MAX14853

RECOMMENDED FOR NEW DESIGNS

2.75kV_RMS Isolated 500kbps/25Mbps Full-Duplex RS-485/RS-422 Transceivers with ±35kV ESD Protection and Integrated Transformer Driver

Industry's Most Robust Isolated RS-485

Data Sheet (Rev. 5) Product Selection Table

Part Models: 2
1ku List Price: Starting From $4.33

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Overview

Higher Integration Simplifies Designs
- Integrated LDO for Powering Cable-Side
- Integrated Transformer Driver for Power Transfer to Cable-Side
High-Performance Transceiver Enables Flexible Designs
- Compliant with RS-485 EIA/TIA-485 Standard
- 500kbps (MAX14853)/25Mbps (MAX14855) Maximum Data Rate
- Up to 128 Devices on the Bus
- Slew-Rate Limited Outputs (MAX14853)
- Integrated Receiver Deglitch Filter Increases Noise Immunity (MAX14853)
Integrated Protection Ensures for Robust Communication
- ±35kV ESD (HBM) on Driver Outputs/Receiver Inputs
- 2.75kV_RMS Withstand Isolation Voltage for 60s (V_ISO)
- 630V_PEAK Maximum Repetitive Peak Isolation Voltage (V_IORM)
- 445V_RMS Maximum Working Isolation Voltage (V_IOWM)
- > 30 Years Lifetime at Rated Working Voltage
- Withstands ±10kV Surge per IEC 61000-4-5
- Thermal Shutdown

The MAX14853/MAX14855 isolated RS-485/RS-422 transceivers provide 2750V_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 (MAX14853) or 25Mbps (MAX14855).

The MAX14853/MAX14855 include an integrated 450kHz transformer driver for power transfer to the cable-side of the transceiver using an external transformer. An integrated LDO provides a simple and space-efficient architecture for providing power to the cable-side of the IC.

The MAX14853/MAX14855 include one drive channel and one receive channel. The receiver is ¼-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 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 MAX14853/MAX14855 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

Part Models: 2
1ku List Price: Starting From $4.33

Documentation

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
MAX14853GWE+	16-SOIC_W-300_MIL	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX14853GWE+T	16-SOIC_W-300_MIL	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

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

Hardware Ecosystem

Parts	Product Life Cycle	Description
Interface Transceivers & Isolators 1
MAX3535E	RECOMMENDED FOR NEW DESIGNS	+3V to +5V, 2500V_RMS Isolated RS-485/RS-422 Transceivers with ±15kV ESD Protection

Tools & Simulations

IBIS Model 1

MAX14853 IBIS Model

Evaluation Kits

Evaluation Kit for the MAX14853/MAX14855/MAX14857 and MAX14859

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Features and Benefits

Operates from a Single 3.3V Supply
Terminal Block Connectors for Easy RS-485/RS-422 Evaluation
2750V_RMS Isolation for 60s
Fully Assembled and Tested

Product Details

The MAX148X2 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the functionality of the MAX14855 isolated RS-485/RS-422 transceiver. The EV kit operates from a single 3.3V supply and features an on-board isolated power supply to power the secondary side of the circuit.

The MAX148X2EVKIT may also be used to evaluate the MAX14853, MAX14857, and MAX14859.

Applications