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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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MB90F474LPF 데이터시트(PDF) 87 Page - fujitsu semiconductor |
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MB90F474LPF 데이터시트(HTML) 87 Page - fujitsu semiconductor |
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87 / 118 page  MB90470 Series 87 4. AC Characteristics (1) Clock Timing Ratings (VSS = 0.0 V, TA = −40 °C to +85 °C) *1 : VCC = VCC3 = VCC5 *2 : Observe the operating voltage with care. Parameter Sym- bol Pin name Conditions Value Unit Remarks Min Typ Max Clock frequency FCH X0, X1 3 20 MHz for crystal oscillation*2 3 40 for external clock FCL X0A, X1A 32.768 kHz Clock cycle time tC X0, X1 25 333 ns *2 tCL X0A, X1A 30.5 µs Input clock pulse width PWH PWL X0 5 ns *1 PWLH PWLL X0A 15.2 µs*1 Input clock rise, fall time tcr tcf X0 5ns Using external clock Internal operating clock frequency fCP 1.5 20 MHz *2 1.5 16 MHz MB90474 only fCPL 8.192 kHz 3 20 MHz MB90F474H 3 12 MHz MB90F474L Internal operating clock cycle time tCP 50.0 666 ns *2 62.5 666 ns MB90474 only tCPL 122.1 µs |
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