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MAS3549F Datasheet(PDF) 68 Page - Micronas |
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MAS3549F Datasheet(HTML) 68 Page - Micronas |
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68 / 92 page  MAS 35x9F DATA SHEET 68 June 30, 2004; 6251-505-1DS Micronas Table 4–2: Reference Frequency Generation and Crystal Recommendation Symbol Parameter Pin Name Min. Typ. Max. Unit External Clock Input Recommendations fCLK Clock frequency XTI, XTO 13.00 18.432 20.00 MHz VCLKI Clockamplitude of external clock fed into XTI at VAVDD =2.2 V XTI 0.7 1.05 VPP Clockamplitude of external clock fed into XTI at VAVDD =2.7 V 0.55 1.5 Clockamplitude of external clock fed into XTI at VAVDD =3.3 V 0.45 1.75 Clockamplitude of external clock fed into XTO at VAVDD =2.2 V XTO 1.25 2.2 Clockamplitude of external clock fed into XTO at VAVDD =2.7 V 0.75 2.7 Clockamplitude of external clock fed into XTO at VAVDD =3.3 V 0.55 3.3 Duty cycle XTI, XTO 45 50 55 % Crystal Recommendations fP Load resonance frequency at CI =20pF XTI, XTO 18.432 MHz ∆f/f S Accuracy of frequency adjust- ment −50 50 ppm ∆f/f S Frequency variation vs. temper- ature −50 50 ppm REQ Equivalent series resistance 12 30 Ω C0 Shunt (parallel) capacitance 3 5 pF |
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