EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX33250E/ 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 MAX33251E Transceiver with 15kV ESD and Integrated Capacitors General Description Benefits and Features The MAX33250E and MAX33251E are isolated 2Tx/2Rx High Integration Saves Space and Simplifies Designs and 1Tx/1Rx RS-232 transceivers, respectively, with a Integrated Charge Pumps and Inverter Eliminates galvanic isolation of 600V (60sec) between the logic Extra Power Supplies RMS UART side and field side. The isolation barrier protects Four Internal Capacitors Saves PCB Space the logic UART side from electrical transient strikes from Integrated Isolator Saves Up to 63% Versus a the field side. It also breaks ground loops and large dif- Discrete Solution ferences in ground potentials between the two sides that Integrated Protection for Robust Communications can potentially corrupt the receiving and sending of data. 600V Withstand Isolation Voltage for 60 RMS The MAX33250E and MAX33251E conform to the EIA/ Seconds (V ) ISO TIA-232E standard and operate at data rates up to 1Mbps. 200V Working Voltage for >50 years (V ) RMS IOWM The isolated RS-232 transceivers have integrated charge Integrated 15kV ESD Human Body Model (HBM) pumps and an inverter to eliminate the need for a high Ordering Information appears at end of data sheet. positive and negative voltage supply. Both devices also have integrated charge pump and inverter capacitors to Simplified Block Diagram help further reduce PCB space. The supply pin V on CCA C2 C4 C1 C3 the UART logic side operates from a dual voltage sup- ply from +3V to +5.5V. V also operates from +3V to CCB V- V+ +5.5V, simplifying power requirements and enabling lev- VOLTAGE VOLTAGE DOUBLER INVERTER el translation between the two voltages. The transmitters VCCA VCCB and receivers on the field side of these devices are rated 0.1F 0.1F for 15kV of ESD HBM protection, suitable for applications where RS-232 cables are frequently worked on. T1IN T1OUT Both are available in a 12-pin, 6mm x 6mm LGA package and operate over the -40C to +85C temperature range. T2IN T2OUT Applications R1OUT R1IN* Diagnostics Equipment POS Systems Industrial Equipment R2OUT R2IN* GPS Equipment Communication Systems GNDA GNDB Medical Equipment *INTERNAL 5K PULLDOWN RESISTOR ON THE RS232 INPUTS 19-100400, Rev 1 11/18MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with 15kV ESD and Integrated Capacitors Absolute Maximum Ratings V to GNDA ......................................................... -0.3V to +6V Side A (V , T1IN, T2IN, R1OUT, R2OUT) to GNDA ESD2kV CCA CCA V to GNDB ......................................................... -0.3V to +6V Side B (V ) to GNDB ESD ...............................................2kV CCB CCB T IN to GNDA .......................................................... -0.3V to +6V Side B (T1OUT, T2OUT, R1IN, R2IN) to GNDB ESD HBM15kV T OUT to GNDB ............................................................... 13.2V Continuous Power Dissipation (Single Layer Board) (T = A R IN to GNDB...................................................................... 25V +70C, derate 10mW/C above +70C.) ...........................510mW R OUT to GNDA...................................................... -0.3V to +6V Continuous Power Dissipation (Multilayer Board) (T = A Short-Circuit Duration (T OUT to GNDB) .................. Continuous +70C, derate 10mW/C above +70C.) ...........................700mW Short-Circuit Duration (R OUT to GNDA).................. Continuous Operating Temperature Range.............................-40C to +85C 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 LGA-12 Package Code L1266M+1 Outline Number 21-100222 Land Pattern Number 90-100078 Thermal Resistance, Single-Layer Board: Junction-to-Ambient ( ) 157C/W JA Junction-to-Case Thermal Resistance ( ) 31C/W JC Thermal Resistance, Four-Layer Board: Junction-to-Ambient ( ) 115C/W JA Junction-to-Case Thermal Resistance ( ) 31C/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. www.maximintegrated.com Maxim Integrated 2