Datenblatt-Suchmaschine für elektronische Bauteile |
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SM5847 Datenblatt(PDF) 7 Page - Nippon Precision Circuits Inc |
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SM5847 Datenblatt(HTML) 7 Page - Nippon Precision Circuits Inc |
7 / 30 page SM5847AF NIPPON PRECISION CIRCUITS—7 AC Electrical Characteristics Crystal oscillator (XTI, XTO) VDD = VDDAC = 3.00 to 5.25 V, VSS = VSSAC = 0 V, Ta = −40 to 85 °C External clock input (XTI) VDD = VDDAC = 3.00 to 5.25 V, VSS = VSSAC = 0 V, Ta = −40 to 85 °C Internal system clock The crystal oscillator frequency or external clock input master clock frequency ratings are described in the pre- ceding tables, but it is the internal system clock frequency rating, set by the internal frequency divider (CKDV1, CKDV2), that must be satisfied. The master clock frequency is a multiple of the sampling frequency fs. CKDV1 = CKDV2 = LOW (internal system clock frequency = XTI input frequency), VSS = VSSAC = 0 V, Ta = −40 to 85 °C P arameter Symbol Condition Rating Unit min typ m a x Oscillator frequency1 1. External circuit components should be matched for the crystal oscillator element used. fOSC – – 5 0 MHz P arameter Symbol Condition Rating Unit min typ m a x Master clock frequency fXTI – – 6 0 MHz Master clock duty 1/2VDD thresholds 4 0 – 6 0 % P arameter Symbol Condition Rating Unit min typ m a x 256fs (CKSLN = LOW , CKDV1 = LOW , CKDV2 = LOW ) System clock frequency fSYS1 V DD = V DDAC = 4.50 to 5.25 V 0.256 – 27.6 MHz V DD = V DDAC = 3.00 to 5.25 V 0.256 – 2 5 192fs (CKSLN = HIGH, CKDV1 = LOW , CKDV2 = LOW ) System clock frequency fSYS2 V DD = V DDAC = 4.75 to 5.25 V, Ta = −40 to 70 °C 0.384 – 3 7 MHz V DD = V DDAC = 3.00 to 5.25 V 0.384 – 20.7 |
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