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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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STPCI2HEYC датащи(PDF) 88 Page - STMicroelectronics |
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STPCI2HEYC датащи(HTML) 88 Page - STMicroelectronics |
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88 / 111 page  DESIGN GUIDELINES 88/111 Issue 1.0 - July 24, 2002 6.3.10. USB INTERFACE The STPC integrates a USB host interface with a 2-port Hub. The only external device needed are the ESD protection circuits USBDF01W5 and a USB power supply controller. Figure 6-16 describes a typical implementation using these devices. Figure 6-16. Typical USB implementation Note 1; The ESD protection will be adequate for most applications. In some instances, problems may occur if the devices on the USB chain do not have enough power to drive the signals adequately. We therefore recommend that you replace the part with de- screte components and reduce the value of the capacitor. POWERON STPC TPS2014 OC USBDMNS[0] USBDPLS[0] USBDMNS[1] USBDPLS[1] 5V Connector GND 9 10 11 12 1 2 6 7 3 4 8 5 100nF 2x 47uF 5 4 6,7,8 5V 2,3 1 USBVCC 100nF 5V TPS2014 Power Decoupling R = 15 Ohm1 R = 15 Ohm1 R = 15 Ohm 1 R = 15 Ohm1 USBDF02W5 (Note1) 3 1 2 4 5 USBDF02W5 (Note1) 3 1 2 4 5 |
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