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5028B5 Datasheet(PDF) 8 Page - Nippon Precision Circuits Inc |
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5028B5 Datasheet(HTML) 8 Page - Nippon Precision Circuits Inc |
8 / 13 page WF5028 series SEIKO NPC CORPORATION —8 AC Characteristics VDD = 0.8 to 2.0V, VSS = 0V, Ta = −40 to +85°C unless otherwise noted. Timing chart Parameter Symbol Condition Rating Unit min typ max Output rise time tr1 Measurement cct 1, CL = 15pF, 0.2VDD to 0.8VDD VDD = 1.1 to 2.0V – 1.3 3.0 ns tr2 VDD = 0.8 to 1.1V – 1.7 4.0 ns Output fall time tf1 Measurement cct 1, CL = 15pF, 0.8VDD to 0.2VDD VDD = 1.1 to 2.0V – 1.3 3.0 ns tf2 VDD = 0.8 to 1.1V – 1.7 4.0 ns Output duty cycle Duty Measurement cct 1, Ta = 25 °C, CL = 15pF 45 50 55 % Output disable delay time tOD Measurement cct 2, Ta = 25 °C, CL ≤ 15pF – – 50 µs Figure 1. Output switching waveform When INHN goes HIGH to LOW, the Q output goes HIGH once and then becomes high impedance. When INHN goes LOW to HIGH, the Q output goes from high impedance to normal output operation when the oscillation starts (oscillation is detected). *) The high-impedance interval in the figure is shown as a LOW level due to the 1k Ω pull-down resistor connected to the Q pin (see "Measurement circuit 2" in the "Measurement Circuits" section). Figure 2. Output disable and oscillation start timing chart 0.8VDD Q DUTY measurement voltage (0.5V DD ) TW tr tf T 0.2VDD 0.8VDD 0.2VDD DUTY= TW/ T 100 (%) Q INHN tOD tSTR VIH VIL 0.1V Hi-Z* Normal operation Normal operation Output stopped |
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