MAX3430

±80V Fault-Protected, Fail-Safe, 1/4-Unit Load, +3.3V RS-485 Transceiver

±80V Fault-Protected, Fail-Safe, 1/4-Unit Load, +3.3V RS-485 Transceiver


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Description

The MAX3430 fault-protected RS-485 transceiver features ±80V protection from overvoltage signal faults on communication bus lines. Each device contains one driver and one receiver, and the output pins can withstand faults, with respect to ground, of up to ±80V. Even if the faults occur when the transceiver is active, shut down, or powered off, the device will not be damaged. The MAX3430 operates from a 3.3V supply and features a slew-rate-limited driver that minimizes EMI and reduces reflections caused by improperly terminated cables, allowing error-free data transmission at data rates up to 250kbps. The MAX3430 has a 1/4-unit-load receiver input impedance allowing up to 128 transceivers on a single bus and features fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open.

Hot-swap circuitry eliminates false transitions on the data cable during circuit initialization or connection to a live backplane. Short-circuit current limiting and thermal- shutdown circuitry protect the driver against excessive power dissipation.

The MAX3430 is available in 8-pin SO and 8-pin PDIP packages, and is specified over commercial and industrial temperature ranges.
MAX3430: Typical Operating Circuit MAX3430: Typical Operating Circuit Enlarge+

Key Features

  • ±80V Fault Protection
  • ±12kV ESD Protection
  • +3.3V Operation
  • Internal Slew-Rate Limiting
  • 250kbps Data Rate
  • Allows Up to 128 Transceivers on the Bus
  • -7V to +12V Common-Mode Input Voltage Range
  • True Fail-Safe Inputs
  • Hot-Swap Input Structure on DE
  • Available in 8-Pin SO and PDIP Packages

Applications/Uses

  • Industrial Control Local Area Networks
  • Lighting Systems
  • Multimaster RS-485 Networks
  • PROFIBUS Applications
  • RS-422/RS-485 Communications
Part NumberTx/RxDuplexVSUPPLY
(V)
Fault Protect.
(±V)
ICC
(mA)
Data Rate
(kbps)
ESD Protect.
(±kV)
Tx ENRx ENICC (Shutdn.)
(µA)
Rx/Tx on BusRx Failsafe w/ InputsSlew Rate LimitingOper. Temp.
(°C)
Package/PinsBudgetary
Price
typmintypSee Notes
MAX3430 1Tx + 1RxHalf3.3803.525012YesYes100128Open or ShortedNo
-40 to +85
0 to +70
PDIP/8
SOIC (N)/8
$2.67 @1k
See All RS-485/RS-422 Line Driver/Receivers (204)
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.

Technical Documents

Tutorial 4697 Overview of Industrial Motor Control Systems

Quality and Environmental Data

Product Reliability Reports: MAX3430.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX3430CPA
  • MAX3430CPA+
  • MAX3430CSA+
  • MAX3430CSA+T
  • MAX3430EPA
  • MAX3430EPA+
  • MAX3430ESA+
  • MAX3430ESA+T
  • MAX3430ESA/GG8-T
  • MAX3430MSA/PR2-TW
  • MAX3430MSA/PR2-W
  • MAX3430MSA/PR3+
  • 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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