SLLA535 December   2022 TLIN1431-Q1


  1. 1Introduction
    1.     Trademarks
  2. 2TLIN1431x-Q1 Hardware Component Functional Safety Capability
  3. 3Development Process for Management of Systematic Faults
    1. 3.1 TI New-Product Development Process
    2. 3.2 TI Functional Safety Development Process
  4. 4TLIN1431x-Q1 Component Overview
    1. 4.1 Targeted Applications
    2. 4.2 Hardware Component Functional Safety Concept
    3. 4.3 Functional Safety Constraints and Assumptions
  5. 5Description of Hardware Component Parts
    1. 5.1 LIN Transceiver
    2. 5.2 Digital Core
    3. 5.3 Power Control IP
    4. 5.4 Digital Input/Output Pins and High-side Switch
  6. 6TLIN1431x-Q1 Management of Random Faults
    1. 6.1 Fault Reporting
    2. 6.2 Functional Safety Mechanism Categories
    3. 6.3 Description of Functional Safety Mechanisms
      1. 6.3.1 LIN Bus and Communication
        1. SM-1: LIN TXD Pin Dominant State Timeout
        2. SM-2: LIN Bus Stuck Dominant System Fault: False Wake Up Lockout
        3. SM-3: LIN Bus Short Circuit Limiter
        4. SM-20: LIN Internal pull-up to VSUP
        5. SM-22: LIN Protocol
      2. 6.3.2 Voltage Rail Monitoring
        1. SM-4: VCC and Transceiver Thermal Shutdown
        2. SM-5: VCC Under-voltage
        3. SM-6: VCC Over-voltage
        4. SM-7: VCC Short to Ground
        5. SM-8: VSUP Under-voltage
      3. 6.3.3 Processor Communication
        1. SM-9 and SM-10: Watchdog
          1. SM-9: Standby Mode Long Window Timeout Watchdog
          2. SM-10: Normal Mode Watchdog
        2. SM-11: SPI CRC
        3. SM-12: SPI Communication Error; SPIERR
        4. SM-13: Scratchpad Write/Read Register
        5. SM-14: Sleep Wake Error Timer; tINACT_FS
      4. 6.3.4 Digital Input/Output Pins and High-side Switch
        1. SM-15: CLK internal pull-up to VINT
        2. SM-16: SDI internal pull-up to VINT
        3. SM-17: nCS Internal pull-up to VINT
        4. SM-18: DIV_ON Internal pull-down to GND
        5. SM-19: TXD Internal pull-up to VINT
        6. SM-21: nRST Internal pull-up to VINT
        7. SM-23: HSS Over Current Detect
        8. SM-24: HSS Open Load Detect
          1.        A Summary of Recommended Functional Safety Mechanism Usage
            1.         B Distributed Developments
              1.          B.1 How the Functional Safety Lifecycle Applies to TI Functional Safety Products
              2.          B.2 Activities Performed by Texas Instruments
              3.          B.3 Information Provided
                1.           C Revision History


This document is a functional safety manual for the Texas Instruments TLIN1431-Q1 component. The specific orderable part numbers supported by this functional safety manual are as follows:

  • TLIN14313RGYQ1
  • TLIN14315RGYQ1

This functional safety manual provides information needed by system developers to help in the creation of a functional safety system using a TLIN1431x-Q1 component. This document includes:

  • An overview of the component architecture
  • An overview of the development process used to decrease the probability of systematic failures
  • An overview of the functional safety architecture for management of random failures
  • The details of architecture partitions and implemented functional safety mechanisms

The following information is documented in the TLIN1431-Q1 Functional Safety Analysis Report and is not repeated in this document:

  • Summary of failure rates (FIT) of the component
  • Summary of functional safety metrics of the hardware component for targeted standards (for example IEC 61508, ISO 26262, and so forth)
  • Quantitative functional safety analysis (also known as FMEDA, Failure Modes, Effects, and Diagnostics Analysis) with detail of the different parts of the component, allowing for customized application of functional safety mechanisms
  • Assumptions used in the calculation of functional safety metrics

The following information is documented in the TLIN1431-Q1 Functional Safety Report, and is not repeated in this document:

  • Results of assessments of compliance to targeted standards

The user of this document should have a general familiarity with the TLIN1431x-Q1 component. For more information, refer to the TLIN1431-Q1 data sheet. This document is intended to be used in conjunction with the pertinent data sheets, technical reference manuals, and other component documentation.

For information that is beyond the scope of the listed deliverables, contact your TI sales representative or go to