Integrated USB 2.0 Compatible 4-Port Hub
Datasheet
Revision 2.3 (08-27-07)
44
SMSC USB2504/USB2504A
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
DD33
= 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
4 Ports
I
FCC1
I
FCC2
I
FCC3
I
FCC4
150
155
160
165
mA
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
8
pF
Output Capacitance
C
OUT
12
pF
Table 8.1 DC Electrical Characteristics (continued)
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
COMMENTS
