The Stn1110 Obd2 Interpreter IC stands as a highly efficient and cost-effective solution for accessing vehicle data. This compact integrated circuit is engineered to bridge the gap between complex On-Board Diagnostics II (OBD-II) protocols and simple UART interfaces, making vehicle diagnostics and data acquisition more accessible than ever. Fully compatible with the popular ELM327 command set, the STN1110 not only matches but surpasses the original ELM327 in terms of performance, stability, and feature richness. It’s an ideal component for developers and enthusiasts looking to tap into the wealth of information available from modern vehicles.
Please Note: While the STN1110 remains a robust and reliable choice, OBD Solutions recommends considering the STN2100 for all new hardware designs. The STN2100 encompasses all the functionalities of the STN1110, often at a comparable cost, and represents the cutting edge in OBD interpreter IC technology. OBD Solutions will continue to support the STN1110, but future feature enhancements will be focused on the STN21xx series.
STN1110 Interpreter IC
Key Features and Benefits of the STN1110 OBD2 IC
The STN1110 OBD2 Interpreter IC is packed with features designed to provide superior performance and flexibility in vehicle diagnostics and data communication:
- Enhanced Performance: Built around a modern 16-bit processor, the STN1110 operates significantly faster than comparable ICs, offering quicker data processing and response times.
- Unmatched Data Throughput: Experience data acquisition at its finest. The STN1110 delivers up to twice the data throughput of competitors, ensuring you get more vehicle parameters in less time.
- High-Speed UART Communication: Supporting UART baud rates up to 10 Mbps, the STN1110 is 20 times faster than the quickest OBD protocol, facilitating rapid data transfer for demanding applications.
- Secure Firmware Updates: The integrated safe and secure bootloader allows for easy firmware reflashing in the field. This crucial feature helps prevent costly product recalls by enabling updates even over unreliable connections.
- ELM327 Command Set Compatibility: Enjoy seamless integration with existing software applications. The STN1110 is fully compatible with the widely adopted ELM327 command set, ensuring out-of-the-box functionality with numerous OBD-II software platforms.
- Extended “ST” Command Set: Unlock advanced capabilities without sacrificing compatibility. The extended “ST” command set provides access to enhanced features, allowing for deeper diagnostics and control.
- PowerSave Mode: Ideal for permanent vehicle installations, the PowerSave mode with multiple sleep and wakeup triggers minimizes battery drain when the device is not actively in use. This feature is essential for devices intended to be left connected for extended periods.
- Versatile Form Factors: The STN1110 is available in SPDIP, SOIC, and QFN packages, providing flexible integration options to suit a wide range of application sizes and requirements.
- Broad OBD Protocol Support: The STN1110 supports all legislated OBD-II protocols as well as non-legislated and heavy-duty protocols, ensuring compatibility with a vast majority of vehicles worldwide.
- Proven Stability: Leveraging the same robust software that powers the OBDLink family of OBD interfaces, the STN1110 benefits from field-tested code known for its reliability and accuracy.
- Large Message Buffer: With significantly more RAM than competing chips, the STN1110 virtually eliminates buffer overflow errors, ensuring data integrity and reliable communication.
- Intelligent Protocol Detection: The automatic protocol detection algorithm is constantly refined to guarantee connection to the broadest range of vehicles, even those with slight deviations from the OBD-II standard.
Comprehensive Protocol Support
The STN1110 OBD2 Interpreter IC is engineered to communicate across a wide spectrum of OBD protocols, ensuring compatibility with virtually any OBD-II compliant vehicle. This includes:
- Legislated OBD-II Protocols:
- ISO 15765-4 (CAN) – Controller Area Network, the modern standard for vehicle communication.
- ISO 14230-4 (Keyword Protocol 2000) – KWP2000, commonly found in many vehicles.
- ISO 9141-2 – Used in Asian, European, and Chrysler vehicles.
- SAE J1850 VPW (Variable Pulse Width Modulation) – Primarily used in GM vehicles.
- SAE J1850 PWM (Pulse Width Modulation) – Predominantly used in Ford vehicles.
- Non-Legislated OBD Protocols:
- ISO 15765
- ISO 11898 (raw CAN) – For advanced applications requiring direct CAN bus access.
- Heavy-Duty Vehicle Protocol:
- SAE J1939 OBD protocol – The standard for heavy-duty vehicles, trucks, and buses.
Enhanced Stability and Reliability
Stability is paramount in automotive diagnostics, and the STN1110 is built to deliver unwavering performance. Its firmware is based on the proven codebase of OBD Solutions’ renowned OBDLink interfaces, known for their robustness in real-world applications. The extensive user base of OBDLink products ensures that any potential issues are quickly identified and resolved, leading to a highly refined and dependable IC. Furthermore, the generous OBD message buffer capacity minimizes the risk of data loss due to buffer overruns, a common issue in less capable interpreter chips. The intelligent automatic protocol detection further enhances reliability by ensuring a stable connection across a diverse range of vehicles, even those that may not strictly adhere to all OBD-II specifications.
PowerSave Sleep/Wakeup Functionality
For applications requiring continuous in-vehicle presence, power efficiency is critical. The STN1110 incorporates an advanced PowerSave mode designed to minimize battery drain. It features multiple sleep and wakeup triggers, allowing developers to customize power management strategies based on specific application needs. Detailed information on these triggers can be found in the STN11xx PowerSave Functionality documentation.
Diagram illustrating the various sleep and wakeup triggers available in the STN11xx family of ICs for power saving.
Cost-Effective Solution
The STN1110 OBD2 Interpreter IC offers significant cost savings, often up to 200% compared to competing solutions. Generous volume discounts are available, making it an economically attractive option for both small and large-scale projects. For detailed pricing information and volume tiers, please see current pricing tiers. Interested parties can also request free samples to evaluate the STN1110 in their specific applications.
Downloads and Resources
Explore these resources for in-depth information and support for the STN1110 OBD2 Interpreter IC:
- STN1110 Datasheet
- STN1100 Family Reference and Programming Manual
- STN11xx PowerSave Functionality
- STN1110 Press Release
- Firmware Update Specification for Devices with STN Bootloader
- STN1110 vs. ELM327 Comparison
Open Hardware Projects Utilizing STN1110
Get inspired by these open hardware projects showcasing the versatility of the STN1110:
- Arduino Vehicle OBD2 Shield (Kostas Sigalas/Sigalabs)
- Sparkfun OBD-II UART board — PCB files in Cadsoft Eagle format
- STN1110 Bluetooth OBD-II Adapter (Andy Honecker) — PCB files in Altium format
- STN1110 Bluetooth OBD-II Adapter (Nabil Tewolde) — PCB files in Cadsoft Eagle format
Tutorials and Guides
While the STN1110 remains a powerful and cost-effective OBD2 interpreter IC, for new projects, consider exploring the advanced capabilities of the STN2100. Both ICs provide exceptional access to vehicle data, but the STN2100 represents the latest advancements in OBD Solutions’ interpreter IC technology.
