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2.5kVRMS Complete Isolated RS-485/RS-422
Module Transceiver + Power
The MAXM22510 and MAXM22511 isolated RS-485/
RS-422, full-duplex, transceiver modules provide
2500VRMS (60s) of galvanic isolation between the cable-
side (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
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
The MAXM22510/MAXM22511 are available in an LGA
44-pin package and operate over the -40°C to +105°C
Ordering Information appears at end of data sheet.
Benefits and 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
• 630VPEAK Maximum Repetitive Peak-Isolation
• 445VRMS Maximum Working-Isolation Voltage
• Withstands ±10kV Surge per IEC 61000-4-5
• Thermal Shutdown
Safety Regulatory Approvals Pending
●● UL According to UL1577
●● cUL According to CSA Bulletin 5A
●● Industrial Automation
●● Programmable Logic Controllers
●● Power Meters
●● Building Automation
19-100335; Rev 1; 7/18