FS26 datasheet(115/156 Pages) NXP

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NXP Semiconductors

FS26

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

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

VAMUX_OFF

Offset voltage (IAMUX = 1 mA)

-7

—

Ratio accuracy

VAMUX_RATIO

Ratio 1

Ratio 1.5

Ratio 2.5

Ratio 7.5

Ratio 14

-0.5

-1.5

—

0.5

1.5

RAMUX_DIV

Analog multiplexer total bridge resistance for BATSENSE, VSUP, VBST,

WAKE1, WAKE2, GPIO1, GPIO2

0.75

1.5

MΩ

RAMUX_PD

Analog multiplexer internal pull-down resistance

kΩ

VTEMP25

Temperature sensor voltage at 25 °C

2.01

2.055

2.1

VTEMP_COEFF

Temperature sensor coefficient

-6.25

-5.88

-5.5

mV/°C

TAMUX_SET

Settling time

(from 10 % to 90 % of VDDIO, RS = 220 Ω, COUT = 10 nF)

—

µs

External components

Nominal output resistor (±10 %)

—

220

—

Nominal[1] output capacitance

2.2

COUT

Effective[2] output capacitance

1.1

—

Table 115. AMUX Electrical characteristics...continued

[1]

For all regulators, the nominal value is the value normalized.

[2]

For all regulators, the effective capacitor value is the capacitor value after tolerance, DC bias and aging removal.

19.3 System I/O pins

19.3.1 WAKE1 and WAKE2: wake-up inputs

WAKE1 pin and WAKE2 pin are programmable inputs used to detect wake-up events on either high or low

levels. Both WAKEx pins are protected up to 40 V and are suitable to connect to a wake-up signal outside the

ECU.

For each pin, an internal pull-down can be enabled with WKxPD_OTP and its value chosen with

WKxPD_SEL_OTP.

Additionally, the VIL / VIH theresholds VIL_WAKEx / VIH_WAKEx can be chosen with WKxTH_OTP and status is

reported on WKx_S.

WAKEx block

WAKEx

to logic

Wake up comp

WKxPD_SEL0

200 k

VBOS

VDIG

aaa-045473

WKxPD_SEL1

10 k

Figure 37. WAKEx pin block diagram

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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