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SM8706A Datasheet(PDF) 4 Page - Nippon Precision Circuits Inc |
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SM8706A Datasheet(HTML) 4 Page - Nippon Precision Circuits Inc |
4 / 8 page SM8706A NIPPON PRECISION CIRCUITS—4 AC Electrical Characteristics fXTAL = 36.8640MHz, VDD = 3.0V ± 0.3V, VSS = 0V, Ta = – 40 to 85 °C unless otherwise noted. Parameter Symbol Condition Rating Unit min typ max External input clock frequency1 1. When using an external clock input, the XTI duty should be 50% with 3.3V clock signal amplitude level. The input signal voltage should not exceed the absolute maximum rating, otherwise damage may occur. fXTI XTI, applies to external clock input use only – 36.8640 – MHz Output clock rise time2 2. The numeric values are measured values obtained using the circuit in Figure 1 and the NPC standard evaluation board. tr MO1, SO1, SO2, CL = 25 pF, transition between VOL = 0.2VDD and VOH = 0.8VDD – 2.0 – ns Outputs excluding MO1, SO1, SO2, and XTO, CL = 15pF, transition between VOL = 0.2VDD and VOH = 0.8VDD – 2.0 – Output clock fall time2 tf MO1, SO1, SO2, CL = 25pF, transition between VOH = 0.8VDD and VOL = 0.2VDD – 2.0 – ns Outputs excluding MO1, SO1, SO2, and XTO, CL = 15pF, transition between VOH = 0.8VDD and VOL = 0.2VDD – 2.0 – Output clock jitter3 3. The numeric values are measured values obtained using the circuit in Figure 2 and the NPC standard evaluation board. tjitter (1-sigma) MO1, SO1, SO2, Ta = 25 °C, CL = 25pF, VO = 0.5VDD –40– ps Outputs excluding MO1, SO1, SO2, and XTO, Ta = 25 °C, CL = 15pF, VO = 0.5VDD –40– Output clock duty cycle2 Dt MO1, SO1, SO2, Ta = 25 °C, CL = 25pF, VO = 0.5VDD 45 50 55 % Outputs excluding MO1, SO1, SO2, and XTO, Ta = 25 °C, CL =15 pF, VO = 0.5VDD 45 50 55 Settling time2 tS All outputs excluding XTO – – 1 µs Power-up time2,4 4. This is the time, after the supply is turned ON from the OFF state, until the output clock reaches ± 0.1% of the specified frequency. tP All outputs excluding XTO – 1 5 ms Figure 1. Measurement circuit 1 Frequency & Time Interval Analyzer (HP5371A) 36.864MHz Oscilloscope (Infinium HP54845A) Passive Probe (HP10435A) Active Probe (HP1152A) DUT DUT:Device under testing Figure 2. Measurement circuit 2 Jitter Measurement System (ASA, M1) 36.864MHz Oscilloscope (HP54720D +HP54721A) Active Probe (HP54701A) DUT DUT:Device under testing |
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