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UPD30500 Datenblatt(PDF) 17 Page - NEC |
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UPD30500 Datenblatt(HTML) 17 Page - NEC |
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17 / 36 page ![]() µPD30500, 30500A, 30500B 17 Data Sheet U12031EJ4V0DS00 Power Application Sequence Two kinds of power sources are provided with the VR5000A. The sequence of the power application order is not fixed. However, make sure that either of the power supplies does not remain turned on for 1 second or more while the other remains off. Parameter Symbol Condition MIN. MAX. Unit Power application delay tDP 0 1 sec Capacitance Parameter Symbol Condition MIN. MAX. Unit Input capacitance CIn 5pF Output capacitance Cout 7pF AC Characteristics (TC = 0 to +85 °C, VDDIO = 3.3 V ±5%, VDD = 2.5 V ±5%) Clock parameter Parameter Symbol Condition MIN. MAX. Unit System clock high-level width tCH 3.0 ns System clock low-level width tCL 3.0 ns System clock frequencyNotes 1, 2 20 100 MHz System clock cycle tCP 10 50 ns System clock jitter tji System clock frequency > 66 MHz ±125 ps System clock frequency ≤ 66 MHz ±250 ps System clock rise time tCR 2.0 ns System clock fall time tCF 2.0 ns Mode clock cycle tMOC 256 × tCP ns Notes 1. The operation of the VR5000A is guaranteed only when the PLL is operating 2. The operation is guaranteed if the internal operating frequency 100 MHz or higher. |
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