USB2640 datasheet(47/60 Pages) MICROCHIP

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DS00001947C-page 47

USB2640/USB2641

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. 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 the Absolute Maximum Ratings

must 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, a clamp circuit should be used.

Parameter

Symbol

MIN

MAX

Units

Comments

Storage

Temperature

TSTOR

-55

150

°C

Lead

Temperature

325

°C

Soldering < 10 seconds

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 these pins are

enabled, these pins may be

simultaneously shorted to

ground or any voltage up to

3.63 V indefinitely, without

damage to the device as

long as VDD33 is less than

3.63 V and TA is less than

70oC.

Voltage on any

signal pin

-0.5

VDD33 + 0.3

Voltage on

XTAL1

-0.5

3.6

Voltage on

XTAL2

-0.5

2.0

HBM ESD

Performance

5kV

FIGURE 9-1:

SUPPLY RISE TIME MODELS

t10%

10%

90%

Voltage

tRT

t90%

Time

100%

3.3 V

VSS

VDD33

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