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DS000002249A-page 33

USB2503/USB2503A

Note 1:

Output leakage is measured with the current pins in high impedance.

2:

See USB 2.0 Specification for USB DC electrical characteristics.

3:

RBIAS is a 3.3V tolerant analog pin.

Power Sequencing

There are no power supply sequence restrictions for the Hub. The order in which power supplies power-up and power-

down is implementation dependent.

IO-U

(Note 2)

I-R

(Note 3)

Supply Current Unconfigured

High-Speed Host

Full-Speed Host

100

95

mA

mA

Supply Current

Configured

(High-Speed Host)

2 Ports @ FS/LS

2 Ports @ HS

1 Port HS, 1 Port FS/LS

3 Ports @ HS

190

235

215

265

mA

mA

mA

mA

Total from all supplies

Supply Current

Configured

(Full-Speed Host)

1 Port

2 Ports

3 Ports

150

155

160

mA

mA

mA

Total from all supplies

Supply Current

Suspend

265

uA

Total from all supplies.

Supply Current

Reset

150

uA

Total from all supplies.

Limits

Parameter

Symbol

MIN

TYP

MAX

Unit

Test Condition

Clock Input Capacitance

12

pF

All pins except USB pins (and pins under

test tied to AC ground)

Input Capacitance

8pF

Output Capacitance

12

pF

TABLE 7-1:

DC ELECTRICAL CHARACTERISTICS (CONTINUED)

Parameter

Symbol

MIN

TYP

MAX

Units

Comments