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USB333X датащи(PDF) 70 Page - Microchip Technology

номер детали USB333X
подробное описание детали  Industry?셲 Smallest Hi-Speed USB Transceiver with Single Supply Operation
PDF  85 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB333X датащи(HTML) 70 Page - Microchip Technology

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USB333x
DS00001880A-page 70
 2009 - 2015 Microchip Technology Inc.
8.0
APPLICATION NOTES
8.1
Application Diagram
The USB333x requires few external components as shown in the application diagrams. The USB 2.0 Specification
restricts the voltage at the VBUS pin to a maximum value of 5.25V. In some applications, the voltage will exceed this
limit, so the USB333x provides an integrated over voltage protection circuit. The over voltage protection circuit works
with an external resistor (RVBUS) to lower the voltage at the VBUS pin.
TABLE 8-1:
COMPONENT VALUES IN APPLICATION DIAGRAMS
Reference
Designator
Value
Description
Notes
COUT
See Table 4-12
Bypass capacitor to ground (<1
Ω ESR) for
regulator stability.
Place as close as possible to the
PHY.
CVBUS
See Table 8-2
Capacitor to ground required by the USB
Specification. Microchip recommends <1
Ω
ESR.
Place near the USB connector.
CBYP
System
dependent.
Bypass capacitor to ground. Typical
values used are 0.1 or 0.01
μF.
Place as close as possible to the
PHY.
RVBUS
1k
Ω or 20kΩ
Series resistor to work with internal over
voltage protection.
See Section 5.6.2.6 for information
regarding power dissipation.
RBIAS
8.06k
Ω (±1%)
Series resistor to establish reference
voltage.
See Section 5.3 for information
regarding power dissipation.
TABLE 8-2:
CAPACITANCE VALUES AT VBUS OF USB CONNECTOR
Mode
MIN Value
MAX Value
Host
120
μF
Device
1
μF10μF
OTG
1
μF6.5μF



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