ASIX ELECTRONICS CORPORATION

27

AX88772A/AX88172A

Low-pin-count

USB 2.0 to 10/100M Fast Ethernet Controller

9.3 Power-up Sequence

At power-up, the AX88772A/AX88172A requires the VCC3R3/VCC3IO/VCC3A3/VCC33A_H/ VCC33A_PLL power

supply to rise to nominal operating voltage within Trise3 and the V18F/VCCK/VCC18A power supply to rise to nominal

operating voltage within Trise2.

Symbol

Parameter

Condition

Min

Typ

Max

Unit

3.3V power supply rise time

From 0V to 3.3V

0.5

-

10

ms

1.8V power supply rise time

From 0V to 1.8V

-

-

10

ms

3.3V rise to 1.8V rise time delay

-5

-

5

ms

0V

3.3V

Trise3

0V

1.8V

Trise2

Tdelay32

V18F/VCCK/VCC18A

VCC3R3/VCC3IO/VCC3A3

/VCC33A_H/ VCC33A_PLL