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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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USB5926C/KD датащи(PDF) 56 Page - Microchip Technology |
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USB5926C/KD датащи(HTML) 56 Page - Microchip Technology |
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56 / 66 page  USB5926 DS00002234E-page 56 2016-2021 Microchip Technology Inc. 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. 10.7.2 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 Total Allowable PPM Budget - - ±100 PPM Note 7 Shunt Capacitance CO - 7 typ - pF 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 10-10: CRYSTAL SPECIFICATIONS (CONTINUED) PARAMETER SYMBOL MIN NOM MAX UNITS NOTES |
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