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USB3803 Datasheet(PDF) 86 Page - Microchip Technology

Part # USB3803
Description  USB 2.0 High-Speed Hub Controller Optimized
PDF  99 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB3803 Datasheet(HTML) 86 Page - Microchip Technology

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USB3803
DS00001691B-page 86
 2014-2015 Microchip Technology Inc.
11.0
APPLICATION REFERENCE
11.1
Application Diagram
The USB3803 requires several external components to function and insure compliance with the USB 2.0 specification.
TABLE 11-1:
COMPONENT VALUES IN APPLICATION DIAGRAMS
Reference
Designator
Value
Description
Notes
CVDD12BYP
1.0
μF
Capacitor to ground for regulator stability.
Place as close to the
USB3803 as possible
CVDD33BYP
4.7
μF
Capacitor to ground for regulator stability.
Place as close to the
USB3803 as possible
COUT
0.1
μF
Bypass capacitor to ground.
Place as close to the
USB3803 as possible
RBIAS
12.0k
Series resistor to establish reference
voltage used by analog circuits.
Place as close to the
USB3803 as possible
RPU1
10k or 1k
Pull-up for I2C bus. 10k for 100kHz or
400kHz operation. 1k for 1MHz opera-
tion.
RPU2
10k (or greater)
Pull-up for open-drain outputs
TABLE 11-2:
CAPACITANCE VALUES AT VBUS OF USB CONNECTOR
Port
MIN Value
MAX Value
Downstream
120
μF
Upstream
1
μF10μF



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