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TUSB8044AI 数据表(PDF) 22 Page - Texas Instruments |
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TUSB8044AI 数据表(HTML) 22 Page - Texas Instruments |
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22 / 63 page ![]() CLOCK XI XO R1 1M Y1 24 MHz CL1 CL2 22 TUSB8044A SLLSF92 – FEBRUARY 2019 www.ti.com Product Folder Links: TUSB8044A Submit Documentation Feedback Copyright © 2019, Texas Instruments Incorporated 8.3.6 Clock Generation The TUSB8044A accepts a crystal input to drive an internal oscillator or an external clock source. If a clock is provided to XI instead of a crystal, XO is left open. Otherwise, if a crystal is used, the connection needs to follow the guidelines below. Since XI and XO are coupled to other leads and supplies on the PCB, it is important to keep them as short as possible and away from any switching leads. It is also recommended to minimize the capacitance between XI and XO. This can be accomplished by shielding C1 and C2 with the clean ground lines. Figure 2. TUSB8044A Clock |
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