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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SPC560B64x датащи(PDF) 89 Page - STMicroelectronics |
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SPC560B64x датащи(HTML) 89 Page - STMicroelectronics |
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89 / 133 page  DocID15131 Rev 9 89/133 SPC560B54x/6x Electrical characteristics 132 Figure 11. Crystal oscillator and resonator connection scheme C2 C1 XTAL EXTAL XTAL EXTAL DEVICE DEVICE DEVICE XTAL EXTAL I R VDD 2. A series resistor may be required, according to crystal oscillator supplier recommendations. 1. XTAL/EXTAL must not be directly used to drive external circuits Notes: Table 37. Crystal description Nominal frequency (MHz) NDK crystal reference Crystal equivalent series resistance ESR Crystal motional capacitance (Cm) fF Crystal motional inductance (Lm) mH Load on xtalin/xtalout C1 = C2 (pF)(1) Shunt capacitance between xtalout and xtalin C0(2) (pF) 4 NX8045GB 300 2.68 591.0 21 2.93 8 NX5032GA 300 2.46 160.7 17 3.01 10 150 2.93 86.6 15 2.91 12 120 3.11 56.5 15 2.93 16 120 3.90 25.3 10 3.00 1. The values specified for C1 and C2 are the same as used in simulations. It should be ensured that the testing includes all the parasitics (from the board, probe, crystal, etc.) as the AC / transient behavior depends upon them. 2. The value of C0 specified here includes 2 pF additional capacitance for parasitics (to be seen with bond-pads, package, etc.). |
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