MAX14856

RECOMMENDED FOR NEW DESIGNS

MAX14856

5kV_RMS Isolated 500kbps/25Mbps Full-Duplex RS-485/RS-422 Transceivers with ±35kV ESD Protection

Industry's Most Robust Isolated RS-485

RECOMMENDED FOR NEW DESIGNS

MAX14856, MAX14858: Functional Diagram slide

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Features

High-Performance Transceiver Enables Flexible Designs
- Integrated LDO for Cable Side Power
- Compliant with RS-485 EIA/TIA-485 Standard
- 500kbps (MAX14856)/25Mbps (MAX14858) Maximum Data Rate
- Allows Up to 128 Devices on the Bus
Integrated Protection Ensures for Robust Communication
- ±35kV ESD (HBM) on Driver Outputs/Receiver Inputs
- 5kV_RMS Withstand Isolation Voltage for 60 Seconds (V_ISO)
- 1200V_PEAK Maximum Repetitive Peak-Isolation Voltage (V_IORM)
- 848V_RMS Maximum Working-Isolation Voltage (V_IOWM)
- > 30 Years Lifetime at Rated Working Voltage
- Withstands ±10kV Surge per IEC 61000-4-5
- Thermal Shutdown

Additional Details

The MAX14856/MAX14858 isolated RS-485/RS-422 transceivers provide 5000V_RMS (60s) of galvanic isolation between the cable side (RS-485/RS-422 driver/ receiver-side) and the UART side of the device. Isolation improves communication by breaking ground loops and reduces noise when there are large differences in ground potential between ports. These devices allow for robust communication up to 500kbps (MAX14856) or 25Mbps (MAX14858).

The devices include one drive channel and one receive channel. The receiver is 1/4-unit load, allowing up to 128 transceivers on a common bus.

Integrated true fail-safe circuitry ensures a logic-high on the receiver output when inputs are shorted or open. Undervoltage lockout disables the driver when the cable side or UART side power supplies are below functional levels.

The driver outputs and receiver inputs are protected from ±35kV electrostatic discharge (ESD) to GNDB on the cable side, as specified by the Human Body Model (HBM).

The devices are available in a wide-body 16-pin SOIC package and operate over the -40°C to +105°C temperature range.

Applications

HVAC
Industrial Automation Equipment
Power Meters
Programmable Logic Controllers

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 2

1ku List Price Starting From $4.28

Technical Documents 3

MAX14856-MAX14858: 5kV_RMS Isolated 500kbps/25Mbps Full-Duplex RS-485/RS-422 Transceivers with ±35kV ESD Protection Data Sheet (Rev.1) 03/20/2017

MAX14856 Reliability Data 01/12/2023

Safety and Regulatory Compliance Information 01/28/2016

Reference Materials 1

Safety and Regulatory Compliance Information 01/28/2016

Design Resources 2

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
MAX14856GWE+	16-SOIC_W-300_MIL	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
MAX14856GWE+T	16-SOIC_W-300_MIL	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

MAX14856GWE+
Pin/Package Drawing
16-SOIC_W-300_MIL
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

MAX14856GWE+T
Pin/Package Drawing
16-SOIC_W-300_MIL
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

MAX148X1EVKIT

Evaluation Kit for the MAX14852/MAX14854/MAX14856 and MAX14858

MAX148X1EVKIT

Evaluation Kit for the MAX14852/MAX14854/MAX14856 and MAX14858

Features and Benefits

Operates From a Single 3.3V Supply
Terminal Block Connectors for Easy RS-485/RS-422 Evaluation
Up to 5000V_RMS Isolation for 60s
Fully Assembled and Tested

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Product Detail

The MAX148X1 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the functionality of the MAX14852 isolated RS-485/RS-422 transceiver. The EV kit operates from a single 3.3V supply and features an onboard isolated power supply to power the secondary-side of the circuit.

The MAX148X1 EV kit may also be used to evaluate the MAX14854, MAX14856, and the MAX14858.

Applications