This document is a functional safety manual for the Texas Instruments TPS3704x-Q1 component. The specific orderable part numbers supported by this functional safety manual are as shown in the device naming convention. For non automotive grade parts remove the -Q1 from the device name.

This functional safety manual provides information needed by system developers to help in the creation of a functional safety system using a TPS3704x-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 TPS3704x-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 TPS3704x-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 TPS3704x-Q1 component. For more information, refer to the TPS3704x-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 https://www.ti.com/technologies/functional-safety/overview.html.

This section summarizes the component functional safety capability.

This hardware component:

• Was developed as a functional Safety Element out of Context (SEooC)
• Was developed according to the relevant requirements of IEC 61508:2010
• Was developed according to the relevant requirements of ISO 26262:2018
• Includes sufficient functional safety mechanisms for random fault integrity requirements of SIL-1
• Includes sufficient functional safety mechanisms for random fault integrity requirements of ASIL-A
• Achieves systematic integrity of SIL-3
• Achieves systematic integrity of ASIL-D
• Has passed a functional safety assessment by Texas Instruments

For functional safety development, it is necessary to manage both systematic and random faults. Texas Instruments follows a new-product development process for all of its components which helps to decrease the probability of systematic failures. This new-product development process is described in Section 3.1. Components being designed for functional safety applications will additionally follow the requirements of TI's functional safety development process, which is described in Section 3.2.