MAX33250EELC+

EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX33250E/ MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors General Description Benefits and Features The MAX33250E and MAX33251E are isolated 2Tx/2Rx and 1Tx/1Rx RS-232 transceivers, respectively, with a galvanic isolation of 600VRMS (60sec) between the logic UART side and field side. The isolation barrier protects the logic UART side from electrical transient strikes from the field side. It also breaks ground loops and large differences in ground potentials between the two sides that can potentially corrupt the receiving and sending of data. The MAX33250E and MAX33251E conform to the EIA/ TIA-232E standard and operate at data rates up to 1Mbps. ● High Integration Saves Space and Simplifies Designs • Integrated Charge Pumps and Inverter Eliminates Extra Power Supplies • Four Internal Capacitors Saves PCB Space • Integrated Isolator Saves Up to 63% Versus a Discrete Solution The isolated RS-232 transceivers have integrated charge pumps and an inverter to eliminate the need for a high positive and negative voltage supply. Both devices also have integrated charge pump and inverter capacitors to help further reduce PCB space. The supply pin VCCA on the UART logic side operates from a dual voltage supply from +3V to +5.5V. VCCB also operates from +3V to +5.5V, simplifying power requirements and enabling level translation between the two voltages. The transmitters and receivers on the field side of these devices are rated for ±15kV of ESD HBM protection, suitable for applications where RS-232 cables are frequently worked on. ● Integrated Protection for Robust Communications • 600VRMS Withstand Isolation Voltage for 60 Seconds (VISO) • 200VRMS Working Voltage for >50 years (VIOWM) • Integrated ±15kV ESD Human Body Model (HBM) Ordering Information appears at end of data sheet. Simplified Block Diagram C1 C2 C3 C4 V- V+ VOLTAGE DOUBLER VOLTAGE INVERTER VCCA VCCB 0.1µF 0.1µF T1IN T1OUT T2IN T2OUT Both are available in a 12-pin, 6mm x 6mm LGA package and operate over the -40ºC to +85ºC temperature range. Applications ● ● ● ● ● ● Diagnostics Equipment POS Systems Industrial Equipment GPS Equipment Communication Systems Medical Equipment R1OUT R1IN* R2OUT R2IN* GNDA GNDB *INTERNAL 5K PULLDOWN RESISTOR ON THE RS232 INPUTS 19-100400, Rev 1; 11/18 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors Absolute Maximum Ratings VCCA to GNDA ......................................................... -0.3V to +6V VCCB to GNDB ......................................................... -0.3V to +6V T_IN to GNDA .......................................................... -0.3V to +6V T_OUT to GNDB ............................................................... ±13.2V R_IN to GNDB ...................................................................... ±25V R_OUT to GNDA ...................................................... -0.3V to +6V Short-Circuit Duration (T_OUT to GNDB) .................. Continuous Short-Circuit Duration (R_OUT to GNDA) .................. Continuous Side A (VCCA, T1IN, T2IN, R1OUT, R2OUT) to GNDA ESD±2kV Side B (VCCB) to GNDB ESD ............................................... ±2kV Side B (T1OUT, T2OUT, R1IN, R2IN) to GNDB ESD HBM±15kV Continuous Power Dissipation (Single Layer Board) (TA = +70°C, derate 10mW/°C above +70°C.) ...........................510mW Continuous Power Dissipation (Multilayer Board) (TA = +70°C, derate 10mW/°C above +70°C.) ...........................700mW Operating Temperature Range .............................-40°C to +85°C 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 (θJA) 157°C/W Junction-to-Case Thermal Resistance (θJC) 31°C/W Thermal Resistance, Four-Layer Board: Junction-to-Ambient (θJA) 115°C/W Junction-to-Case Thermal Resistance (θJC) 31°C/W 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 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors Electrical Characteristics (VCCA - VGNDA = 3.0V to 5.5V, VCCB - VGNDB = 3.0V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCCA - VGNDA = 3.3V, VCCB - VGNDB = 3.3V, VGNDA = VGNDB, and TA = +25°C. (Note 1), Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Specifications marked "GBD" are guaranteed by design and not production tested.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5.5 V POWER Supply Voltage VCCA, VCCB ICCA Supply Current ICCB 3.0 VCCA = 5V, R_IN and T_IN idle 12 VCCA = 3.3V, R_IN and T_IN idle 10 VCCB = 5V, R_IN and T_IN idle, no load 12 VCCB = 3.3V, R_IN and T_IN idle, no load 10 mA Undervoltage-Lockout Threshold VUVLO VCCA - VGNDA (Note 2) 2.0 V Undervoltage-Lockout Hysteresis VUVLOHYS VCCA - VGNDA (Note 2) 0.1 V INPUT INTERFACE (T_IN, R_IN) T_IN relative to GNDA 0.8 R_IN relative to GNDB, TA = 25ºC, Input Low Voltage VIL 0.6 VCC = 3.3V R_IN relative to GNDB, TA = 25ºC, 0.8 VCC = 5V T_IN relative to GNDA Input High Voltage VIH R_IN relative to GNDB, VCCB = 3.3V and 5V, TA = 25°C V 0.7 x VCCA V 2.4 Transmitter Input Hysteresis (T_IN) 0.5 V Receiver Input Hysteresis (R_IN) 0.5 V Transmitter Input Leakage (T_IN) Input Resistance (R_IN) TA = 25ºC 3 5 ±1 μA 7 kΩ 0.8 V RECEIVER OUTPUT INTERFACE (R_OUT) Output Low Voltage VOL Output High Voltage VOH R_OUT relative to GNDA, sink current = 4mA R_OUT relative to GNDA, source current = 4mA VCCA 0.4 Output Short-Circuit Current V ±110 mA TRANSMITTER OUTPUT (T_OUT) Output Voltage Swing www.maximintegrated.com T_OUT loaded with 3kΩ to GNDB ±5 V Maxim Integrated | 3 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors Electrical Characteristics (continued) (VCCA - VGNDA = 3.0V to 5.5V, VCCB - VGNDB = 3.0V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCCA - VGNDA = 3.3V, VCCB - VGNDB = 3.3V, VGNDA = VGNDB, and TA = +25°C. (Note 1), Limits are 100% tested at TA = +25°C. Limits over the operating temperature range and relevant supply voltage range are guaranteed by design and characterization. Specifications marked "GBD" are guaranteed by design and not production tested.) PARAMETER SYMBOL Output Resistance CONDITIONS VCCB = 0V, transmitters = ±2V MIN TYP 300 10M Output Short-Circuit Current Output Leakage Current VCCB = 0V, VOUT = ±12V MAX UNITS Ω ±70 mA ±25 μA ESD AND ISOLATION PROTECTION ESD for R_IN, T_OUT Isolation Voltage VISO Working Isolation Voltage VIOWM IEC 61000-4-2 Air Discharge ±12 IEC 61000-4-2 Contact Discharge ±6 ESD Human Body Model JEDEC JS-001-2014 ±15 t = 60s (Note 3) 600 VRMS > 50 years (Note 3) 200 VRMS kV TIMING CHARACTERISTICS Maximum Data Rate Receiver Propagation Delay VCCB = 5V, RL = 3kΩ, CL = 1000pF tPHL, tPLH 1000 R_IN to R_OUT, CL = 150pF kbps 0.15 μs Transmitter Skew | tPHL - tPLH | (Note 4) 35 ns Receiver Skew | tPHL - tPLH | 60 ns Transition-Region Slew Rate VCCA = VCCB = 3.3V, TA = +25C, RL = 3k to 7k, CL = 150pF to 1000pF, measured from +3V to -3V or -3V to +3V 24 150 V/μs Note 1: All units are production tested at TA = 25°C. Specifications over temperature are guaranteed by design. All voltages of side A are referenced to GNDA. All voltages of side B are referenced to GNDB. Note 2: The undervoltage lockout threshold and hysteresis guarantee that the outputs are in a known state when the supply voltage dips. Note 3: The isolation is guaranteed by design and not production tested. Note 4: Transmitter skew is measured at the transmitter zero cross points. www.maximintegrated.com Maxim Integrated | 4 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors Typical Operating Characteristics (VDD = 5V, VL = 3.3V, RL = 60Ω, CL = 15pF, TA = +25°C, unless otherwise noted.) www.maximintegrated.com Maxim Integrated | 5 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors Typical Operating Characteristics (continued) (VDD = 5V, VL = 3.3V, RL = 60Ω, CL = 15pF, TA = +25°C, unless otherwise noted.) www.maximintegrated.com Maxim Integrated | 6 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors Pin Configurations MAX33250E VCCA VCCB T1IN T1OUT T2IN T2OUT R1OUT R1IN R2OUT R2IN GNDA GNDB 6mm x 6mm LGA www.maximintegrated.com Maxim Integrated | 7 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors MAX33251E VCCA VCCB T1IN T1OUT NC NC R1OUT R1IN NC NC GNDA GNDB 6mm x 6mm LGA Pin Description PIN MAX3325 0E MAX3325 1E NAME FUNCTION 1 1 VCCA Supply Voltage of Logic Side A. Bypass VCCA with a 0.1μF ceramic capacitor to GNDA 2 2 T1IN TTL/CMOS Transmitter Input 1 3 --- T2IN TTL/CMOS Transmitter Input 2 4 4 R1OUT TTL/CMOS Receiver Output 1 5 --- R2OUT TTL/CMOS Receiver Output 2 6 6 GNDA Ground for Logic Side A 7 7 GNDB Ground for Field Side B 8 --- R2IN RS-232 Receiver Input 2 RS-232 Receiver Input 1 9 9 R1IN 10 --- T2OUT RS-232 Transmitter Output 2 11 11 T1OUT RS-232 Transmitter Output 1 12 12 VCCB www.maximintegrated.com Supply Voltage of Logic Side B. Bypass VCCB with a 0.1μF ceramic capacitor to GNDB Maxim Integrated | 8 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors Detailed Description The MAX33250E and MAX33251E are 1Mbps, 600VRMS isolated RS-232 transceivers. The MAX33250E has 2 transmitters and 2 receivers (2Tx/2Rx), and the MAX33251E has 1 transmitter and 1 receiver (1Tx/1Rx). The isolation is provided by Maxim’s proprietary insulation material that can withstand 600VRMS for 60 seconds. The MAX33250E and MAX33251E conform to the EIA/TIA-232 standard and operates at data rates up to 1Mbps over the temperature range of -40ºC to 85ºC. Digital Isolation The MAX33250E and MAX33251E provide galvanic isolation and protection for digital signals from the local microcontroller’s logic UART port (primary side) to the field lines (secondary side). A capacitive design is utilized where the insulation material for the isolation barrier is rated for 600VRMS withstand voltage (VISO) for 60 seconds. The same material can also be exposed to a differential of 200VRMS of working voltage (VIOWM) for more than 50 years, providing longevity for many different types of end equipment. The isolation barrier also breaks ground loops and level translation for two different systems where it could potentially create inadvertent or misinterpret data signals. Dual Charge Pump Voltage Converter and Inverter Both parts have internal RS-232 power supplies that consist of a regulated dual charge pump that provides output voltages of +5.5V (doubling charge pump) and -5.5V (inverting charge pump), over the +3.0V to +5.5V range. Each charge pump is internally connected to a pair of flying capacitors and a pair of reservoir capacitors to generate the internal V+ and V- supplies, as shown in Typical Application Diagram. Startup and Undervoltage Lockout The VCCA and VCCB supplies are both internally monitored for undervoltage conditions. Undervoltage events can occur during power-up, power-down, or during normal operation due to a dip in either power supply line. When an undervoltage event is detected on either of the supplies, all outputs on both sides are automatically controlled, regardless of the status of the inputs. Table 1. Output Control Truth Table INPUTS VCCA VCCB RxOUT TxOUT RxIN = 1 Undervoltage RxIN = 0 Undervoltage Powered High --- Powered Follows VCCA --- TxIN = 1 TxIN = 0 Undervoltage Powered — Low Undervoltage Powered — Low RxIN = 1 Powered Undervoltage High --- RxIN = 0 Powered Undervoltage High --- TxIN = 1 Powered Undervoltage — *Low TxIN = 0 Powered Undervoltage — *Low *TxOUT will be out of compliance with the RS-232 specification as VCCB falls below 2.9V. www.maximintegrated.com Maxim Integrated | 9 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors RS-232 Transmitters The transmitters are inverting level translators that convert CMOS-logic levels from the UART or equivalent output port to +5V EIA/TIA-232 levels. The two devices guarantee 1Mbps with worst-case loads of 3kΩ in parallel with 1000pF, providing compatibility with PC-to-PC communication software. Transmitters can be paralleled to drive multiple receivers. RS-232 Receivers The receivers convert RS-232 signals to CMOS-logic output levels to the UART or equivalent input port. The devices feature inverting outputs that always remain active. Power Supply Decoupling To reduce ripple and the chance of introducing data errors, bypass VCCA and VCCB with 0.1μF ceramic capacitors to GNDA and GNDB, respectively. Place the bypass capacitors as close to the power-supply input pins as possible. www.maximintegrated.com Maxim Integrated | 10 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors Insulation and Safety Characteristics PARAMETER SYMBOL CONDITIONS VALUE UNIT 4.4 mm IEC INSULATION AND SAFETY RELATED FOR SPECIFICATIONS External Tracking (Creepage) CPG IEC 60664-1 External Air Gap (Clearance) CLR IEC 60664-1 Minimum Internal Gap 4.4 mm 0.0026 mm IEC 112/VDE 030 Part 1 175 V 1 GΩ f = 1MHz 12 pF 1 kVPEAK Insulation Thickness Tracking Resistance (Comparative Tracking Index) CTI Insulation Resistance Across Barrier RISO Capacitance Across Isolation Barrier CIO VDE IEC INSULATION CHARACTERISTICS Surge Isolation Voltage VIOSM IEC 60747-17, section 5.3.1.6 and 5.4.6 for basic insulation Repetitive Peak Isolation Voltage VIORM IEC 60747-17, section 5.3.1.3 282 kVPEAK Rated Transient Isolation Voltage VIOTM IEC 60747-17, section 5.3.1.4 850 kVPEAK TS IEC 60747-17, section 7.2.1 150 °C PSA IEC 60747-17, section 7.2.1 0.75 W PSB IEC 60747-17, section 7.2.1 0.75 W qpd Safety Limiting Temperature Safety Limiting Dissipation Side A Power Safety Limiting Dissipation Side B Power Apparent Charge Method IEC 60747-17, section 7.4 method a and b 5 pC Overvoltage Category IEC 60664-1, single or three phase 50V DC or AC I,II — Overvoltage Category IEC 60664-1, single or three phase 100V DC or AC Climatic Category Pollution Degree www.maximintegrated.com DIN VDE 0110 I — 40/125/21 — 2 — Maxim Integrated | 11 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors Typical Application Circuit C1 C3 C2 C4 V- V+ VOLTAGE DOUBLER VOLTAGE INVERTER VCCB VCCA 0.1µF 0.1µF LOGIC LEVELS TX RTS RX T1IN T1OUT T2IN T2OUT R1OUT R1IN PERIPHERALS RS-232 LEVELS TX CTS RX 5K CTS R2OUT R2IN RTS 5K GNDA www.maximintegrated.com GNDB Maxim Integrated | 12 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors Ordering Information TEMPERATURE CHANNEL- RANGE CONFIGURATION DATA RATE PIN-PACKAGE MAX33250EELC+ -40°C to +85°C 2 Transmitters, 2 Receivers 1Mbps 12 (6mm x 6mm) LGA MAX33251EELC+ -40°C to +85°C 1 Transmitter, 1 Receiver 1Mbps 12 (6mm x 6mm) LGA PART NUMBER +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape-and-reel. www.maximintegrated.com Maxim Integrated | 13 MAX33250E/MAX33251E 600V Isolated 2Tx/2Rx and 1Tx/1Rx RS-232 Transceiver with ±15kV ESD and Integrated Capacitors Revision History REVISION NUMBER REVISION DATE 0 9/18 Initial release — 1 11/18 Updated Ordering Information 13 DESCRIPTION PAGES CHANGED For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. 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