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USB2251 Datasheet(PDF) 35 Page - Microchip Technology

No. de pieza USB2251
Descripción Electrónicos  Ultra Fast USB 2.0 Multi-Slot Flash Media Controller
PDF  43 Pages
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Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

USB2251 Datasheet(HTML) 35 Page - Microchip Technology

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USB2250/50i/51/51i
DS00002005A-page 35
 2009 - 2015 Microchip Technology Inc.
Note 9-3
When powering the device, the maximum power supply ramp time should be set at a rate faster than
400
s. This speed is important to ensure that the device resets properly. Measure rise time at 10%
and 90%.
9.2
Operating Conditions
Note 9-4
A 3.3 V regulator with an output tolerance of 1% must be used if the output of the internal power
FET’s must support a 5% tolerance.
9.3
DC Electrical Characteristics
Parameter
Symbol
MIN
MAX
Units
Comments
Operating
Temperature
Commercial Part
Industrial Part
TA
TA
0
-40
70
85
°C
°C
Ambient temperature in still air.
3.3 V supply voltage
VDD33
3.0
3.6
V
(Note 9-4)
3.3 V supply rise time
tRT
0
400
s
(See Figure 9-1 and Note 9-3)
Voltage on
USB+ and USB- pins
-0.3
5.5
V
If any 3.3 V supply voltage drops
below 3.0 V, then the MAX
becomes:
(3.3 V supply voltage) + 0.5
5.5
Voltage on any signal
pin
-0.3
VDD33
V
Voltage on XTAL1
-0.3
VDD33
V
Voltage on XTAL2
-0.3
VDD18
V
Parameter
Symbol
MIN
TYP
MAX
Units
Comments
I, IPU, IPD Type Input Buffer
Low Input Level
High Input Level
Pull Down
Pull Up
VILI
VIHI
PD
PU
2.0
72
58
0.8
V
V
A
A
TTL Levels
IS Type Input Buffer
Low Input Level
High Input Level
Hysteresis
VILI
VIHI
VHYSI
2.0
420
0.8
V
V
mV
TTL Levels
ICLK Input Buffer
Low Input Level
High Input Level
Input Leakage
VILCK
VIHCK
IIL
1.4
-10
0.5
+10
V
V
A
VIN = 0 to VDD33



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