MAX14775EASA+T

Drivers, Receivers, Transceivers Overview

The MAX14775EASA+T is a half-duplex RS-485/RS-422 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It features ±65V fault protection on driver outputs and receiver inputs, ensuring robust communication in harsh industrial environments. The device operates over a supply voltage range of 3.0V to 5.5V and supports data rates up to 20Mbps. It includes one driver and one receiver with a 1/3-unit load input impedance, allowing up to 100 devices on a bus. The component is housed in an 8-pin SOIC package and operates within a temperature range of -40°C to +125°C.

Drivers, Receivers, Transceivers Feature Summary

• Integrated ±65V fault protection for signal lines ensures resilience against overvoltage conditions without external components.
• High noise tolerance achieved through large receiver hysteresis and fail-safe logic that guarantees a high output when inputs are open or shorted.
• Hot-swap functionality protects against data errors during board insertion by managing enable inputs during power-up sequences.
• Thermal shutdown circuitry disables outputs when junction temperatures exceed specified limits to prevent damage.

Drivers, Receivers, Transceivers Applications

• Industrial Field Bus Networks
• Motion Controllers
• HVAC Systems

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix '+T' corresponds to the tape and reel packaging format required for automated assembly processes. Confirm the 'E' designation indicates the extended temperature range variant suitable for industrial applications. Ensure compatibility with RoHS compliance standards as indicated by the '+' suffix in the part number.

Drivers, Receivers, Transceivers Selection Notes

Select this component for designs requiring high-speed data transmission up to 20Mbps alongside significant overvoltage protection capabilities. Consider the 8-pin SOIC package dimensions for PCB layout constraints. Evaluate the 1/3-unit load specification if connecting multiple transceivers to a single bus line to ensure proper network loading.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX14775E/MAX14776E series of fault-protected transceivers. It is functionally paired with the MAX14776E, which offers slew-rate limited outputs for lower data rates. Evaluation kits such as the MAX14775EEVKIT are available for testing these specific transceiver models in application circuits.

Drivers, Receivers, Transceivers Replacement Considerations

The MAX14775EASA+ is the non-tape-and-reel equivalent of this component. Designers may also consider the MAX14776EASA+T for applications requiring reduced data rates up to 500kbps with similar fault protection characteristics.

Drivers, Receivers, Transceivers FAQ

How does the device handle hot-swap events?

The MAX14775EASA+T features internal pulldown/pullup circuitry on the DE and RE pins that holds them in safe states for at least 10μs during power-up, preventing unwanted driver activation during board insertion.

What is the fail-safe behavior of the receiver?

The receiver guarantees a logic-high output on RO when the A and B inputs are open, shorted, or connected to a terminated line with all drivers disabled for longer than the typical delay to fail-safe operation (10μs).

Can the device withstand continuous short-circuit conditions?

Yes, the driver outputs are protected against short-circuit conditions. If a short persists, the outputs enter a high-impedance state temporarily before re-enabling, preventing excessive power dissipation.