MAX22502EATC+T

Overview

The MAX22502EATC+T is a full-duplex RS-485/RS-422 transceiver optimized for high-speed communication over long cables. It supports data rates up to 100Mbps and operates on a VCC supply of 3V to 5.5V with a logic supply (VL) ranging from 1.6V to VCC. The device features integrated preemphasis circuitry, which reduces inter-symbol interference when supplied with 5V. Electrical characteristics include a typical supply current of 12.7mA, shutdown current of 5µA, and driver propagation delay of 20ns. It provides ±15kV ESD protection and operates within an ambient temperature range of -40°C to +125°C.

Feature Summary

• Integrated preemphasis circuitry extends reliable communication distance by reducing inter-symbol interference caused by long cables.
• Fail-safe receiver guarantees a logic-high output when input signals are shorted or open for longer than 10μs.
• Hot-swap protection prevents false transitions during power-up or hot-plug events.
• High noise rejection achieved through large receiver hysteresis and symmetrical receiver thresholds.

Applications

• Motion Control
• Encoder Interfaces
• Field Bus Networks
• Industrial Control Systems
• Backplane Busses

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and RoHS compliance status. Confirm that the tape-and-reel packaging matches the intended automated assembly requirements. Ensure the component meets all environmental specifications required for the target application environment.

Selection Notes

Select this component for applications requiring full-duplex communication at speeds up to 100Mbps over extended cable lengths. Consider the integrated preemphasis feature if signal integrity degradation due to cable attenuation is a concern. Verify that the system voltage requirements align with the specified 3V to 5.5V supply range and logic interface levels.

Part Context

This part belongs to the MAX22502E family of high-speed RS-485/RS-422 transceivers designed for robust industrial communications. The ATC+ variant specifically denotes the TDFN-EP package configuration with lead-free/RoHS-compliant materials. It serves as a specialized solution for environments demanding high noise immunity and long-distance data transmission capabilities.

Replacement Considerations

Consult official manufacturer documentation for confirmed substitute part numbers. Verify pin compatibility and electrical specifications before replacing components in existing designs.

FAQ

How is the preemphasis interval configured?

The preemphasis interval is set by connecting a resistor (RPSET) between the PSET pin and ground. An optimum interval ranges from 1 to 1.5 unit intervals.

What is the fail-safe behavior of the receiver?

The receiver guarantees a logic-high output on RO when the differential input voltage is less than 50mV for more than 10μs, such as when inputs are shorted or open.

Does the device support hot-swapping?

Yes, the DE and RE enable inputs feature hot-swap functionality to eliminate false transitions on the driver during power-up or hot-plug events.