2.5kVRMS Complete Isolated RS-485/RS-422 Module Transceiver + Power

2.5kVRMS Complete Isolated RS-485/RS-422 Module Transceiver with Integrated Isolated Power

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The MAXM22510 and MAXM22511 isolated RS-485/RS-422, full-duplex, transceiver modules provide 2500VRMS (60s) of galvanic isolation between the cableside (RS-485/RS-422 driver/receiver side) and the UART-side of the device. An integrated DC-DC powers the cable-side of the module. No external components are required.

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 (MAXM22510) and 25Mbps (MAXM22511).

The MAXM22510/MAXM22511 operate from a single 3.3V supply on the UART-side. An integrated DC-DC converter generates the 3.3V operating voltage for the cable-side of the module.

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 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 MAXM22510/MAXM22511 are available in an LGA 44-pin package and operate over the -40°C to +105°C temperature range.

MAXM22510, MAXM22511: Functional Diagram MAXM22510, MAXM22511: Functional Diagram Enlarge+

Key Features

  • Space Saving Solution
    • Fully Integrated Module for Compact Design
  • High-Performance Transceiver Enables Flexible Designs
    • Integrated DC-DC for Cable-Side Power
    • Compliant with RS-485 EIA/TIA-485 Standard
    • 500kbps Maximum Data Rate for the MAXM22510
    • 25Mbps Maximum Data Rate for the MAXM22511
    • Allows Up to 128 Devices on the Bus
  • Integrated Protection Ensures for Robust Communication
    • ±35kV ESD (HBM) on Driver Outputs/Receiver Inputs
    • 2.5kVRMS Withstand Isolation Voltage for 60 Seconds (VISO)
    • 630VPEAK Maximum Repetitive Peak-Isolation Voltage (VIORM)
    • 445VRMS Maximum Working-Isolation Voltage (VIOWM)
    • Withstands ±10kV Surge per IEC 61000-4-5
    • Thermal Shutdown


  • Building Automation
  • HVAC
  • Industrial Automation
  • Power Meters
  • Programmable Logic Controllers
Part NumberTx/RxDuplexVSUPPLY
Galvanic Isolation
Data Rate
ESD Protect.
Tx ENRx ENRx/Tx on BusSlew Rate LimitingOper. Temp.
typminSee Notes
MAXM22510 1Tx + 1RxFull3.3-2550015NoNo128No-40 to +105
MAXM22511 250025000YesYes-
$6.40 @1k
See All RS-485/RS-422 Line Driver/Receivers (204)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAXM22510: 2.5kVRMS Complete Isolated RS-485/RS-422 Module Transceiver + Power
MAXM22511: 2.5kVRMS Complete Isolated RS-485/RS-422 Module Transceiver + Power
MAXM22511EVKIT: Evaluation Kit for the MAXM22511

Technical Documents

App Note 6835 How to Design and Layout an EMI-Optimized PCB for the MAXM22511 Isolated RS-485 Transceiver Module

Quality and Environmental Data

Request Reliability Report for: MAXM22510 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAXM22510GLH+
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >


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