees a logic-high output if the input is open circuit.

Drivers, Receivers, Transceivers Applications

• Low-power RS-485 communications in harsh environments
• Low-power RS-422 communications in harsh environments
• Industrial-control local area networks

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and temperature range. The 'CPA' suffix indicates an 8-pin Plastic DIP package. Ensure the 'E' suffix matches the required industrial temperature range of -40°C to +85°C. Cross-reference the component marking with the datasheet pin configuration to prevent substitution errors during assembly.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring full-duplex operation at speeds up to 2.5Mbps. It is suitable for systems needing robust ESD protection and fail-safe receiver behavior. Compare against slew-rate-limited variants like the MAX483E if electromagnetic interference reduction is a priority over maximum data throughput. Ensure the power supply voltage remains within the specified 4.75V to 5.25V range for optimal performance.

Drivers, Receivers, Transceivers Part Context

The MAX490E belongs to the MAX4xx series of low-power transceivers designed for RS-485 and RS-422 standards. This family includes half-duplex devices like the MAX485E and other full-duplex options. The MAX490E specifically provides full-duplex connectivity, distinguishing it from the half-duplex MAX485E which shares similar electrical characteristics but lacks separate transmit and receive lines.

Drivers, Receivers, Transceivers Replacement Considerations

MAX490ESA+ (SOIC-8 package)

Drivers, Receivers, Transceivers FAQ

Is the MAX490E capable of half-duplex communication?

No, the MAX490E is designed specifically for full-duplex communications, providing separate driver and receiver channels.

What is the maximum data rate supported by the MAX490E?

The MAX490E supports data transmission rates up to 2.5Mbps.

How does the MAX490E handle an open receiver input?

It features a fail-safe receiver input that guarantees a logic-high output state if the A or B input terminals are left open circuit.