+3.3V, Multiprotocol, 3 Tx/3 Rx, Software-Selectable Clock/Data Transceiver

Industry's First +3.3V Multiprotocol Transceiver Intended for Use with Control Signals

Please check latest availability status for a specific part variant.


The MAX3170 is a three-driver/three-receiver multiprotocol transceiver that operates from a +3.3V single supply. The MAX3170, along with the MAX3171/MAX3173 and MAX3172/MAX3174, form a complete software-selectable data terminal equipment (DTE) or data communications equipment (DCE) interface port that supports the V.28 (RS-232), V.11 (RS-449/V.36, EIA530, EIA530-A, X.21), and V.35 protocols. The MAX3170 transceiver carries the high-speed clock and data signals, while the MAX3171 or MAX3173 carries the control signals. The MAX3170 can be terminated by the MAX3172 or MAX3174 software-selectable resistor termination network or by a discrete termination network.

An internal charge pump and proprietary low-dropout transmitter output stage allow V.11-, V.28-, and V.35-compliant operation from a +3.3V single supply. A no-cable mode is entered when all mode pins (M0, M1, and M2) are pulled high or left unconnected. In no-cable mode, supply current decreases to 1mA and all transmitter and receiver outputs are disabled (high impedance). Short-circuit limiting and thermal shutdown circuitry protect the drivers against excessive power dissipation.
MAX3170: Typical Operating Circuit MAX3170: Typical Operating Circuit Enlarge+

Key Features

  • Industry's First +3.3V Single-Supply Transceiver
  • 3V/5V Logic-Compatible I/O
  • Certified TBR-1 and TBR-2 Compliant (NET1 and NET2)—Pending Completion
  • Supports V.28 (RS-232), V.11 (RS-449/V.36, EIA530, EIA530-A, X.21), and V.35 Protocols
  • Software-Selectable DTE/DCE
  • Complete DTE/DCE Port with MAX3171/MAX3173 and MAX3172/MAX3174
  • True Fail-Safe Receiver Operation
  • Available in Small 28-Pin SSOP Package
  • 10Mbps Operation (V.11/V.35)
  • Requires Only Four Tiny Surface-Mount Capacitors
  • All Transmitter Outputs Are Fault Protected to ±15V to Survive Cable Miswiring


  • CSUs/DSUs
  • Data Networking PCI Cards
  • Data Routers
Part NumberFunctionsRS-232 Data Rate
RS-485 Data Rate
Single Ended Tx/RxDiff. Tx/RxShutdnSupported ProtocolsDCE/ DTE Interchg.Rx Glitch RejectionTx Fault Protect.On Chip Charge PumpICC
ICC (Shutdown)
maxmaxmaxSee Notes
MAX3170 Multiprotocol Clock and Data Transceiver0.24103/33/3Yes
$6.96 @1k
See All Multiprotocol Transceivers (18)
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.

MAX3170EVKIT: Evaluation Kit for the MAX3170, MAX3171, MAX3172

Quality and Environmental Data

Product Reliability Reports: MAX3170.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • MAX3170CAI
  • MAX3170CAI+
  • MAX3170CAI+T
  • MAX3170CAI-T
  • 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.

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