SFFSB40A February   2026  – May 2026 ISO6421 , ISO6421-Q1

 

  1.   1
  2.   2
  3.   Trademarks
  4. 1Overview
  5. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 D-8 SOIC Package
    2. 2.2 DWV-8 Wide-SOIC Package
  6. 3Failure Mode Distribution (FMD)
  7. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 D-8 SOIC and DWV-8 Wide-SOIC Packages
  8. 5Revision History

1 Overview

This document contains information for the ISO6421 and ISO6421-Q1 (D-8 SOIC and DWV-8 Wide-SOIC packages) to aid in a functional safety system design. Information provided are:

  • Functional safety failure in time (FIT) rates of the semiconductor component estimated by the application of industry reliability standards
  • Component failure modes and distribution (FMD) based on the primary function of the device
  • Pin failure mode analysis (pin FMA)

Figure 1-1 shows the device functional block diagram for reference.

ISO6421 ISO6421-Q1 Functional Block Diagram Figure 1-1 Functional Block Diagram

The ISO6421 and ISO6421-Q1 were developed using a quality-managed development process, but were not developed in accordance with the IEC 61508 or ISO 26262 standards.