MAX14855GWE+

MAX14855GWE+ Datasheet

MAX14853/MAX14855

Part	Datasheet
MAX14855GWE+	MAX14855GWE+ (pdf)

Related Parts	Information
MAX14853GWE+	MAX14853GWE+

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EVALUATION KIT AVAILABLE MAX14853/MAX14855 2.75kVRMS Isolated 500kbps/25Mbps Full-Duplex RS-485/RS-422 Transceivers with ±35kV ESD Protection and Integrated Transformer Driver The MAX14853/MAX14855 isolated RS-485/RS-422 transceivers provide 2750VRMS 60s of galvanic isolation between the cable-side RS-485/RS-422 driver/ receiver-side and the UART-side of the device. 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 MAX14853 or 25Mbps MAX14855 . The MAX14853/MAX14855 include an integrated 450kHz transformer driver for power transfer to the cable-side of the transceiver using an external transformer. An integrated LDO provides a simple and space-efficient architecture for providing power to the cable-side of the IC. The MAX14853/MAX14855 include one drive channel and one receive channel. The receiver is ¼-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 HBM . The MAX14853/MAX14855 are available in a wide body 16-pin SOIC package and operate over the -40°C to +105°C temperature range. ●● Industrial Automation Equipment ●● Programmable Logic Controllers ●● HVAC ●● Power Meters Safety Regulatory Approvals Pending ●● UL According to UL1577 ●● cUL According to CSA Bulletin 5A ●● VDE 0884-10 Benefits and Features ●● Higher Integration Simplifies Designs • Integrated LDO for Powering Cable-Side Ground • Integrated Transformer Driver for Power Transfer to Cable-Side Ground ●● High-Performance Transceiver Enables Flexible Designs • Compliant with RS-485 EIA/TIA-485 Standard • 500kpbs MAX14853 /25Mbps MAX14855 Maximum Data Rate • Up to 128 Devices on the Bus ●● Integrated Protection Ensures for Robust Communication • ±35kV ESD HBM on Driver Outputs/Receiver Inputs • 2.75kVRMS Withstand Isolation Voltage for 60s VISO • 630VPEAK Maximum Repetitive Peak Isolation Voltage VIORM • 445VRMS Maximum Working Isolation Voltage VIOWM • > 30 Years Lifetime at Rated Working Voltage • Withstands ±10kV Surge per IEC 61000-4-5 • Thermal Shutdown Functional Diagram VDDA TD1 TD2 VLDO XFMR DRIVER MAX14853 MAX14855 VDDB RXD B RS-485 TRANSCEIVER Ordering Information appears at end of data sheet. GNDA GNDB MAX14853/MAX14855 2.75kVRMS Isolated 500kbps/25Mbps Full-Duplex RS-485/RS-422 Transceivers with ±35kV ESD Protection and Integrated Transformer Driver Absolute Maximum Ratings VDDA to GNDA to +6V VDDB to +6V VLDO to +16V TD1, TD2 to GNDA to +12V TXD, DE, RE, RXD to GNDA ..................................-0.3V to +6V A, B, Y, Z to +13V TD1, TD2 Continuous Short-Circuit Duration RXD to GNDA, A, B, Y, Z, VDDB to Continuous Power Dissipation TA = +70°C 16-pin Wide SOIC derate 14.1mW/°C above +70°C .......................... 1126.8mW Operating Temperature Range.......................... -40°C to +105°C Junction Storage Temperature Range............................. -65°C to +150°C Lead Temperature soldering, 10s .................................. +300°C Soldering Temperature 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 Thermal Characteristics Note 1 Junction-to-Ambient Thermal Resistance Junction-to-Case Thermal Resistance 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 DC Electrical Characteristics VDDA - VGNDA = 3.0V to 5.5V, VDDB - VGNDB = 3.0V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDDA - VGNDA = 3.3V, VDDB - VGNDB = 3.3V, VGNDA = VGNDB, and TA = +25°C. Notes 2, 3 PARAMETER POWER CONDITIONS TYP MAX UNITS Supply Voltage Supply Current VDDA VDDB IDDA VDDA = 5V, DE = high, RE = TXD = low, RXD unconnected, no load, TD1/TD2 unconnected IDDB DE = high, RE = TXD = low, RXD unconnected, no load, VDDB = 3.3V Undervoltage Lockout Threshold Undervoltage Lockout Threshold Hysteresis TRANSFORMER DRIVER VUVLOA VUVLOB VUVHYSTA VUVHYSTB RE, RXD, DE, TXD TD1/TD2 driver RE, RXD, DE, TXD TD1/TD2 driver Output Resistance TD1/TD2 = low, IOUT = 300mA TD1, TD2 Current Limit Switching Frequency Duty Cycle ILIM 4.5V VDDA 5.5V 3.0V VDDA 3.6V 785 1300 Ordering Information PART TEMP RANGE PIN-PACKAGE MAX14853GWE+ -40°C to +105°C 16 SOIC W MAX14855GWE+ -40°C to +105°C 16 SOIC W MAX14853GWE+T -40°C to +105°C 16 SOIC W MAX14855GWE+T -40°C to +105°C 16 SOIC W +Denotes a lead Pb -free/RoHS-compliant package. T = Tape and Reel Chip Information PROCESS BiCMOS Package Information For the latest package outline information and land patterns footprints , go to 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 16 SOIC PACKAGE CODE W16M+10 OUTLINE NO. 21-0042 LAND PATTERN NO. 90-0107 Maxim Integrated 22 MAX14853/MAX14855 3/15 Initial release 2.75kVRMS Isolated 500kbps/25Mbps Full-Duplex RS-485/RS-422 Transceivers with ±35kV ESD Protection and Integrated Transformer Driver PAGES CHANGED For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at 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 and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 2015 Maxim Integrated Products, Inc. 23

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EVALUATION KIT AVAILABLE

MAX14853/MAX14855
2.75kVRMS Isolated 500kbps/25Mbps Full-Duplex RS-485/RS-422 Transceivers with ±35kV ESD Protection and Integrated Transformer Driver

The MAX14853/MAX14855 isolated RS-485/RS-422 transceivers provide 2750VRMS 60s of galvanic isolation between the cable-side RS-485/RS-422 driver/ receiver-side and the UART-side of the device. 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 MAX14853 or 25Mbps MAX14855 .

The MAX14853/MAX14855 include an integrated 450kHz transformer driver for power transfer to the cable-side of the transceiver using an external transformer. An integrated LDO provides a simple and space-efficient architecture for providing power to the cable-side of the IC.

The MAX14853/MAX14855 include one drive channel and one receive channel. The receiver is ¼-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 HBM .

The MAX14853/MAX14855 are available in a wide body 16-pin SOIC package and operate over the -40°C to +105°C temperature range.
●● Industrial Automation Equipment ●● Programmable Logic Controllers ●● HVAC ●● Power Meters

Safety Regulatory Approvals Pending
●● UL According to UL1577 ●● cUL According to CSA Bulletin 5A ●● VDE 0884-10

Benefits and Features
●● Higher Integration Simplifies Designs
• Integrated LDO for Powering Cable-Side Ground
• Integrated Transformer Driver for Power Transfer to Cable-Side Ground
●● High-Performance Transceiver Enables Flexible Designs
• Compliant with RS-485 EIA/TIA-485 Standard
• 500kpbs MAX14853 /25Mbps MAX14855 Maximum Data Rate
• Up to 128 Devices on the Bus
●● Integrated Protection Ensures for Robust Communication
• ±35kV ESD HBM on Driver Outputs/Receiver Inputs
• 2.75kVRMS Withstand Isolation Voltage for 60s VISO
• 630VPEAK Maximum Repetitive Peak Isolation Voltage VIORM
• 445VRMS Maximum Working Isolation Voltage VIOWM
• > 30 Years Lifetime at Rated Working Voltage
• Withstands ±10kV Surge per IEC 61000-4-5
• Thermal Shutdown

Functional Diagram

VDDA

TD1 TD2

VLDO

XFMR

DRIVER

MAX14853 MAX14855

VDDB

RXD B

RS-485 TRANSCEIVER
Ordering Information appears at end of data sheet.

GNDA

GNDB

MAX14853/MAX14855
2.75kVRMS Isolated 500kbps/25Mbps Full-Duplex RS-485/RS-422 Transceivers with ±35kV ESD Protection and Integrated Transformer Driver

Absolute Maximum Ratings

VDDA to GNDA to +6V VDDB to +6V VLDO to +16V TD1, TD2 to GNDA to +12V TXD, DE, RE, RXD to GNDA ..................................-0.3V to +6V A, B, Y, Z to +13V TD1, TD2 Continuous Short-Circuit Duration RXD to GNDA, A, B, Y, Z,

VDDB to

Continuous Power Dissipation TA = +70°C 16-pin Wide SOIC derate 14.1mW/°C above +70°C .......................... 1126.8mW

Operating Temperature Range.......................... -40°C to +105°C Junction Storage Temperature Range............................. -65°C to +150°C Lead Temperature soldering, 10s .................................. +300°C Soldering Temperature

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 Thermal Characteristics Note 1

Junction-to-Ambient Thermal Resistance

Junction-to-Case Thermal Resistance

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

DC Electrical Characteristics

VDDA - VGNDA = 3.0V to 5.5V, VDDB - VGNDB = 3.0V to 5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDDA - VGNDA = 3.3V, VDDB - VGNDB = 3.3V, VGNDA = VGNDB, and TA = +25°C. Notes 2, 3

PARAMETER POWER

CONDITIONS

TYP MAX

UNITS

Supply Voltage Supply Current

VDDA VDDB

IDDA

VDDA = 5V, DE = high, RE = TXD = low, RXD unconnected, no load,

TD1/TD2 unconnected

IDDB

DE = high, RE = TXD = low, RXD unconnected, no load, VDDB = 3.3V

Undervoltage Lockout Threshold

Undervoltage Lockout Threshold Hysteresis

TRANSFORMER DRIVER

VUVLOA VUVLOB VUVHYSTA VUVHYSTB

RE, RXD, DE, TXD TD1/TD2 driver

RE, RXD, DE, TXD TD1/TD2 driver

Output Resistance

TD1/TD2 = low, IOUT = 300mA

TD1, TD2 Current Limit

Switching Frequency Duty Cycle

ILIM
4.5V VDDA 5.5V 3.0V VDDA 3.6V
785 1300
Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX14853GWE+ -40°C to +105°C
16 SOIC W

MAX14855GWE+ -40°C to +105°C
16 SOIC W

MAX14853GWE+T -40°C to +105°C
16 SOIC W

MAX14855GWE+T -40°C to +105°C
16 SOIC W
+Denotes a lead Pb -free/RoHS-compliant package. T = Tape and Reel

Chip Information

PROCESS BiCMOS

Package Information

For the latest package outline information and land patterns footprints , go to 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
16 SOIC

PACKAGE CODE

W16M+10

OUTLINE NO.
21-0042

LAND PATTERN NO.
90-0107

Maxim Integrated 22

MAX14853/MAX14855
3/15 Initial release
2.75kVRMS Isolated 500kbps/25Mbps Full-Duplex RS-485/RS-422 Transceivers with ±35kV ESD Protection and Integrated Transformer Driver

PAGES CHANGED
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at

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 and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 2015 Maxim Integrated Products, Inc. 23

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MAX14855GWE+ Datasheet file may be downloaded here without warranties.

Datasheet ID: MAX14855GWE+ 647232