CIC61508 - signature watchdog

  • Products
  • Highlights
  • Documents
  • Boards
  • Simulation
  • Videos
  • Forums
  • Support
  • Software & Tools

CIC61508 - signature watchdog

Safety systems require an independent watchdog which implements a robust monitoring channel for main microcontroller supervision in ISO26262- and IEC61508-compliant safety applications. Thanks to its small footprint, the CIC61508 is a spacesaving and cost-effective option for supporting safety applications. The CIC61508 is a Safety Watchdog to build up functional safety applications. Examples of such applications include Airbag, Electrical Power Steering (EPS) and damping systems. The watchdog monitors the main microcontroller by providing features to detect common failure modes of clock, power supply and temperature related computational errors on the microcontroller. Therefore, it serves as an independent diagnostic monitoring device to allow the Safety Relevant Sytem to be ASIL-D approved. The CIC61508 provides the following functions in ROM.


CIC61508 - SIL-Supporting Key Features

  • Internal Test Scheduler / Sequencer
    • Generates a sequence of test requests with specific data and checks the response agains a static table


  • Supply Voltage Monitor
    • Capable of detecting under- and overvoltage in the supply to the monitored Microcontroller and trigger RESET if required


  • Data Verification Unit
    • Compares two data variables delivered within a determined time period to check for equality


  • Task Monitor
    • Monitor system using a defined schedule table to check the dispatch of critical tasks with predefined execution budgets


  • System Shutdown
    • Three levels of temporal system shutdown providing flexible sequences


Get your SafeTkit!

CIC61508 - signature watchdog

Product Brief

Title Size Date Version
413 KB 08 Sep 2011
953 KB 27 Jan 2011
1 MB 19 May 2011

User Manual

Title Size Date Version
1.7 MB 27 Jan 2011 02_02

Additional Technical Information

Title Size Date Version
1.5 MB 05 Jul 2011 01_02

Application Notes

Title Size Date Version
2.9 MB 15 Mar 2016 03_05

CIC61508 - signature watchdog

CIC61508 - signature watchdog

Self Service

Infineon welcomes your comments and questions.

If you have any questions concerning our products, please fill out the following form. Your inquiry will be sent to the appropriate specialist who will be in touch with you as soon as possible.

You will receive a confirmation E-mail to validate your address in our system. Any attached file to the reply which will help to support your inquiry is highly appreciated.

I agree that my personal data mentioned above (including my e-mail address and phone number) can be gathered, processed and used for sales promotion and market research by Infineon Technologies AG and its licensed distribution partners.

For more information about our privacy policy please click on Privacy Policy

Where to buy

Please use our location finder to get in contact with your nearest Infineon distributor or sales office

Find a location

Ask Infineon