USB3450 datasheet(15/40 Pages) SMSC

15 / 40 page

Hi-Speed USB Host or Device PHY With UTMI+ Interface

Datasheet

SMSC USB3450

Revision 0.1 (05-11-05)

DATASHEET

Chapter 4 Limiting Values

Note: Stresses above those listed could cause damage to the device. This is a stress rating only and

functional operation of the device at any other condition above those indicated in the operation

sections of this specification is not implied. 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. If this possibility exists, it is suggested that a clamp circuit be used.

Table 4.1 Maximum Guaranteed Ratings

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Maximum VBUS, ID, DP,

and DM voltage to GND

VMAX_5V

-0.5

+5.5

Maximum VDD1.8 and

VDDA1.8 voltage to

Ground

VMAX_1.8V

-0.5

2.5

Maximum 3.3V supply

voltage to Ground

VMAX_3.3V

-0.5

4.0

Maximum I/O voltage to

Ground

VMAX_IN

-0.5

4.0

Operating Temperature

TMAX_OP

070

Storage Temperature

TMAX_STG

-55

150

Table 4.2 Recommended Operating Conditions

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

3.3V Supply Voltage

VDD3.3

3.0

3.3

3.6

Input Voltage on Digital Pins

0.0

VDD3.3

Input Voltage on Analog I/O

Pins (DP, DM)

VI(I/O)

0.0

VDD3.3

Ambient Temperature

0+70

Table 4.3 Recommended External Clock Conditions

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

System Clock Frequency

XI driven by the external clock;

and no connection at XO

(±100ppm)

MHz

System Clock Duty Cycle

XI driven by the external clock;

and no connection at XO

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