MAX14770EGUA+T

Drivers, Receivers, Transceivers Overview

The MAX14770EGUA+T is a half-duplex RS-485 transceiver designed for PROFIBUS-DP and industrial fieldbus applications. It operates from a single +4.5V to +5.5V supply with a typical no-load supply current of 2.5mA and a shutdown current of 15µA. The device supports data rates up to 20Mbps and features ±35kV HBM ESD protection on the A and B pins, along with ±12kV contact and ±15kV air-gap IEC 61000-4-2 protection. It utilizes a 1/4 unit load receiver input impedance, allowing up to 128 transceivers on the bus. The component is housed in an 8-pin µMAX package and is specified over an extended temperature range of -40°C to +105°C.

Drivers, Receivers, Transceivers Feature Summary

• Integrated ±35kV HBM ESD protection on differential lines ensures robustness against electrostatic discharge events.
• True fail-safe receiver guarantees a logic-high output when inputs are open or shorted, preventing false transitions.
• Hot-swap capability prevents disturbances on the bus during power-up or hot insertion by holding enable inputs in a safe state.
• Driver outputs include short-circuit current limiting and thermal shutdown circuitry to protect against excessive power dissipation.

Drivers, Receivers, Transceivers Applications

• PROFIBUS-DP Networks
• Industrial Fieldbuses
• Motion Controllers
• RS-485 Networks
• Machine Encoders

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'GUA' corresponds to the 8-pin µMAX package and the -40°C to +105°C automotive temperature range. Confirm that the '+T' designation indicates tape and reel packaging if required for automated assembly processes. Ensure compatibility with the intended voltage supply levels and interface requirements before finalizing procurement.

Drivers, Receivers, Transceivers Selection Notes

Select this component for applications requiring high ESD immunity on the communication lines without external protection components. The 1/4 unit load characteristic makes it suitable for networks requiring more than 32 nodes. Verify that the operating temperature range meets the environmental conditions of the deployment site, as this variant is rated for extended temperatures rather than the full automotive range found in TDFN packages.

Drivers, Receivers, Transceivers Part Context

The MAX14770E series includes variants in SO, µMAX, and TDFN packages. The EGUA suffix specifically denotes the µMAX package form factor. Other series members like MAX14770EESA+T offer the same electrical performance in an 8-pin SOIC package, while MAX14770EATA+T provides the same functionality in a tiny TDFN package with an exposed pad for improved thermal performance and automotive temperature ratings.

Drivers, Receivers, Transceivers Replacement Considerations

Direct pin-compatible replacements within the same family include MAX14770EESA+T (SO package) and MAX14770EGSA+T (SO package). For applications requiring the exposed pad and higher temperature rating, MAX14770EATA+T is an alternative, though the package footprint differs significantly.