STN1110 Multiprotocol OBD-II to UART Interpreter IC

STN1110 is a multiprotocol OBD to UART interpreter ("OBD chip") that supports all OBD-II protocols, and is fully compatible with the ELM327 command set, while outperforming the original ELM327 IC in every category: stability, performance, features, and price.


Lead Time Notice: Orders of 100+ may have a lead time of up to 12 weeks. Please contact us with any related questions before placing your order.

Availability: In Stock

$9.99
  • Buy 10 for $9.49 each and save 6%
  • Buy 100 for $8.49 each and save 16%
  • Buy 1000 for $7.65 each and save 24%
Item# 3651

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Details

Details

On-Board Diagnostics, Second Generation (OBD-II) is a set of standards for implementing a computer based system to control emissions from vehicles. It was first introduced in the United States in 1994, and became a requirement on all 1996 and newer US vehicles. Other countries, including Canada, parts of the European Union, Japan, Australia, and Brazil adopted similar legislation. A large portion of the modern vehicle fleet supports OBD-II or one of its regional flavors.

Among other things, OBD-II requires that each compliant vehicle be equipped with a standard diagnostic connector (DLC) and describes a standard way of communicating with the vehicle’s computer, also known as the ECU (Electronic Control Unit). A wealth of information can be obtained by tapping into the OBD bus, including the status of the malfunction indicator light (MIL), diagnostic trouble codes (DTCs), inspection and maintenance (I/M) information, freeze frames, VIN, hundreds of real-time parameters, and more.

STN1110 is an OBD to UART interpreter that can be used to convert messages between any of the OBD-II protocols currently in use, and UART. It is fully compatible with the de facto industry standard ELM327 command set. Based on a 16-bit processor core, the STN1110 offers more features and better performance than any other ELM327 compatible IC.

Feature Highlights

  • Fully compatible with the ELM327 AT command set
  • Extended ST command set
  • UART interface (baud rates from 38 bps to 10 Mbps)
  • Secure bootloader for easy firmware updates
  • Superior automatic protocol detection algorithm
  • Large memory buffer
  • Voltage input for battery monitoring
  • Available in SPDIP, SOIC and QFN-S packages
  • RoHS compliant

Stability

  • Solid, field-tested software. STN1110 runs the same proven code that powers the popular OBDLink family of PC-based OBD interfaces. Thanks to its large user base, any problems are discovered and corrected quickly.
  • Large OBD message buffer. STN1110 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 STN1110 will connect to the widest array of vehicles, even those that do not fully conform to the OBD 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.

PowerSave diagram

Specifications

Additional Info

DEVICE WEIGHT
  • SPDIP-28: 0.0758 oz (2.15 g)
  • SOIC-28 300mil: 0.028 oz (0.8 g)
  • QFN-28-S: 0.0033 oz (0.1 g)
DIMENSIONS
  • SPDIP-28: 34.91 x 8.31 x 7.07 mm
  • SOIC-28 300mil: 18.10 x 10.50 x 2.32 mm
  • QFN-28-S: 6.06 x 6.06 x 0.86 mm
OPERATING VOLTAGE 8-18V DC
OPERATING CURRENT 63 mA
BATTERYSAVER™ MODE < 2 mA
OPERATING TEMPERATURE -4º to 131º F (-20º to 55º C)

Protocols

  • All legislated OBD II protocols:
    • ISO 15765-4 (CAN 250/500 kbps, 11/29 bit)
    • ISO 14230-4 (Keyword Protocol 2000)
    • ISO 9141-2 (Asian, European, Chrysler)
    • SAE J1850 VPW (GM)
    • SAE J1850 PWM (Ford)
  • Non-legislated OBD protocols:
    • ISO 15765
    • ISO 11898 (raw CAN)
  • SAE J1939 OBD protocol used in heavy-duty vehicles

Compare

STN IC Comparison Chart

STN1110
STN1170
STN2120
UART interface
Compatible with ELM327 AT command set
Extended ST command set
PowerSave™ sleep/wake triggers
Secure bootloader
Automatic protocol detection algorithm
RAM
8k
8k
32k
ROM
128k
128k
256k
Performance (MIPS)
40
40
70
Support for all legislated OBD-II protocols
Support for Single-Wire CAN (SW-CAN)
Support for Medium-Speed CAN (MS-CAN)
Support for SAE J1939
Advanced security options
Recommended for new designs
Unit pricing (10k pieces; USD)
$6.80
$7.78
$7.78

Documentation

Apps & Firmware

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