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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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USB5806 датащи(PDF) 51 Page - Microchip Technology |
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USB5806 датащи(HTML) 51 Page - Microchip Technology |
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51 / 60 page  2016-2018 Microchip Technology Inc. DS00002236D-page 51 USB5806 Note 6: Frequency Deviation Over Time is also referred to as Aging. Note 7: 0 °C for commercial version, -40 °C for industrial version. Note 8: +70 °C for commercial version, +85 °C for industrial version. Note 9: This number includes the pad, the bond wire and the lead frame. PCB capacitance is not included in this value. The XTALI/CLKIN pin, XTALO pin and PCB capacitance values are required to accurately calculate the value of the two external load capacitors. These two external load capacitors determine the accuracy of the 25.000 MHz frequency. 9.7.2 EXTERNAL REFERENCE CLOCK (CLKIN) When using an external reference clock, the following input clock specifications are suggested: •25 MHz • 50% duty cycle ±10%, ±100 ppm • Jitter < 100 ps RMS Load Capacitance CL - 20 typ - pF Drive Level PW 100 - - uW Equivalent Series Resistance R1 -- 60 Ω Operating Temperature Range Note 7 - Note 8 oC XTALI/CLKIN Pin Capacitance - 3 typ - pF Note 9 XTALO Pin Capacitance - 3 typ - pF Note 9 TABLE 9-10: CRYSTAL SPECIFICATIONS (CONTINUED) PARAMETER SYMBOL MIN NOM MAX UNITS NOTES |
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