STN1170: OBD-II, SW-CAN, MS-CAN Interpreter IC

STN1170 combines the entire STN1110 (multiprotocol OBD-II) feature set with Single Wire CAN (SW-CAN) and Medium Speed CAN (MS-CAN) protocols in a single 44-pin IC. SW-CAN protocol support allows your device to access, monitor and issue commands on vehicles utilizing GM’s proprietary CAN network. Similarly, MS-CAN provides access to Ford’s proprietary CAN network on supporting models.

On vehicles hosting SW-CAN or MS-CAN networks, our enhanced ST command set allows your device to interpret data not available on the vehicle’s OBD-II bus. Using the GM & Ford proprietary codes, you can commonly interpret current status of systems such as:
STN1170 Interpreter Chips

  • Seat belt
  • Airbag
  • Headlight
  • Anti-Lock Brake (ABS)
  • Traction Control

Control commands commonly found on supported vehicles include:

  • Door lock/unlock
  • Window up/down
  • Radio volume up/down
  • Turn signals & Hazard on/off
  • Engine start/kill

Order NowWhile STN1170 ST commands will provide access to SW-CAN and MS-CAN networks, the proprietary GM & Ford codes must be obtained independently. A popular method is to join the Equipment and Tool Institute where the codes can be accessed/purchased. Alternately, the traffic can be analyzed and reverse engineered.


  • Safe, secure bootloader. Reflash the firmware in the field, even over a poor quality link and avoid expensive product recalls.
  • Fully compatible with ELM327 command set, ensuring out-of-the-box compatibility with the dozens of existing software applications.
  • Extended “ST” command set provides access to enhanced functionality, without compromising compatibility.
  • PowerSave mode with multiple sleep and wakeup triggers. Ideal for permanent in-vehicle setups, device can be left connected for extended periods of time without draining the battery.
  • Perfect form factor for any application. STN1170 is available in TQFP and QFN packages.
  • RoHS compliant


STN1170 supports the following protocols:

  • all legislated OBD II protocols:
    • ISO 15765-4 (CAN)
    • ISO 14230-4 (Keyword Protocol 2000)
    • ISO 9141-2 (Asian, European, Chrysler vehicles)
    • SAE J1850 VPW (GM vehicles)
    • SAE J1850 PWM (Ford vehicles)
  • non-legislated OBD protocols:
    • Single Wire CAN (SW-CAN) – GM proprietary network
    • Medium Speed CAN (MS-CAN) – Ford proprietary network
    • ISO 15765
    • ISO 11898 (raw CAN)
  • SAE J1939 OBD protocol used in heavy-duty vehicles


  • Solid, field-tested software. STN1170 runs the same proven code that powers the popular STN1110 and OBDLink family of PC-based OBD interfaces. Thanks to its large user base, any problems are discovered and corrected quickly.
  • Large OBD message buffer. STN1170 has over five times as much RAM as its nearest competitor, virtually eliminating BUFFER OVERFLOW errors.
  • Automatic protocol detection algorithm is continuously fine-tuned to insure that STN1170 will connect to the widest array of vehicles, even those that do not fully conform to the OBD-II standard.

PowerSave Sleep/Wakeup Triggers

The diagram shows the various triggers available in the STN11xx family of ICs. Please refer to the STN11xx PowerSave Functionality documentation for more details.

STN11xx Sleep/Wakeup Triggers Diagram


  • units 1-9: $10.99 each
  • units 10-99: $10.49
  • units 100-999: $9.49
  • units 1,000-9,999: $8.68
  • units 10,000 – 24,999: $7.95

Please contact us for additional inquires.

For small quantities, lead time is only a few days. For production level quantities, please allow 6-8 weeks lead time.


STN1170 Datasheet
STN11xx Family Reference and Programming Manual
ST Commands for Single-Wire CAN & Medium-Speed CAN development
STN11xx PowerSave Functionality
Firmware Update Specification for Devices with STN Bootloader

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