±15kV ESD-Protected, 3.3V Quad RS-422 Transmitters

±15kV ESD-Protected Quad Transmitters Enable Data Rates Up to 20Mbps

Please check latest availability status for a specific part variant.


The MAX3030E-MAX3033E family of quad RS-422 transmitters send digital data transmission signals over twisted-pair balanced lines in accordance with TIA/EIA-422-B and ITU-T V.11 standards. All transmitter outputs are protected to ±15kV using the Human Body Model. The MAX3030E-MAX3033E are available with either a 2Mbps or 20Mbps guaranteed baud rate. The 2Mbps baud rate transmitters feature slew-rate-limiting to minimize EMI and reduce reflections caused by improperly terminated cables.

The 20Mbps baud rate transmitters feature low-static current consumption (ICC < 100µA), making them ideal for battery-powered and power-conscious applications. They have a maximum propagation delay of 16ns and a part-to-part skew less than 5ns, making these devices ideal for driving parallel data. The MAX3030E-MAX3033E feature hot-swap capability that eliminates false transitions on the data cable during power-up or hot insertion.

The MAX3030E-MAX3033E are low-power, ESD-protected, pin-compatible upgrades to the industry-standard 26LS31 and SN75174. They are available in space-saving 16-pin TSSOP and SO packages.
MAX3030E, MAX3031E, MAX3032E, MAX3033E: Pin Configuration MAX3030E, MAX3031E, MAX3032E, MAX3033E: Pin Configuration Enlarge+

Key Features

  • Meet TIA/EIA-422-B (RS-422) and ITU-T V.11 Recommendation
  • ±15kV ESD Protection on Tx Outputs
  • Hot-Swap Functionality
  • Guaranteed 20Mbps Data Rate (MAX3030E, MAX3032E)
  • Slew-Rate-Controlled 2Mbps Data Rate (MAX3031E, MAX3033E)
  • Available in 16-Pin TSSOP and Narrow SO Packages
  • Low-Power Design (<330µW, VCC = 3.3V Static)
  • +3.3V Operation
  • Industry-Standard Pinout
  • Thermal Shutdown


  • Industrial PLCs
  • Motor Control
  • Telecom Backplanes
  • V.11/X.21 Interface
Part NumberTx/RxVSUPPLY
Data Rate
ESD Protect.
Tx ENSlew Rate LimitingOper. Temp.
typminSee Notes
MAX3030E 4Tx3.30.12000015YesNo
-40 to +85
0 to +70
SOIC (N)/16
$1.55 @1k
MAX3031E 2000
SOIC (N)/16
MAX3032E 20000
SOIC (N)/16
MAX3033E 2000
SOIC (N)/16
See All RS-485/RS-422 Line Driver/Receivers (205)
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.

Quality and Environmental Data

Product Reliability Reports: MAX3033E.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX3033ECSE+
  • MAX3033ECSE+T
  • MAX3033ECUE+
  • MAX3033ECUE+T
  • MAX3033EESE+
  • MAX3033EESE+T
  • MAX3033EEUE+
  • MAX3033EEUE+T
  • MAX3033EEUE/GG8
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    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.

    Quality Management System >
    Environmental Management System >


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