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USB7016-I/KDX Scheda tecnica(PDF) 49 Page - Microchip Technology

Il numero della parte USB7016-I/KDX
Spiegazioni elettronici  6-Port USB 3.2 Gen 1 SmartHubTM Controller
PDF  60 Pages
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Produttore elettronici  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB7016-I/KDX Scheda tecnica(HTML) 49 Page - Microchip Technology

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2022 Microchip Technology Inc. and its subsidiaries
DS00003740B-page 49
USB7016
9.7
Clock Specifications
The device can accept either a 25MHz crystal or a 25MHz single-ended clock oscillator input. If the single-ended clock
oscillator method is implemented, XTALO should be left unconnected and XTALI/CLK_IN should be driven with a
nominal 0-3.3V clock signal. The input clock duty cycle is 40% minimum, 50% typical and 60% maximum.
It is recommended that a crystal utilizing matching parallel load capacitors be used for the crystal input/output signals
(XTALI/XTALO). The following circuit design (Figure 9-8) and specifications (Table 9-11) are required to ensure proper
operation.
9.7.1
CRYSTAL SPECIFICATIONS
It is recommended that a crystal utilizing matching parallel load capacitors be used for the crystal input/output signals
(XTALI/XTALO). Refer to Table 9-11 for the recommended crystal specifications.
FIGURE 9-8:
25MHZ CRYSTAL CIRCUIT
TABLE 9-11:
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
-
25.000
-
MHz
Frequency Tolerance @ 25oCFtol
-
-
±50
PPM
Frequency Stability Over Temp
Ftemp
-
-
±50
PPM
Frequency Deviation Over Time
Fage
-
±3 to 5
-
PPM
Note 7
Total Allowable PPM Budget
-
-
±100
PPM
Shunt Capacitance
CO
-
5 typ
-
pF
Load Capacitance
CL
-
10 typ
-
pF
Drive Level
PW
100
-
-
uW
Equivalent Series Resistance
R1
--
60
Ω
Operating Temperature Range
Note 8
-
Note 9
oC
XTALI/CLK_IN Pin Capacitance
-
3 typ
-
pF
Note 10
XTALO Pin Capacitance
-
3 typ
-
pF
Note 10
USB7016
XTALO
XTALI
Y1
C1
C2



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