MAX33072E

+3V to +5.5V, Polarity Invert RS-485 Half-Duplex Transceiver with ±65V Fault Protection, ±40V CMR, and ±40kV ESD

Industry's Highest Common-Mode Range RS-485 at ±40V, with Highest ESD at ±40kV and ±65V of Fault Protection


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Description

The MAX33072E/MAX33073E are a family of fault-protected RS-485/RS-422 transceivers with high ±65V protection for overvoltage conditions on the communication bus lines, ensuring robust protection in harsh industrial environments. Both devices have ±40V of common-mode range (CMR) within VCCH (+4.5V to +5.5V), exceeding the RS-485 standard of -7V to +12V, suitable for electrically noisy environments where different systems have shifting ground levels relative to each other. They also incorporate a high ESD protection circuit capable of protecting against ±40kV of ESD HBM (human body model) for driver outputs and receiver inputs (A and B data lines). Each device contains one driver and one receiver and operates over the +3V to +5.5V supply range, making it convenient for designers to use one part with either +3.3V or +5V supply voltages across multiple end equipment.

These devices feature a polarity selection input (POL) that swaps the A and B data lines, allowing for software correction of cross-wired field cables.

The MAX33072E features slew-rate-limited outputs for data rates up to 500kbps, while the MAX33073E is rated up to 2Mbps for applications requiring higher bandwidth. These transceivers are optimized for robust communication in noisy environments. A true failsafe feature guarantees a logic-high on the receiver output when the inputs are open or shorted. Driver outputs are protected against short-circuit conditions. The receivers feature a 1/8 unit load input impedance, allowing up to 256 transceivers on a bus. The MAX33072E/MAX33073E are available in 8-pin SOIC and operate over the -40°C to +125°C temperature range.

MAX33072E, MAX33073E: Simplified Block Diagram MAX33072E, MAX33073E: Simplified Block Diagram Enlarge+

Key Features

  • Integrated Protection for Robust Communication
    • Protection on Driver Outputs/Receiver Inputs (A, B Data Lines)
      • ±65V Fault Protection Range on Driver Outputs/Receiver Inputs
      • ±40V Common-Mode Range on Driver Outputs/Receiver Inputs
      • ±40kV Human Body Model (JEDEC JS-001-2017) ESD Protection
      • ±15kV Air Gap Discharge (IEC 61000-4-2) ESD Protection
      • ±10kV Contact Discharge (IEC 61000-4-2) ESD Protection
    • Hot-Swap Protection
    • Short Circuit Protection
    • Thermal Shutdown
    • True Fail-Safe Guarantees Known Receiver Output State
    • Wide Operating Temperature Range from -40°C to +125°C
  • High-Performance Transceiver Enables Flexible Designs
    • Compliant with RS-485 EIA/TIA-485 Standard
    • 500kbps (MAX33072E), 2Mbps (MAX33073E) Maximum Data Rate
    • 3V to 5.5V Supply Range
    • 1/8 Unit Load for up to 256 Devices on the Bus

Applications/Uses

  • Agriculture and Heavy Machinery
  • Elevator Control
  • Home and Building Automation
  • HVAC
  • Industrial Automation Equipment
  • Motion Controllers
  • Power Supply and UPS

See parametric specs for RS-485/RS-422 Line Driver/Receivers (208)


Part NumberTx/RxDuplexVSUPPLY
(V)
Fault Protect.
(±V)
ICC
(mA)
Data Rate
(kbps)
ESD Protect.
(±kV)
Tx ENRx ENRx/Tx on BusRx Failsafe w/ InputsOper. Temp.
(°C)
Package/PinsBudgetary
Price
(typ)(min)(See Notes)
MAX33072E NEW!1Tx + 1RxHalf3.0 to 5.565350040YesYes256Open or Shorted-40 to +125
SOIC (N)/8
$2.04 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX33072ESHLD: Evaluation Kit for the MAX33072E
Request Reliability Report for: MAX33072E 
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

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Related Resources


MAX33072E
+3V to +5.5V, Polarity Invert RS-485 Half-Duplex Transceiver with ±65V Fault Protection, ±40V CMR, and ±40kV ESD

  • Integrated Protection for Robust Communication
  • High-Performance Transceiver Enables Flexible Designs

MAX33073E
+3V to +5.5V, Polarity Invert RS-485 Half-Duplex Transceiver with ±65V Fault Protection, ±40V CMR, and ±40kV ESD

  • Integrated Protection for Robust Communication
  • High-Performance Transceiver Enables Flexible Designs

MAX22088
Home Bus System (HBS) Compatible Transceiver

  • High Integration Reduces BOM and Footprint
  • Configurability Enables Flexible Design
  • Integrated Protection for Robust Communication

MAX14829
Low Power IO-Link Device Transceiver with Dual Drivers

  • Low Power Dissipation Reduces the Thermal Footprint for Small Sensors
  • Configurability and Integration Reduce SKUs
  • Selectable Driver Integrated Protection Enables Robust Communication