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USB334X 数据表(PDF) 22 Page - Microchip Technology

部件名 USB334X
功能描述  Enhanced Single Supply Hi-Speed USB ULPI Transceiver
PDF  92 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB334X 数据表(HTML) 22 Page - Microchip Technology

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USB334x
DS00002646A-page 22
 2009-2018 Microchip Technology Inc.
4.11
Regulator Output Voltages and Capacitor Requirement
4.12
Piezoelectric Resonator for Internal Oscillator
The internal oscillator may be used with an external quartz crystal or ceramic resonator as described in Section 5.4,
"Crystal Reference Support (USB3343 only)," on page 28. See Table 4-13 for the recommended crystal specifications.
Note 4-9
The required bit rate accuracy for Hi-Speed USB applications is ±500 ppm as provided in the USB
2.0 Specification. This takes into account the effect of voltage, temperature, aging, etc.
TABLE 4-12:
REGULATOR OUTPUT VOLTAGES AND CAPACITOR REQUIREMENT
Parameter
Symbol
Conditions
MIN
TYP
MAX
Units
Regulator Output Voltage
VDD33
5.5V > VBAT > 3.0V
2.8
3.3
3.6
V
USB UART Mode & UART
RegOutput[1:0] = 01
6V > VBAT > 3.0V
2.7
3.0
3.3
V
USB UART Mode & UART
RegOutput[1:0] = 10
6V > VBAT > 3.0V
2.47
2.75
3.03
V
USB UART Mode & UART
RegOutput[1:0] = 11
6V > VBAT > 3.0V
2.25
2.5
2.75
V
Regulator Bypass Capacitor
COUT33
1.0
µF
Bypass Capacitor ESR
CESR33
1
Ω
Regulator Output Voltage
VDD18
3.6V > VDD33 > 2.25V
1.6
1.8
2.0
V
Regulator Bypass Capacitor
COUT18
1.0
µF
Bypass Capacitor ESR
CESR18
1
Ω
TABLE 4-13:
USB334X QUARTZ CRYSTAL SPECIFICATIONS
Parameter
Symbol
MIN
NOM
MAX
Units
Notes
Crystal Cut
AT, typ
Crystal Oscillation Mode
Fundamental Mode
Crystal Calibration Mode
Parallel Resonant Mode
Frequency
Ffund
-See
Example a
on page 79
-MHz
Total Allowable PPM Budget
-
-
±500
PPM
Note 4-9
Shunt Capacitance
CO
-7 typ-
pF
Load Capacitance
CL
-
20 typ
-
pF
Drive Level
PW
0.1
-
-
µW
Equivalent Series Resistance
R1
--
30
Ω
USB334x REFCLK Pin
Capacitance
-3 typ-
pF
Note 4-10
USB334x XO Pin Capacitance
-
3 typ
-
pF
Note 4-10



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