ISO 26262-11:2018

Overview - ISO 26262-11:2018 (Semiconductors & Functional Safety)

ISO 26262-11:2018 is the informative guidance within the ISO 26262 series that explains how to apply automotive functional safety principles specifically to semiconductors (ASICs, SoCs, memories, PLDs, analogue/mixed-signal blocks, sensors and multi‑core devices). It helps integrate semiconductor‑focused safety activities into a company‑specific safety lifecycle for safety‑related electrical/electronic (E/E) systems in series‑production road vehicles (excluding mopeds and certain special/unique E/E systems). The document clarifies interpretations of other ISO 26262 parts and includes practical examples and annexes.

Key topics and technical focus

The standard addresses semiconductor‑specific aspects of functional safety and includes guidance on:

• Component partitioning and how to consider semiconductor parts within system architectures
• Fault models, failure modes and base failure rate estimation for semiconductor hardware
• Semiconductor‑dependent failure analysis (DFA) including dependent/cascading failures and mitigation measures
• Intellectual Property (IP) management: categories, safety requirements, lifecycle and black‑box integration
• Fault injection techniques for verification and validation of fault tolerance and diagnostics
• Diagnostics, confirmation measures and production/operation considerations for safety readiness
• Technology‑specific guidance for:
  • Digital components and memories (fault/failure modes, diagnostic coverage)
  • Analogue / mixed‑signal devices
  • Programmable Logic Devices (PLDs)
  • Multi‑core components, sensors and transducers
• Informative annexes with worked examples: quantitative analyses, DFA examples, diagnostic coverage calculations

Note: ISO 26262-11 is informative - it provides interpretations and examples to help satisfy requirements in other parts of ISO 26262 rather than specifying new normative requirements.

Practical applications

• Tailoring the ISO 26262 safety lifecycle to semiconductor development, verification and production
• Estimating hardware failure rates and determining diagnostic coverage needs for ASIL compliance
• Planning and validating fault‑injection campaigns and dependent failure mitigations
• Integrating third‑party IP or black‑box semiconductor blocks into safety‑relevant designs
• Producing safety documentation and work products required by OEMs and suppliers

Who should use this standard

• Automotive semiconductor designers (ASIC/SoC/IP teams)
• Functional safety engineers and system architects working on safety‑related E/E systems
• OEMs, Tier‑1 suppliers, verification and test teams involved in ASIL assessment and compliance
• Project managers and quality assurance personnel aligning semiconductor development with ISO 26262

Related standards

• ISO 26262 (other parts) - the broader automotive functional safety framework
• IEC 61508 - the generic functional safety standard from which ISO 26262 is adapted

Keywords: ISO 26262-11, functional safety, semiconductors, automotive safety, ASIL, fault injection, dependent failure analysis, semiconductor IP, digital components, analogue/mixed‑signal, PLD.