USB2533 datasheet(41/50 Pages) MICROCHIP

41 / 50 page

USB 2.0 Hi-Speed 3-Port Hub Controller

Datasheet

 2014 Microchip Technology Inc.

DS00001702A-page 41

9.2

Operating Conditions**

+3.3 V Supply Voltage (VDD33, VDDA33) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3.0 V to 3.6 V

Power Supply Rise Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Note 9.4

Ambient Operating Temperature in Still Air (TA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Note 9.5

Note 9.4

The power supply rise time requirements vary dependent on the usage of the external

reset (RESET_N). If RESET_N is asserted at power-on, the power supply rise time must

be 10mS or less (tRT(max) = 10mS). If RESET_N is not used at power-on (tied high), the

power supply rise time must be 1mS or less (tRT(max) = 1mS). Figure 9.1 illustrates the

supply rise time requirements.

Note 9.5

0oC to +70oC for commercial version, -40oC to +85oC for industrial version.

**Proper operation of the device is guaranteed only within the ranges specified in this section.

Figure 9.1 Supply Rise Time Model

t10%

10%

90%

Voltage

tRT

t90%

Time

100%

3.3V

VSS

VDDA33

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