EVALUATION KIT AVAILABLE MAX14850 Six-Channel Digital Isolator General Description The MAX14850 is a six-channel digital isolator utilizing Maxim's proprietary process technology, whose monolithic design provides a compact and low-cost transfer of digital signals between circuits with different power domains. The technology enables low power consumption and stable high-temperature performance. The four unidirectional channels are each capable of DC to 50Mbps, with two of the four channels passing data across the isolation barrier in each direction. The two bidirectional channels are open-drain; each capable of data rates from DC to 2Mbps. Independent 3.0V to 5.5V supplies on each side of the isolator also make it suitable for use as a level translator. The MAX14850 can be used for isolating SPI buses, I2C buses, RS-232, RS-485/RS-422 buses, and general-purpose isolation. When used as a bus isolator, extra channels are available for power monitoring and reset signals. Benefits and Features Protection from High-Voltage Environments * 600VRMS Isolation for 60 Seconds * Short-Circuit Protection on Unidirectional Outputs * 200VRMS Working Isolation Voltage for 50 Years Complete Digital Isolation Solution * Four Unidirectional Signal Paths: 2-In/2-Out * Two Bidirectional Open-Drain Signal Paths * 50Mbps (max) Unidirectional Data Rate * 2Mbps (max) Bidirectional Data Rate Compatible with Many Interface Standards * I2C * SPI * RS-232, RS-422/RS-485 * SMBus, PMBus Interfaces Ordering Information appears at end of data sheet. The MAX14850 is available in a narrow body,16-pin SOIC (10mm x 4mm) package (for which an evaluation kit is available) and 16-pin QSOP (3.9mm x 4.94mm) package. The packages are specified over the -40NC to +125NC automotive temperature range. Applications Industrial Control Systems I2C, SPI, SMBus, PMBusK Interfaces Isolated RS-232, RS-485/RS-422 Telecommunication Systems Battery Management Medical Systems Typical Operating Circuits 0.1F 3.3V 0.1F VCCA RPUA RPUA VCCB MAX14850 RPUB RPUB GPIO1 I/OA1 I/OB1 RST GPIO2 I/OA2 I/OB2 CS C SCLK INA1 OUTB1 SCLK ADC MOSI INA2 OUTB2 MOSI MISO OUTA1 INB1 MISO OUTA2 INB2 GPIO3 VCCB MONITOR GNDA PMBus is a trademark of SMIF, Inc. 5V GNDB 600VRMS ISOLATION For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated's website at www.maximintegrated.com. 19-6161; Rev 2; 11/14 MAX14850 Six-Channel Digital Isolator Absolute Maximum Ratings VCCA to GNDA.........................................................-0.3V to +6V VCCB to GNDB.........................................................-0.3V to +6V OUTA1, OUTA2 to GNDA...................... -0.3V to (VCCA + 0.3V) OUTB1, OUTB2 to GNDB...................... -0.3V to (VCCB + 0.3V) INB1, INB2, I/OA1, I/OA2 to GNDA.........................-0.3V to +6V INA1, INA2, I/OB1, I/OB2 to GNDB.........................-0.3V to +6V Short-Circuit Duration (OUTA_ to GNDA or VCCA, OUTB_ to GNDB or VCCB)..........................Continuous Continuous Current (I/OA_, I/OB_) Pin............................. Q50mA Package Thermal Characteristics Continuous Power Dissipation (TA = +70NC) SOIC (derate 13.3mW/NC above +70NC)...............1067mW QSOP (derate 9.6mW/NC above +70NC)..............771.5mW Operating Temperature Range......................... -40NC to +125NC Junction Temperature......................................................+150NC Storage Temperature Range............................. -65NC to +150NC Lead Temperature (soldering, 10s).................................+300NC Soldering Temperature (reflow).......................................+260NC (Note 1) SOIC Junction-to-Ambient Thermal Resistance (BJA)...........75NC/W Junction-to-Case Thermal Resistance (BJC)................24NC/W QSOP Junction-to-Ambient Thermal Resistance (BJA)......103.7NC/W Junction-to-Case Thermal Resistance (BJC)................37NC/W Note 1: 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. 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. Electrical Characteristics (VCCA - VGNDA = 3.0V to 5.5V, VCCB - VGNDB = 3.0V to 5.5V, TA = -40C to +125C, unless otherwise noted. Typical values are at VCCA - VGNDA = 3.3V, VCCB - VGNDB = 3.3V, and TA = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT DC CHARACTERISTICS Supply Voltage VCCA Relative to GNDA 3.0 5.5 VCCB Relative to GNDB 3.0 5.5 Unidirectional inputs at DC or 2Mbps; bidirectional inputs at DC or switching at 2Mbps, no load Supply Current ICCA, ICCB All inputs switching at max data rate. No load. (Note 3) VCCA = +5V, VCCB = +5V 7.2 11 VCCA = +3.3V, VCCB = +3.3V 6.2 9.5 VCCA = +5V, VCCB = +5V TA = +25C 15 22 TA = +125C 17 24 VCCA = +3.3V, VCCB = +3.3V TA = +25C 10 16 TA = +125C 11 18 V mA Undervoltage-Lockout Threshold VUVLO VCCA - VGNDA, VCCB - VGNDB (Note 4) 2 V Undervoltage-Lockout Hysteresis VUVLOHYS VCCA - VGNDA, VCCB - VGNDB (Note 4) 0.1 V Maxim Integrated 2 MAX14850 Six-Channel Digital Isolator ELECTRICAL CHARACTERISTICS (continued) (VCCA - VGNDA = 3.0V to 5.5V, VCCB - VGNDB = 3.0V to 5.5V, TA = -40C to +125C, unless otherwise noted. Typical values are at VCCA - VGNDA = 3.3V, VCCB - VGNDB = 3.3V, and TA = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNIT ISOLATION CHARACTERISTICS Isolation Voltage Working Isolation Voltage VISO VIOWM ESD Protection t = 60s (Note 5) 600 VRMS VGNDB - VGNDA continuous (Note 3), 50-year life expectancy (Figure 4) 200 All pins 2.5 VRMS kV LOGIC INPUTS AND OUTPUTS Input Threshold Voltage Input Logic-High Voltage VIT VIH I/OA1, I/OA2, relative to GNDA Output Logic-High Voltage Output Logic-Low Voltage VIL VOH VOL 0.7 INA1, INA2, relative to GNDA 0.7 x VCCA INB1, INB2, relative to GNDB 0.7 x VCCB I/OA1, I/OA2, relative to GNDA I/OB1, I/OB2, relative to GNDB Input Logic-Low Voltage 0.5 Input Capacitance DVTOL CIN V 0.7 0.7 x VCCB INA1, INA2, relative to GNDA 0.8 INB1, INB2, relative to GNDB 0.8 I/OA1, I/OA2, relative to GNDA 0.5 I/OB1, I/OB2, relative to GNDB 0.3 x VCCB OUTA1, OUTA2, relative to GNDA, source current = 4mA VCCA - 0.4 OUTB1, OUTB2, relative to GNDB, source current = 4mA VCCB - 0.4 0.8 OUTB1, OUTB2, relative to GNDB, sink current = 4mA 0.8 I/OA1, I/OA2, relative to GNDA, sink current = 10mA 0.6 0.9 I/OA1, I/OA2, relative to GNDA, sink current = 0.5mA 0.6 0.85 I/OA1, I/OA2 (Note 6) INA1, INA2, INB1, INB2, f = 1MHz V V OUTA1, OUTA2, relative to GNDA, sink current = 4mA I/OB1, I/OB2, relative to GNDB, sink current = 30mA Input/Output Logic-Low Threshold Difference V V 0.4 50 mV 2 pF 1.5 kV/Fs DYNAMIC SWITCHING CHARACTERISTICS Common-Mode Transient Immunity Maxim Integrated dVISO/dt VIN = VCC_ or VGND_ (Notes 3, 7) 3 MAX14850 Six-Channel Digital Isolator ELECTRICAL CHARACTERISTICS (continued) (VCCA - VGNDA = 3.0V to 5.5V, VCCB - VGNDB = 3.0V to 5.5V, TA = -40C to +125C, unless otherwise noted. Typical values are at VCCA - VGNDA = 3.3V, VCCB - VGNDB = 3.3V, and TA = +25C.) (Note 2) PARAMETER SYMBOL Maximum Data Rate (Note 3) DRMAX Minimum Pulse Width PWMIN CONDITIONS 50 I/OA1 to I/OB1, I/OA2 to I/OB2, I/OB1 to I/OA1, I/OB2 to I/OA2 2 INA1 to OUTB1, INA2 to OUTB2, INB1 to OUTA1, INB2 to OUTA2 (Note 3) 20 Pulse-Width Distortion |tDPLH - tDPHL| (Notes 3, 8) Maxim Integrated tDPLH tDPHL PWD TYP MAX UNIT Mbps ns VCCA = VCCB = +3.3V 20 30 VCCA = VCCB = +5V 18 26 I/OA1 to I/OB1, I/OA2 to I/OB2, R1 = 1.6kI, R2 = 180I, CL1 = CL2 = 15pF, Figure 2 VCCA = VCCB = +3.3V 30 100 VCCA = VCCB = +5V 30 100 I/OB1 to I/OA1, I/OB2 to I/OA2, R1 = 1kI, R2 = 120I, CL1 = CL2 = 15pF, Figure 2 VCCA = VCCB = +3.3V 60 100 VCCA = VCCB = +5V 60 100 INA1 TO OUTB1, INA2 TO OUTB2, INB1 TO OUTA1, INB2 TO OUTA2, RL = 1MI, CL = 15pF, Figure 1 VCCA = VCCB = +3.3V 7 VCCA = VCCB = +5V 7 I/OA1 to I/OB1, I/OA2 to I/OB2, R1 = 1.6kI, R2 = 180I, CL1 = CL2 = 15pF, Figure 2 VCCA = VCCB = +3.3V 12 VCCA = VCCB = +5V 12 I/OB1 to I/OA1, I/OB2 to I/OA2, R1 = 1kI, R2 = 120I, CL1 = CL2 = 15pF, Figure 2 VCCA = VCCB = +3.3V 60 VCCA = VCCB = +5V 50 INA1 to OUTB1, INA2 to OUTB2, INB1 to OUTA1, INB2 to OUTA2, RL = 1MI, CL = 15pF, Figure 1 Propagation Delay (Note 3) MIN INA1 to OUTB1, INA2 to OUTB2, INB1 to OUTA1, INB2 to OUTA2 ns ns 4 MAX14850 Six-Channel Digital Isolator ELECTRICAL CHARACTERISTICS (continued) (VCCA - VGNDA = 3.0V to 5.5V, VCCB - VGNDB = 3.0V to 5.5V, TA = -40C to +125C, unless otherwise noted. Typical values are at VCCA - VGNDA = 3.3V, VCCB - VGNDB = 3.3V, and TA = +25C.) (Note 2) PARAMETER SYMBOL CONDITIONS OUTB1 to OUTB2 output skew, Figure 1 OUTA1 to OUTA2 output skew, Figure 1 Channel-to-Channel Skew (Notes 3, 8) tDSKEWCC I/OB1 to I/OB2 output skew, Figure 2 I/OA1 to I/OA2 output skew, Figure 2 Part-to-Part Skew (Notes 3, 8) tDSKEWPP Rise Time (Note 3) tR Fall Time (Note 3) Maxim Integrated tF MIN TYP MAX VCCA = VCCB = +3.3V 3 VCCA = VCCB = +5V 3 VCCA = VCCB = +3.3V 3 VCCA = VCCB = +5V 3 VCCA = VCCB = +3.3V 6 VCCA = VCCB = +5V 5 VCCA = VCCB = +3.3V 20 VCCA = VCCB = +5V 20 UNIT ns DtDPLH, DtDPHL 8 ns OUTA1, OUTA2, OUTB1, OUTB2, 10% to 90%, Figure 1 5 ns OUTA1, OUTA2, OUTB1, OUTB2, 90% to 10%, Figure 1 5 I/OA1, I/OA2, 90% to 10%, R1 = 1.6kW, R2 = 180W, CL1 = CL2 = 15pF, Figure 2 VCCA = VCCB = +3.3V 30 60 VCCA = VCCB = +5V 40 80 I/OB1, I/OB2, 90% to 10%, R1 = 1kW, R2 = 120W, CL1 = CL2 = 15pF, Figure 2 VCCA = VCCB = +3.3V 3 6 VCCA = VCCB = +5V 3 5 ns 5 MAX14850 Six-Channel Digital Isolator INSULATION AND SAFETY CHARACTERISTICS PARAMETER SYMBOL CONDITIONS VALUE UNIT 4.2 3.81 4.2 3.81 0.0026 mm mm mm mm mm 175 V 1 GI f = 1MHz 12 pF 1 kVpeak IEC INSULATION AND SAFETY RELATED FOR SPECIFICATIONS FOR SOIC-16 External Tracking (Creepage) CPG IEC 60664-1 External Air Gap (Clearance) CLR IEC 60664-1 Minimum Internal Gap SOIC-16 QSOP-16 SOIC-16 QSOP-16 Insulation Thickness Tracking Resistance (Comparative Tracking Index) CTI Insulation Resistance Across Barrier RISO Capacitance Across Isolation Barrier CIO IEC 112 / VDE 030 Part 1 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 Vpeak Rated Transient Isolation Voltage VIOTM IEC 60747-17, section 5.3.1.4 850 Vpeak Safety Limiting Temperature TS IEC 60747-17, section 7.2.1 150 NC Safety Limiting Side A Power Dissipation PSA IEC 60747-17, section 7.2.1 0.75 W Safety Limiting Side B Power Dissipation PSB IEC 60747-17, section 7.2.1 0.75 W Apparent Charge Method qpd IEC 60747-17, section 7.4, method a & 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 DIN VDE 0110, Table 1 I -- 40/125/21 -- 2 -- Note 2: All units are production tested at TA = +25C. 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, unless otherwise noted. Note 3: Guaranteed by design. Not production tested. Note 4: The undervoltage lockout threshold and hysteresis guarantee that the outputs are in a known state during a slump in the supplies. See the Detailed Description section for more information. Note 5: The isolation is guaranteed for t = 60s, and tested at 120% of the guaranteed value for 1s. Note 6: DVTOL = VOL - VIL. This is the minimum difference between the output logic-low voltage and the input logic threshold for the same I/O pin. This ensures that the I/O channels are not latched low when any of the I/O inputs are driven low (see the Bidirectional Channels section). Note 7: The common-mode transient immunity guarantees that the device will hold its outputs stable when the isolation voltage changes at the specified rate. Note 8: Pulse-width distortion is defined as the difference in propagation delay between low-to-high and high-to-low transitions on the same channel. Channel-to-channel skew is defined as the difference in propagation delay between different channels on the same device. Part-to-part skew is defined as the difference in propagation delays (for unidirectional channels) between different devices, when both devices operate with the same supply voltage, at the same temperature and have identical package and test circuits. Maxim Integrated 6 MAX14850 Six-Channel Digital Isolator Test Circuits/Timing Diagrams VCCA INA1, INA2 50% GNDA VCCA 0.1F VCCA 0.1F VCCB 50% tDPLH VCCB tDPHL VCCB MAX14850 50 OUTB1 INA_ TEST SOURCE OUTB_ GNDA 50% 50% GNDB GNDB RL CL tDSKEWCC VCCB 90% 50% OUTB2 (A) 10% GNDB tR tF (B) Figure 1. Test Circuit (A) and Timing Diagram (B) for Unidirectional Channels VCCA R1 0.1F I/OA_ CL1 0.1F VCCB VCCA R2 VCCB MAX14850 I/OB_ GNDA CL2 GNDB TEST SOURCE (A) VCCA I/OA1, I/OA2 VCCB 50% GNDA I/OB1, I/OB2 50% GNDB tDPLH tDPHL VCCB 50% I/OB1 VOL(min) 50% tDPHL VOL(min) 90% I/OA2 tF 10% 50% tDSKEWCC VCCA 50% VOL(min) tDPLH 50% I/OA1 90% I/OB2 50% VCCA tDSKEWCC VCCB 50% 50% VOL(min) (B) tF 10% (C) Figure 2. Test Circuit (A) and Timing Diagrams (B) and (C) for Bidirectional Channels Maxim Integrated 7 MAX14850 Six-Channel Digital Isolator Typical Operating Characteristics (VCCA - VGNDA = 3.3V, VCCB - VGNDB = 3.3V, all inputs idle, TA = +25NC, unless otherwise noted. ICCB vs. DATA RATE 7 5 5 4 INB1/INB2 SWITCHING 5 4 INA1/INA2 SWITCHING 3 2 2 1 1 0 0.001 0 0.001 0.1 1 10 100 0.01 6 9 TA = -40C 8 10 100 2 1 PULLUP = 2k TA = +125C 9 0.1 1 5 TA = +25C 4 2 1 1 0 3.0 3.5 4.5 5.0 5.5 3.0 3.5 5 5 ICCB VCCA = 5V 4 5.0 5 4 5.5 2 3 2 VCCA = 3.3V 3 2 4.5 OUTA_ VOL vs. SINK CURRENT VCCA = 3.3V 3 4.0 VCCB (V) OUTA_ VOH vs. SOURCE CURRENT 6 4 4.0 VCCA (V) OUTA_ VOH (V) 7 TA = -40C TA = -40C 4 3 0 MAX14850 toc07 ICCA 5 2 ICC vs.TEMPERATURE 8 6 3 DATA RATE (Mbps) 9 10 7 6 10 1 TA = +125C 8 OUTA_ VOL (V) 0.01 0.1 ICCB vs. VCCB ICCB (mA) I/OA1/I/OA2 SWITCHING 3 0 0.001 0.01 10 MAX14850 toc08 4 PULLUP = 2k DATA RATE (Mbps) 7 ICCA (mA) ICCB (mA) 1 10 MAX14850 toc04 7 ICC (mA) 0.1 0 0.001 ICCA vs. VCCA ICCB vs. DATA RATE I/OB1/I/OB2 SWITCHING 3 DATA RATE (Mbps) 8 I/OB1/I/OB2 SWITCHING 1 DATA RATE (Mbps) 5 4 MAX14850 toc09 0.01 I/OA1/I/OA2 SWITCHING 2 MAX14850 toc05 3 ICCA (mA) 6 ICCB (mA) ICCA (mA) 6 6 MAX14850 toc06 7 INB1/INB2 SWITCHING 8 7 MAX14850 toc02 MAX14850 toc01 INA1/INA2 SWITCHING 8 ICCA vs. DATA RATE 9 MAX14850 toc03 ICCA vs. DATA RATE 9 1 1 VCCA = 5V 1 0 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 TEMPERATURE (C) Maxim Integrated 0 0 15 30 45 ISOURCE (mA) 60 75 0 15 30 45 60 75 ISINK (mA) 8 MAX14850 Six-Channel Digital Isolator Typical Operating Characteristics (continued) (VCCA - VGNDA = 3.3V, VCCB - VGNDB = 3.3V, all inputs idle, TA = +25NC, unless otherwise noted. VCCB = 3.3V 2 1 3 VCCB = 3.3V 2 14 PROPAGATION DELAY (ns) 4 OUTB_ VOL (V) 4 16 MAX14850 toc11 VCCB = 5V OUTB_ VOH (V) 5 MAX14850 toc10 5 3 PROPAGATION DELAY vs. SUPPLY VOLTAGE OUTB_ VOL vs. SINK CURRENT 1 VCCB = 5V VGNDB - VGNDA = 0V VGNDB - VGNDA = -100V 12 10 8 VGNDB - VGNDA = +100V 6 4 VDDA = VDDB INA_ TO OUTB_ LOW TO HIGH TRANSITION 2 0 0 15 30 45 60 75 3.0 3.5 4.0 4.5 5.0 6 4 VDDA = VDDB INA_ TO OUTB_ HIGH TO LOW TRANSITION 0 3.5 4.0 4.5 5.0 12 HIGH TO LOW 10 8 6 4 2 5.5 0 20 40 60 80 LOW TO HIGH 16 14 12 HIGH TO LOW 10 8 6 4 2 INA_ TO OUTB_ 0 MAX14850 toc15 MAX14850 toc14 LOW TO HIGH 14 INA_ TO OUTB_ 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 100 CL (pF) TA (C) PROPAGATION DELAY vs. SUPPLY VOLTAGE PROPAGATION DELAY vs. SUPPLY VOLTAGE PROPAGATION DELAY vs. CAPACITIVE LOAD VGNDB - VGNDA = -100V VGNDB - VGNDA = +100V 6 4 VDDA = VDDB INB_ TO OUTA_ LOW TO HIGH TRANSITION 2 0 3.5 4.0 4.5 VDDA (V) Maxim Integrated 5.0 5.5 VGNDB - VGNDA = -100V 10 8 VGNDB - VGNDA = +100V 6 4 VDDA = VDDB INB_ TO OUTA_ HIGH TO LOW TRANSITION 2 0 3.0 3.5 4.0 4.5 VDDA (V) 5.0 5.5 20 MAX14850 toc18 12 VGNDB - VGNDA = 0V 18 PROPAGATION DELAY (ns) MAX1960 toc16 VGNDB - VGNDA = 0V 10 12 MAX14850 toc17 VDDA (V) 16 5.5 18 PROPAGATION DELAY (ns) VGNDB - VGNDA = +100V 16 PROPAGATION DELAY (ns) 8 18 PROPAGATION DELAY (ns) PROPAGATION DELAY (ns) 0 75 PROPAGATION DELAY vs. TEMPERATURE 2 PROPAGATION DELAY (ns) 60 PROPAGATION DELAY vs.CAPACITIVE LOAD VGNDB - VGNDA = -100V 3.0 45 PROPAGATION DELAY vs. SUPPLY VOLTAGE 10 14 30 VDDA (V) VGNDB - VGNDA = 0V 3.0 15 ISINK (mA) 12 8 0 ISOURCE (mA) MAX14850 toc13 0 MAX1960 toc12 OUTB_ VOH vs. SOURCE CURRENT LOW TO HIGH 16 14 12 HIGH TO LOW 10 8 6 4 2 INB_ TO OUTA_ 0 0 20 40 60 80 100 CL (pF) 9 MAX14850 Six-Channel Digital Isolator Typical Operating Characteristics (continued) (VCCA - VGNDA = 3.3V, VCCB - VGNDB = 3.3V, all inputs idle, TA = +25NC, unless otherwise noted. 30 12 HIGH TO LOW 8 6 4 25 20 15 10 VDDA = VDDB I/OA_ TO I/OB_ LOW TO HIGH TRANSITION PULLUP = 1kI 5 2 INB_ TO OUTA_ 0 VGNDB - VGNDA = -100V VGNDB - VGNDA = 0V 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 3.0 TA (C) 3.5 4.0 4.5 5.0 VDDA = VDDB I/OA_ TO I/OB_ HIGH TO LOW TRANSITION 3.5 3.0 4.0 20 HIGH TO LOW VGNDB - VGNDA = +100V 20 VGNDB - VGNDA = 0V VGNDB - VGNDA = -100V 10 VDDA = VDDB I/OB_ TO I/OA_ LOW TO HIGH TRANSITION PULLUP = 1kI 5 0 3.0 3.5 4.0 4.5 5.0 VDDA (V) PROPAGATION DELAY vs. SUPPLY VOLTAGE PROPAGATION DELAY vs. TEMPERATURE 50 VGNDB - VGNDA = -100V VGNDB - VGNDA = 0V 30 20 VDDA = VDDB I/OB_ TO I/OA_ HIGH TO LOW TRANSITION 0 3.5 4.0 4.5 VDDA (V) 5.0 5.5 5.5 60 MAX14850 toc25 VGNDB - VGNDA = +100V 50 PROPAGATION DELAY (ns) MAX14850 toc24 TA (C) 10 5.5 15 -40 -25 -10 5 20 35 50 65 80 95 110 125 60 5.0 25 I/OA_ TO I/OB_ PULLUP = 1kI 0 4.5 30 10 PROPAGATION DELAY (ns) 5 VDDA (V) PROPAGATION DELAY (ns) MAX14850 toc22 PROPAGATION DELAY (ns) 30 Maxim Integrated 10 PROPAGATION DELAY vs. SUPPLY VOLTAGE LOW TO HIGH 3.0 VGNDB - VGNDA = 0V V GNDB - VGNDA = -100V VDDA (V) 50 40 15 0 5.5 PROPAGATION DELAY vs.TEMPERATURE 40 VGNDB - VGNDA = +100V MAX14850 toc23 10 20 MAX14850 toc21 14 VGNDB - VGNDA = +100V PROPAGATION DELAY (ns) LOW TO HIGH PROPAGATION DELAY (ns) PROPAGATION DELAY (ns) 35 MAX14850 toc19 18 16 PROPAGATION DELAY vs. SUPPLY VOLTAGE PROPAGATION DELAY vs. SUPPLY VOLTAGE MAX14850 toc20 PROPAGATION DELAY vs. TEMPERATURE 40 HIGH TO LOW 30 20 LOW TO HIGH 10 I/OB_ TO I/OA_ PULLUP = 1kI 0 -40 -25 -10 5 20 35 50 65 80 95 110 125 TA (C) 10 MAX14850 Six-Channel Digital Isolator Pin Configuration TOP VIEW + 16 VCCB VCCA 1 INA1 2 INA2 3 OUTA1 4 OUTA2 5 12 INB2 I/OA1 6 11 I/OB1 I/OA2 7 10 I/OB2 GNDA 8 9 15 OUTB1 MAX14850 14 OUTB2 13 INB1 GNDB SOIC/QSOP Pin Description PIN NAME FUNCTION VOLTAGE RELATIVE TO 1 VCCA Supply Voltage of Logic Side A. Bypass VCCA with a 0.1FF ceramic capacitor to GNDA. GNDA 2 INA1 Logic Input 1 on Side A. INA1 is translated to OUTB1. GNDA 3 INA2 Logic Input 2 on Side A. INA2 is translated to OUTB2. GNDA 4 OUTA1 Logic Output 1 on Side A. OUTA1 is a push-pull output. GNDA 5 OUTA2 Logic Output 2 on Side A. OUTA2 is a push-pull output. GNDA GNDA GNDA 6 I/OA1 Bidirectional Input/Output 1 on Side A. I/OA1 is translated to/from I/OB1 and is a open-drain output. 7 I/OA2 Bidirectional Input/Output 2 on Side A. I/OA2 is translated to/from I/OB2 and is a open-drain output. 8 GNDA Ground Reference for Side A -- 9 GNDB Ground Reference for Side B -- 10 I/OB2 Bidirectional Input/Output 2 on Side B. I/OB2 is translated to/from I/OA2 and is a open-drain output. Maxim Integrated GNDB 11 MAX14850 Six-Channel Digital Isolator Pin Description (continued) PIN NAME FUNCTION VOLTAGE RELATIVE TO 11 I/OB1 Bidirectional Input/Output 1 on Side B. I/OB1 is translated to/from I/OA1 and is a open-drain output. GNDB 12 INB2 Logic Input 2 on Side B. INB2 is translated to OUTA2. GNDB 13 INB1 Logic Input 1 on Side B. INB1 is translated to OUTA1. GNDB 14 OUTB2 Logic Output 2 on Side B. OUTB2 is a push-pull output. GNDB 15 OUTB1 Logic Output 1 on Side B. OUTB1 is a push-pull output. GNDB Supply Voltage of Logic Side B. Bypass VCCB with a 0.1FF ceramic capacitor to GNDB. GNDB 16 VCCB Functional Diagram VCCA Detailed Description VCCB MAX14850 INA1 OUTB1 INA2 OUTB2 INB1 OUTA1 600VRMS DIGITAL ISOLATOR OUTA2 INB2 I/OA1 I/OB1 I/OA2 I/OB2 GNDA GNDB The MAX14850 is a six-channel digital isolator. The device is rated for 600VRMS isolation voltage for 60 seconds. This digital isolator offers a low-power, low-cost, high electromagnetic interference (EMI) immunity, and stable temperature performance through Maxim's proprietary process technology. The device uses a monolithic solution to isolate different ground domains and block high-voltage/high-current transients from sensitive or human interface circuitry. Four of the six channels are unidirectional, two in each direction. All four unidirectional channels support data rates of up to 50Mbps. The other two channels are bidirectional with data rates up to 2Mbps. Isolation of I2C, SPI/MICROWIRE(R), and other serial busses can be achieved with the MAX14850. The device features two supply inputs, VCCA and VCCB, that independently set the logic levels on either side of the device. VCCA and VCCB are referenced to GNDA and GNDB, respectively. The MAX14850 features a refresh mode to ensure accuracy of data when the inputs are DC. Digital Isolation The MAX14850 provides galvanic isolation for digital signals that are transmitted between two ground domains. Up to 200VRMS of continuous isolation is supported as well as transient differences of up to 850V. MICROWIRE is a registered trademark of National Semiconductor Corporation. Maxim Integrated 12 MAX14850 Six-Channel Digital Isolator Ground Isolation/Level Shifting The MAX14850 tolerates a ground difference of 600VRMS. Therefore, VGNDA can be 850VDC higher or lower than VGNDB. In addition, the device translates logic levels when (VCCA-VGNDA) is higher or lower voltage than (VCCB-VGNDB), as long as each is within the valid 3.0V to 5.5V range. Unidirectional and Bidirectional Channels The MAX14850 operates both as a unidirectional device and bidirectional device simultaneously. Each unidirectional channel can only be used in the direction shown in the functional diagram. The bidirectional channels function without requiring a direction control input. Unidirectional Channels The device features four unidirectional channels that operate independently with guaranteed data rates from DC to 50Mbps. The output driver of each unidirectional channel is push-pull, eliminating the need for pullup resistors. The outputs are able to drive both TTL and CMOS logic inputs. Bidirectional Channels The device features two bidirectional channels that have open-drain outputs. The bidirectional channels do not require a direction control input. A logic-low on one side causes the corresponding pin on the other side to be pulled low while avoiding data latching within the device. The input logic-low threshold (VIT) of I/OA1 and I/OA2 are at least 50mV lower than the output logic-low voltages of I/ OA1 and I/OA2. This prevents an output logic-low on side A from being accepted as an input low and subsequently transmitted to side B, thus preventing a latching action. The I/OA1, I/OA2, I/OB1, and I/OB2 pins have open-drain outputs, requiring pullup resistors to their respective supplies for logic-high outputs. The output low voltages are guaranteed for sink currents of up to 30mA for side B, and 10mA for side A (see the Electrical Characteristics table). 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 slump in the supplies. 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. The bidirectional outputs become high impedance and are pulled high by the external pullup resistor on the open-drain output. The unidirectional outputs are pulled high internally to the voltage of the VCCA or VCCB supply during undervoltage conditions. When an undervoltage condition is detected on either supply, all unidirectional outputs are pulled to the supplies (Table 1). The bidirectional outputs are high impedance and pulled to the supplies by the external pullup resistors. Safety Regulatory Approvals The MAX14850ASE+ is safety certified by UL, CSA, and IEC 60747-5-2. Per UL1577, the MAX14850 is 100% tested at an equivalent VISO of 720VRMS for one second (see Table 2). Figure 3 shows the behavior of the outputs during powerup and power-down. MAX14850AEE+ has not been submitted for certification. Table 1. Output Behavior During Undervoltage Conditions VIN VCCA VCCB VOUTA_ VOUTB_ 1 Powered Powered 1 1 0 Powered Powered 0 0 X Under Voltage Powered X Powered Under Voltage Follows VCCA 1 1 Follows VCCB Table 2. Safety Regulatory Approvals (Pending) (MAX14850ASE+) SAFETY AGENCY STANDARD ISOLATION NUMBER FILE NUMBER UL UL1577 Recognized 600VRMS isolation voltage for 60 seconds E351759 VDE Approved to 60747-17 Basic insulation, 600VRMS for 60 seconds Pending Maxim Integrated 13 MAX14850 Six-Channel Digital Isolator LIFE EXPECTANCY vs. WORKING ISOLATION VOLTAGE 1000 VCCB 5V/div VOUTA_ VOUTB_ VI/OA_ VI/OB_ 400s/div WORKING LIFE - YEARS (LOG SCALE) VCCA 100 50 VIOWM = 200VRMS 10 1 0.1 0.001 0 100 200 300 400 500 600 700 800 WORKING ISOLATION VOLTAGE (VIOWM) - VRMS Figure 3. Undervoltage Lockout Behavior Figure 4. Life Expectancy vs. Working Isolation Voltage Applications Information Power Supply Sequencing Affect of Continuous Isolation on Lifetime High-voltage conditions cause insulation to degrade over time. Higher voltages result in faster degradation. Even the high-quality insulating material used in the MAX14850 can degrade over long periods of time with a constant high-voltage across the isolation barrier. Figure 4 shows the life expectancy of the MAX14850 vs. working isolation voltage. Maxim Integrated The MAX14850 does not require special power-supply sequencing. The logic levels are set independently on either side by VCCA and VCCB. Each supply can be present over the entire specified range regardless of the level or presence of the other. Power Supply Decoupling To reduce ripple and the chance of introducing data errors, bypass VCCA and VCCB with 0.1FF ceramic capacitors to GNDA and GNDB, respectively. Place the bypass capacitors as close to the power-supply input pins as possible. 14 MAX14850 Six-Channel Digital Isolator Typical Operating Circuits (continued) 0.1F 3.3V 0.1F VCCA RPUA C 5V VCCB RPUA RPUB MAX14850 RPUB SDA I/OA1 I/OB1 SDA SCL I/OA2 I/OB2 SCL INA1 OUTB1 INA2 OUTB2 GPIO1 GPIO2 GPIO3 VCCB MONITOR SPARE OUTA1 INB1 OUTA2 INB2 GNDA RESET LOAD DAC RST DAC LDAC GNDB 600VRMS ISOLATION Maxim Integrated 15 MAX14850 Six-Channel Digital Isolator Typical Operating Circuits (continued) 0.1F 3.3V 0.1F VCCA GPIO1 RTS I/OA2 I/OB2 INA1 OUTB1 RO DE MAX13085E A B DI OUTB2 INA2 VCCB MONITOR RE INB1 OUTA1 C TX RPUB I/OB1 I/OA1 RX GPIO3 VCCB MAX14850 RPUA 5V INB2 OUTA2 GNDA GNDB 600VRMS ISOLATION Ordering Information Chip Information PART TEMP RANGE PIN-PACKAGE MAX14850ASE+T -40NC to +125NC 16 SOIC MAX14850ASE+ -40NC to +125NC 16 SOIC MAX14850AEE+ -40NC to +125NC 16 QSOP MAX14850AEE+T -40NC to +125NC 16 QSOP + Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and Reel Maxim Integrated PROCESS: BiCMOS Package Information 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 TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 16 SOIC S16+3 21-0041 90-0097 16 QSOP E16+1 21-0055 90-0167 16 MAX14850 Six-Channel Digital Isolator Revision History REVISION NUMBER REVISION DATE 0 3/12 Initial release 1 5/14 Updated General Description, Benefits and Features, Bidirectional Channels section, Table 2, and Typical Operating Circuits 2 11/14 Added QSOP package and related information Added additional package and ordering information for QSOP DESCRIPTION PAGES CHANGED -- 1, 13, 15, 16 1, 2, 6, 11, 13, 16 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. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 (c) 2014 Maxim Integrated Products, Inc. 17 Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Maxim Integrated: MAX14850AEE+T MAX14850AEE+