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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UCD3138 датащи(PDF) 69 Page - Texas Instruments |
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UCD3138 датащи(HTML) 69 Page - Texas Instruments |
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69 / 99 page  Figure 11-1. V33 Voltage Dip When POR is Activated From the Figure 11-1 recommendations, the slew rate using the 2.2 uF/1uF capacitor combination requires that the slew rate must be as follows: (1) 11.4 Recommendation for RC Time Constant of RESET Pin for UCD3138 and UCD3138064 Ideally, the ARM core should begin execution of ROM code only after V33>3V. The ROM code reads trim values and loads trim registers. Lack of sufficient voltage during this operation can result in unexpected device functioning. Depending on V33 slew rate, the duration for which there is insufficient voltage on V33 is varied. During this time, a reliable trim operation is not ensured. Applying an RC filter between V33 and the RESET pin can increase the delay from V33 power up to the device coming out of reset. www.ti.com UCD3138 SLUSAP2J – MARCH 2012 – REVISED NOVEMBER 2021 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 69 Product Folder Links: UCD3138 |
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