USB2642 datasheet(42/56 Pages) MICROCHIP

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DS00001578C-page 43

USB2642

8.0

DC PARAMETERS

8.1

Maximum Guaranteed Ratings

Stresses above the specified parameters may cause permanent damage to the device. This is a stress rating only. Func-

tional operation of the device at any condition above those indicated in the operation sections of this specification is not

implied. 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.

8.2

Operating Conditions

Note 1:

0°C for commercial version, -40°C for industrial version.

Parameter

Symbol

Min

Max

Units

Comments

Storage

Temperature

TSTOR

-55

150

°C

3.3 V supply

voltage

VDD33,

VDDA33

-0.5

4.0

Voltage on

CRD_PWD

--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 and VDDA33

are 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

Parameter

Symbol

Min

Max

Units

Comments

Operating Temperature

Note 1

Note 2

°C

Ambient temperature in still air.

(See Note 3)

3.3 V supply voltage

VDD33,

VDDA33

3.0

3.6

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.

3.3 V supply rise time

tRT

0400

µs

(Figure 8-1)

1.8 V supply rise time

tRT

0400

µs

(Figure 8-1)

Voltage on any signal

--0.3

VDD33

Voltage on XTAL1

-0.3

2.0

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