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USB3250 数据表(PDF) 10 Page - Microchip Technology

部件名 USB3250
功能描述  Hi-Speed USB Device Transceiver with UTMI Interface
PDF  46 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

USB3250 数据表(HTML) 10 Page - Microchip Technology

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USB3250
DS00002142A-page 10
2013 - 2016 Microchip Technology Inc.
5.0
LIMITING VALUES
Note 5-1
The USB 2.0 Specification requires a frequency accuracy of +/-500ppm. For applications using a
quartz crystal, Microchip recommends that it be specified with an accuracy of +/-100ppm. Resonators
that are specified to meet the +/-500ppm accuracy have also been used successfully with the
USB3250.
FIGURE 5-1:
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Conditions
MIN
TYP
MAX
Units
1.8V Supply Voltage
(VDD1.8 and VDDA1.8)
VDD1.8
-0.5
TBD
V
3.3V Supply Voltage
(VDD3.3 and VDDA3.3)
VDD3.3
-0.5
4.6
V
Input Voltage
VI
-0.5
4.6
V
Storage Temperature
TSTG
-40
+125
oC
[1] Equivalent to discharging a 100pF capacitor via a 1.5k
 resistor (HBM).
Note:
In accordance with the Absolute Maximum Rating System (IEC 60134).
FIGURE 5-2:
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Conditions
MIN
TYP
MAX
Units
1.8V Supply Voltage
(VDD1.8 and VDDA1.8)
VDD1.8
1.6
1.8
2.0
V
3.3V Supply Voltage
(VDD3.3 and VDDA3.3)
VDD3.3
3.0
3.3
3.6
V
Input Voltage on Digital Pins
VI
0.0
VDD3.3
V
Input Voltage on Analog I/O
Pins (DP, DM)
VI(I/O)
0.0
VDD3.3
V
Ambient Temperature
TA
-40
+85
oC
FIGURE 5-3:
RECOMMENDED EXTERNAL CLOCK CONDITIONS
Parameter
Symbol
Conditions
MIN
TYP
MAX
Units
System Clock Frequency
XO driven by the external
clock; and no connection
at XI
12
(+/- 100ppm)
Note 5-1
MHz
System Clock Duty Cycle
XO driven by the external
clock; and no connection
at XI
45
50
55
%



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