USB2240 datasheet(31/43 Pages) MICROCHIP

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DS00001979A-page 31

USB224X

9.0

DC PARAMETERS

9.1

Maximum Ratings

Note 9-1

Stresses above the specified parameters may cause permanent damage to the device. This is a

stress rating only and functional operation of the device at any condition above those indicated in the

operation sections of this specification is not implied.

Note 9-2

When powering this device from laboratory or system power supplies, it is important that the absolute

maximum ratings not be exceeded or device failure can result. Some power supplies exhibit voltage

spikes on their outputs when the AC power is switched on or off. In addition, voltage transients on

the AC power line may appear on the DC output. When this possibility exists, it is suggested that a

clamp circuit be used.

Parameter

Symbol

MIN

MAX

Units

Comments

Storage

Temperature

-55

150

°C

Lead

Temperature

°C

Please refer to JEDEC

specification J-STD-020D.

3.3 V supply

voltage

VDD33

-0.5

4.0

Voltage on

USB+ and USB-

pins

-0.5

(3.3 V supply voltage + 2)

≤ 6V

Voltage on

CRD_PWR

-0.5

VDD33 + 0.3

When internal power FET

operation of this pin is enabled,

this pin may be simultaneously

shorted to ground or any voltage

up to 3.63 V indefinitely, without

damage to the device as long as

VDD33 and VDDA33 are less than

3.63 V and TA is less than 70

oC.

Voltage on any

signal pin

-0.5

VDD33 + 0.3

Voltage on

XTAL1

-0.5

3.6

Voltage on

XTAL2

-0.5

VDD18 + 0.3

FIGURE 9-1:

SUPPLY RISE TIME MODEL

t10%

10%

90%

Voltage

tRT

t90%

Time

100%

3.3 V

VSS

VDD33

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