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STLUX285ATR Datasheet(PDF) 98 Page - STMicroelectronics

No. de pieza STLUX285ATR
Descripción Electrónicos  Digital controllers for lighting and power conversion applications with up to 6 programmable PWM generators, 96 MHz PLL, DALI
PDF  126 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STLUX285ATR Datasheet(HTML) 98 Page - STMicroelectronics

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Electrical characteristics
STLUX
98/126
DocID027870 Rev 1
Figure 21. HSE oscillator circuit diagram
The crystal characteristics have to be checked with Equation 3:
Equation 3
gm» gmCritic
where gmCritic is calculated with the crystal parameters as follows:
Equation 4
gmCritic = (2 * * fHSE)2 * Rm (2CO + C)2
and where:
Rm: motional resistance(d)
Lm: motional inductance(d)
Cm: motional capacitance(d)
CO: shunt capacitance(d)
CL1 = CL2 = C: grounded external capacitance
d. Refer to the application crystal specification.



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