S32K310 datasheet(93/164 Pages) NXP

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Table 45. FXOSC...continued

Symbol

Description

Min

Typ

Max

Unit

Condition

Spec

Number

TFXOSC

Fxosc start

up time (ALC

enabled) [2]

—

IFXOSC

Oscillator Analog

circuit supply

current, V25 supply

(ALC enable)

—

using 8, 16 or 40 MHz

crystal

—

IFXOSC

Oscillator Analog

circuit supply

current, V25 supply

(ALC disabled)

—

2.7

using 8, 16 or 40 MHz

crystal

—

EXTAL_SWING_

Peak-to-peak

voltage swing on

EXTAL pin in crystal

oscillator mode (ALC

enabled)

0.3

—

1.4

—

EXTAL_SWING_

Peak-to-peak

voltage swing on

EXTAL pin in crystal

oscillator mode (ALC

disabled) [3]

1.2

—

2.75

—

CLKIN_VIL_

EXTAL_BYPASS

Input clock low level

in bypass mode [4]

—

vref-1

vref=0.5*VDD_HV_A

—

CLKIN_VIH_

EXTAL_BYPASS

Input clock high level

in bypass mode [4]

vref+1

—

VDD_HV

vref=0.5*VDD_HV_A

—

VSB

Self Bias Voltage

350

—

850

—

Amplifier

Transconductance

9.7

14.04

18.5

mA/V

GM_SEL[3:0] =

4`b1111

—

[1] For bypass mode applications, the EXTAL pin should be driven low when FXOSC is in off/disabled state.

[2] The startup time specification is valid only when the recommended crystal and load capacitors are used. For higher load capacitances, the actual startup time

might be higher.

[3] The recommended gm setting to ensure extal swing < 2.75V at 8MHz in ALC-disabled mode is gm=4'b0010. Recommended gm settings in ALC-disabled

mode for all other supported frequencies and crystals remain the same.

[4] For bypass mode applications, the EXTAL pin should be driven symmetrical around Vref =0.5* VDD_HV_A

To ensure stable oscillations, FXOSC incorporates the feedback resistance internally.

In single ended bypass mode, the XTAL pin can be left unconnected.

Drive level is a crystal specification and if crystal load capacitance is increased beyond the recommended value, it may violate

the crystal drive level rating. In such cases, contact NXP sales representative for selecting the correct crystal.

NXP Semiconductors

S32K3XX

S32K3xx Data Sheet

S32K3XX

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

Product data sheet

Rev. 13 — 12 November 2025

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