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NXP Semiconductors

FS26

Safety system basis chip with low power for ASIL D/ASIL B

2 General description

Devices in the FS26 automotive safety system basis chip (SBC) family are designed to support entry and mid-

range safety microcontrollers, like those in the S32K3 series. FS26 devices have multiple power supplies and

the flexibility to work with other microcontrollers targeting automotive electrification. Possible FS26 applications

include power train, chassis, safety, and low-end gateway technology.

This family of devices consists of several versions that are pin-to-pin and software compatible. These versions

support a wide range of applications with Automotive Safety Integrity Levels (ASIL) B or D, offering choices in

number of output rails, output voltage settings, operating frequencies, power-up sequencing, and integrated

system-level features.

The FS26 features multiple switch mode regulators and low dropout (LDO) voltage regulators to supply the

microcontroller, sensors, peripheral ICs, and communication interfaces. It offers a high-precision reference

voltage supply for the system, and for two independent tracking regulators. The FS26 also offers various

functionalities for system control and diagnostics, including an analog multiplexer, general-purpose input/

outputs (GPIOs), and selectable wake-up events from I/O, long duration timer, or serial peripheral interface

(SPI) communication.

The FS26 is developed in compliance with the ISO 26262 standard, and includes enhanced safety features

with multiple fail-safe outputs. It uses the latest on demand latent fault monitoring, and can be part of a safety-

oriented system partitioning scheme covering both ASIL B and ASIL D safety integrity levels.

FS26_SDS

All information provided in this document is subject to legal disclaimers.

Product short data sheet

Rev. 6.0 — 12 December 2025

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