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Integrated USB 2.0 Compatible 3-Port Hub
Datasheet
SMSC USB2503/USB2503A 41 Revision 2.3 (08-27-07)
DATASHEET
Notes:
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.
CAPACITANCE T
A
= 25°C; fc = 1MHz; V
DD33CR
= 3.3V
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.
Supply Current
Configured
(Full-Speed Host)
1 Port
2 Ports
3 Ports
I
FCC1
I
FCC2
I
FCC3
150
155
160
mA
mA
mA
Total from all supplies
Supply Current
Suspend
I
CSBY
265 uA Total from all supplies.
Supply Current
Reset
I
RST
150 uA Total from all supplies.
LIMITS
PARAMETER SYMBOL MIN TYP MAX UNIT TEST CONDITION
Clock Input
Capacitance
C
IN
12 pF All pins except USB pins (and pins under
test tied to AC ground)
Input Capacitance C
IN
8pF
Output Capacitance C
OUT
12 pF
Table 7.1 DC Electrical Characteristics (continued)
PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS