ASIX ELECTRONICS CORPORATION

23

AX88772A/AX88172A

Low-pin-count

USB 2.0 to 10/100M Fast Ethernet Controller

9.1.3

Leakage Current and Capacitance

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

Input current

No pull-up or pull-down

-10

±

1

10

μ

A

Tri-state leakage current

-10

±

1

10

μ

A

Input capacitance

-

2.2

-

pF

Output capacitance

-

2.2

-

pF

Bi-directional buffer capacitance

-

2.2

-

pF

Note: The capacitance listed above does not include pad capacitance and package capacitance. One can estimate pin

capacitance by adding a pad capacitance of about 0.5pF to the package capacitance.

9.1.4

DC Characteristics of 3.3V I/O Pins

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

VCC3IO

Power supply of 3.3V I/O

3.3V I/O

2.97

3.3

3.63

V

Tj

Junction temperature

0

25

125

℃

Vil

Input low voltage

-

-

0.8

V

Vih

Input high voltage

2.0

-

-

V

Vt

Switching threshold

LVTTL

1.5

V

Vt-

Schmitt trigger negative going

threshold voltage

0.8

1.1

-

V

Vt+

Schmitt

trigger

positive

going

threshold voltage

LVTTL

-

1.6

2.0

V

Vol

Output low voltage

Iol = 8mA

-

-

0.4

V

Voh

Output high voltage

Ioh = -8mA

2.4

-

-

V

Rpu

Input pull-up resistance

40

75

190

KΩ

Rpd

Input pull-down resistance

40

75

190

KΩ

Input leakage current

Vin = VCC3IO or 0

-10

±

1

10

μ

A

Input leakage current with pull-up

resistance

Vin = 0

-15

-45

-85

μ

A

Iin

Input

leakage

current

with

pull-down resistance

Vin = VCC3IO

15

45

85

μ

A

Tri-state output leakage current

-10

±

1

10

μ

A