MAX33073E

RECOMMENDED FOR NEW DESIGNS

+3V to +5.5V, Polarity Invert RS-485 Half-Duplex Transceiver with ±65V Fault Protection, ±40V CMR, and ±40kV ESD

Industry's Highest Common-Mode Range RS-485 at ±40V, with Highest ESD at ±40kV and ±65V of Fault Protection

Data Sheet (Rev. 1)

Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.57

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Overview

Integrated Protection for Robust Communication
- Protection on Driver Outputs/Receiver Inputs (A, B Data Lines)
  - ±65V Fault Protection Range on Driver Outputs/Receiver Inputs
  - ±40V Common-Mode Range on Driver Outputs/Receiver Inputs
  - ±40kV Human Body Model (JEDEC JS-001-2017) ESD Protection
  - ±15kV Air Gap Discharge (IEC 61000-4-2) ESD Protection
  - ±10kV Contact Discharge (IEC 61000-4-2) ESD Protection
- Hot-Swap Protection
- Short Circuit Protection
- Thermal Shutdown
- True Fail-Safe Guarantees Known Receiver Output State
- Wide Operating Temperature Range from -40°C to +125°C
High-Performance Transceiver Enables Flexible Designs
- Compliant with RS-485 EIA/TIA-485 Standard
- 500kbps (MAX33072E), 2Mbps (MAX33073E) Maximum Data Rate
- 3V to 5.5V Supply Range
- 1/8 Unit Load for up to 256 Devices on the Bus

The MAX33072E/MAX33073E are a family of fault-protected RS-485/RS-422 transceivers with high ±65V protection for overvoltage conditions on the communication bus lines, ensuring robust protection in harsh industrial environments. Both devices have ±40V of common-mode range (CMR) within V_CCH (+4.5V to +5.5V), exceeding the RS-485 standard of -7V to +12V, suitable for electrically noisy environments where different systems have shifting ground levels relative to each other. They also incorporate a high ESD protection circuit capable of protecting against ±40kV of ESD HBM (human body model) for driver outputs and receiver inputs (A and B data lines). Each device contains one driver and one receiver and operates over the +3V to +5.5V supply range, making it convenient for designers to use one part with either +3.3V or +5V supply voltages across multiple end equipment.

These devices feature a polarity selection input (POL) that swaps the A and B data lines, allowing for software correction of cross-wired field cables.

The MAX33072E features slew-rate-limited outputs for data rates up to 500kbps, while the MAX33073E is rated up to 2Mbps for applications requiring higher bandwidth. These transceivers are optimized for robust communication in noisy environments. A true failsafe feature guarantees a logic-high on the receiver output when the inputs are open or shorted. Driver outputs are protected against short-circuit conditions. The receivers feature a 1/8 unit load input impedance, allowing up to 256 transceivers on a bus. The MAX33072E/MAX33073E are available in 8-pin SOIC and operate over the -40°C to +125°C temperature range.

Applications

Agriculture and Heavy Machinery
Elevator Control
Home and Building Automation
Industrial Automation Equipment
Motion Controllers
Power Supply and UPS

Part Models: 2
1ku List Price: Starting From $2.57

Documentation

Data Sheet 1

MAX33072E-MAX33073E: +3V to +5.5V, Polarity Invert RS-485 Half-Duplex Transceiver with ±65V Fault Protection, ±40V CMR, and ±40kV ESD Data Sheet (Rev.1) 01/10/2022
- Open Interactive Page

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX33073EASA+	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX33073EASA+T	Small-Outline IC, Narrow (0.15in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Tools & Simulations

IBIS Model 1

MAX33073E IBIS Model

Evaluation Kits

Evaluation Kit for the MAX33072E

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Features and Benefits

Easy Evaluation of the MAX33072E
I/O Interface Compatibility from 1.71V to 5.5V
Proven PCB Layout
Mbed/Arduino Platform Compatible
Fully Assembled and Tested

Product Details

The MAX33072E Shield evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the functionality of the MAX33072E half- duplex RS-485 transceiver, with ±65V fault protection, extended ±40V common-mode range, and ±40kV ESD Human Body Model (HBM) for A,B data lines. The EV kit features a digital isolator, which is used as a level translator between the RS-485 transceiver and the controller interface.