Datasheet

USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB251x 65 Revision 1.1 (04-26-10)
DATASHEET
USB251x/xi/xA/xAi
Supply Current Configured
Hi-Speed Host, each additional
downstream port
1 port
base
+
15 mA
1 port
base
+
40 mA
mA
USB251xB/xBi
Supply Current Configured
Hi-Speed Host, each additional
downstream port
1 port
base
+
25 mA
1 port
base
+
25 mA
mA
Table 9.5 Supply Current Configured: Full-Speed Host (I
FCC1
)
PART MIN TYP MAX UNITS COMMENTS
USB2512 105 125 mA This is the base current of one
downstream port.
USB2512i 105 135
USB2512A 95 115
USB2512Ai 95 125
USB2512B 45 50
USB2512Bi 45 55
USB2513 125 135
USB2513i 125 140
USB2513B 50 55
USB2513Bi 50 60
USB2514 140 150
USB2514i 140 155
USB2514B 50 60
USB2514Bi 50 65
USB2517 215 220
USB2517i 215 225
USB251x/xi/xA/xAi
Supply Current Configured
Full-Speed Host, each additional
downstream port
1 port
base
+
0 mA
1 port
base
+
0 mA
mA
There is no additional current for
additional ports.
USB251xB/xBi
Supply Current Configured
Full-Speed Host, each additional
downstream port
1 port
base
+
8 mA
1 port
base
+
8 mA
mA
Table 9.4 Supply Current Configured: Hi-Speed Host (I
HCH1
)
PART MIN TYP MAX UNITS COMMENTS