EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. 2.5kV Complete Isolated RS-485/RS-422 MAXM22510/MAXM22511 RMS Module Transceiver + Power General Description Benefits and Features The MAXM22510 and MAXM22511 isolated RS-485/ Space Saving Solution RS-422, full-duplex, transceiver modules provide Fully Integrated Module for Compact Design 2500V (60s) of galvanic isolation between the cable- High-Performance Transceiver Enables Flexible Designs RMS side (RS-485/RS-422 driver/receiver side) and the UART- Integrated DC-DC for Cable-Side Power side of the device. An integrated DC-DC powers the Compliant with RS-485 EIA/TIA-485 Standard 500kbps Maximum Data Rate for the MAXM22510 cable-side of the module. No external components are required. 25Mbps Maximum Data Rate for the MAXM22511 Allows Up to 128 Devices on the Bus Isolation improves communication by breaking ground Integrated Protection Ensures for Robust Communication loops and reduces noise when there are large differences 35kV ESD (HBM) on Driver Outputs/Receiver Inputs in ground potential between ports. These devices allow 2.5kV Withstand Isolation Voltage for 60 RMS for robust communication up to 500kbps (MAXM22510) Seconds (V ) ISO and 25Mbps (MAXM22511). 630V Maximum Repetitive Peak-Isolation PEAK The MAXM22510/MAXM22511 operate from a single Voltage (V ) IORM 3.3V supply on the UART-side. An integrated DC-DC 445V Maximum Working-Isolation Voltage RMS converter generates the 3.3V operating voltage for the (V ) IOWM cable-side of the module. Withstands 10kV Surge per IEC 61000-4-5 Thermal Shutdown The devices include one drive channel and one receive channel. The receiver is 1/4-unit load, allowing up to 128 Safety Regulatory Approvals transceivers on a common bus. UL According to UL1577 Integrated true fail-safe circuitry ensures a logic-high on cUL According to CSA Bulletin 5A the receiver output when inputs are shorted or open. Applications Undervoltage lockout disables the driver when cable-side Industrial Automation or UART-side power supplies are below functional levels. Programmable Logic Controllers The driver outputs and receiver inputs are protected HVAC from 35kV electrostatic discharge (ESD) to GNDB on Power Meters the cable-side, as specified by the Human Body Model Building Automation (HBM). The MAXM22510/MAXM22511 are available in an LGA Functional Diagram 44-pin package and operate over the -40C to +105C temperature range. MAXM22510 MAXM22511 GNDA DC-DC VRECT VLDO Ordering Information appears at end of data sheet. VDDB VDDA LDO SD RXD A RE B DE Z Y TXD SBA GNDA GNDB 19-100335 Rev 2 6/19 RS-485 TRANSCEIVERMAXM22510/MAXM22511 2.5kV Complete Isolated RS-485/RS-422 RMS Module Transceiver + Power Absolute Maximum Ratings V to GNDA .......................................................-0.3V to +4V Continuous Power Dissipation (T = +70C) DDA A V to GNDB ........................................................-0.3V to +6V 44-pin LGA (derate 28.6mW/C above +70C) .........2286mW DDB V , V to GNDB ...........................................-0.3V to +8V Operating Temperature Range ......................... -40C to +105C RECT LDO SD, TXD, DE, RE to GNDA ....................................-0.3V to +6V Junction Temperature ......................................................+125C SBA, RXD to GNDA ..............................-0.3V to (V + 0.3V) Storage Temperature Range ............................ -65C to +125C DDA A, B, Y, Z to GNDB ...................................................-8V to +13V Soldering Temperature (reflow) .......................................+245C Short-Circuit Duration (RXD, SBA to GNDA, A, B, Y, Z ,V to GNDB) ....................................Continuous DDB Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Information PACKAGE TYPE: 44 LGA Package Code L44119M+1 Outline Number 21-100226 Land Pattern Number 90-100107 THERMAL RESISTANCE, FOUR-LAYER BOARD Junction to Ambient ( ) 48C/W JA Junction to Case ( ) (top) 39.2C/W JC For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. DC Electrical Characteristics (V V = 3.0V to 3.6V, T = T to T , unless otherwise noted. Typical values are at V V = 3.3V, V = DDA GNDA A MIN MAX DDA GNDA GNDA V , and T = +25C.) (Notes 1, 2) GNDB A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS POWER Supply Voltage V 3.0 3.6 V DDA V = 3.3V, DE = high, RE = TXD = DDA Supply Current I low, SD = low, RXD unconnected, 25 44 mA DDA no load Shutdown Supply Current I V = 3.3V, SD = high 0.01 10 A SD DDA V V rising 2.55 2.7 2.85 Undervoltage Lockout UVLOA DDA V Threshold V V rising 2.55 2.7 2.85 UVLOB DDB V 200 Undervoltage Lockout UVHYSTA mV Threshold Hysteresis V 200 UVHYSTB Unregulated DC-DC Output V = 3.3V, DE = high, RE = TXD = DDA V 6 V RECT Voltage low, SD = low, no load Maxim Integrated 2 www.maximintegrated.com