ASIX ELECTRONICS CORPORATION

22

AX88772A/AX88172A

Low-pin-count

USB 2.0 to 10/100M Fast Ethernet Controller

9.0 Electrical Specifications

9.1 DC Characteristics

9.1.1

Absolute Maximum Ratings

Symbol

Parameter

Rating

Unit

VCCK

Digital core power supply

- 0.3 to 2.16

V

VCC18A

Analog Power. 1.8V

- 0.3 to 2.16

V

VCC3IO

Power supply of 3.3V I/O

- 0.3 to 4

V

VCC3R3

Power supply of on-chip voltage regulator

- 0.3 to 4

V

VCC3A3

Analog Power 3.3V for Ethernet PHY bandgap

- 0.3 to 3.8

V

VCC33A_PLL

Analog Power 3.3V for USB PLL.

- 0.3 to 4

V

VCC33A_H

Analog Power 3.3V for USB TX and RX

- 0.3 to 4

V

Input voltage of 1.8V I/O

- 0.3 to 2.16

V

Input voltage of 3.3V I/O

- 0.3 to 4.0

V

Input voltage of 3.3V I/O with 5V tolerant

- 0.3 to 5.8

V

Storage temperature

- 40 to 150

℃

DC input current

20

mA

Output short circuit current

20

mA

Note: Permanent device damage may occur if absolute maximum ratings are exceeded. Functional operation should be

restricted to the optional sections of this datasheet. Exposure to absolute maximum rating condition for extended periods

may affect device reliability.

9.1.2

Recommended Operating Condition

Symbol

Parameter

Min

Typ

Max

Unit

VCCK

Digital core power supply

1.62

1.8

1.98

V

VCC18A

Analog core power supply

1.62

1.8

1.98

V

VCC3R3

Power supply of on-chip voltage regulator

2.97

3.3

3.63

V

VCC3IO

Power supply of 3.3V I/O

2.97

3.3

3.63

V

VCC33A_H Analog Power 3.3V for USB TX and RX

2.97

3.3

3.63

V

VCC33A_PLL Analog Power 3.3V for USB PLL.

2.97

3.3

3.63

V

VCC3A3

Analog power supply for bandgap

2.97

3.3

3.63

V

Input voltage of 1.8 V I/O

0

1.8

1.98

V

Input voltage of 3.3 V I/O

0

3.3

3.63

V

Input voltage of 3.3 V I/O with 5V tolerance

0

3.3

5.25

V

Commercial junction operating temperature

0

25

125

℃

Commercial operating temperature

0

-

70

℃

Thermal Characteristics

Symbol

Parameter

Rating Unit

LQFP 64(AX88772A)

13.1 °C/W

Thermal resistance of junction

to case

TQFP 80(AX88172A)

27.5 °C/W

Still air,LQFP 64(AX88772A)

45.1 °C/W

Thermal resistance of junction

to ambient

Still air,TQFP 80(AX88172A)

55.2 °C/W