FS26 datasheet(114/156 Pages) NXP

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NXP Semiconductors

FS26

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

AMUX_EN

AMUX[4:0]

Signal selection for AMUX output

AMUX_DIV = 0 AMUX_DIV = 1

00101

Digital voltage supply for main domain (1.6 V ± 50 mV)

00110

Digital voltage supply for fail-safe domain (1.6 V ± 50 mV)

00111

VCORE voltage

1.5

01000

VPRE voltage

2.5

01001

LDO1 voltage

2.5

01010

LDO2 voltage

2.5

01011

VREF voltage

2.5

01100

TRK1 voltage

2.5

01101

TRK2 voltage

2.5

01110

VDDIO voltage

2.5

01111

VBOS internal voltage

2.5

10000

VBST voltage (divider ratio configurable by SPI)

7.5

10001

VSUP voltage (divider ratio configurable by SPI)

7.5

10010

WAKE1 voltage (divider ratio configurable by SPI)

7.5

10011

WAKE2 voltage (divider ratio configurable by SPI)

7.5

10100

GPIO1 voltage (divider ratio configurable by SPI)

7.5

10101

GPIO2 voltage (divider ratio configurable by SPI)

7.5

10110

BATSENSE pin voltage (divider ratio configurable by SPI)

7.5

10111

Central die temperature sensor.[1]

11000

VCORE temperature sensor.[1]

11001

VPRE temperature sensor.[1]

11010

LDO1 temperature sensor.[1]

11011

LDO2 temperature sensor.[1]

11100

TRK1 temperature sensor.[1]

11101

TRK2 temperature sensor.[1]

11110

GPIO1 temperature sensor.[1]

11111

Reserved

N/A

Table 114. AMUX output selection...continued

[1]

Temp (°C) = (VAMUX_OUT – VTEMP25) / VTEMP_COEFF + 25

TA = –40 °C to 125 °C, unless otherwise specified. VSUP_UVH < VSUP < 36 V, VPRE_PWM + VPRE_HDR < VSUP_PWR < 36 V, unless otherwise specified. All voltages

are referenced to ground.

Symbol

Description

Min

Typ

Max

Unit

Electrical characteristics

VAMUX_VDDIO

VDDIO operating voltage range

3.0

—

5.5

VAMUX_OUT

Output voltage range

0.3

—

3.0

Input voltage range for VSUP, BATSENSE, VBST,

WAKE1, WAKE2, GPIO1, GPIO2

VAMUX_IN

Ratio 7.5

Ratio 14

2.5

4.2

—

IAMUX

Output buffer current capability

—

Table 115. AMUX Electrical characteristics

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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