Datasheet
Table Of Contents
- Chapter 1 USB251x Hub Family Differences Overview
- Chapter 2 General Description
- Chapter 3 Acronyms
- Chapter 4 Block Diagram
- Chapter 5 Pin Descriptions
- Chapter 6 LED Usage Description
- Chapter 7 Battery Charging Support
- Chapter 8 Configuration Options
- Chapter 9 DC Parameters
- 9.1 Maximum Guaranteed Ratings
- 9.2 Operating Conditions
- Figure 9.1 Supply Rise Time Model
- Table 9.1 DC Electrical Characteristics (continued)
- Table 9.2 Supply Current Unconfigured: Hi-Speed Host (ICCINTHS)
- Table 9.3 Supply Current Unconfigured: Full-Speed Host (ICCINTFS)
- Table 9.4 Supply Current Configured: Hi-Speed Host (IHCH1)
- Table 9.5 Supply Current Configured: Full-Speed Host (IFCC1)
- Table 9.6 USB251x/xi/xA/xAi Supply Current Suspend (ICSBY)
- Table 9.7 USB251xB/xBi Supply Current Suspend (ICSBY)
- Table 9.8 USB251x/xi/xA/xAi Supply Current Reset (ICRST)
- Table 9.9 USB251xB/xBi Supply Current Reset (ICRST)
- Table 9.10 Pin Capacitance for USB251x, USB251xi, USB251xA, USB251xAi
- Table 9.11 Pin Capacitance for USB251xB and USB251xBi
- 9.2.1 Package Thermal Specifications
- Chapter 10 AC Specifications
- Chapter 11 Package Outlines

USB 2.0 Hi-Speed Hub Controller
Datasheet
SMSC USB251x 63 Revision 1.1 (04-26-10)
DATASHEET
Note 9.3 Output leakage is measured with the current pins in high impedance.
Note 9.4 See USB 2.0 specification for USB DC electrical characteristics.
USB251x/xi/xA/xAi
ICLK Input Buffer
Low Input Level
High Input Level
Input Leakage
V
ILCK
V
IHCK
I
IL
1.4
-10
0.5
+10
V
V
μA
V
IN
= 0 to VDD33
USB251xB/xBi
ICLK Input Buffer
Low Input Level
High Input Level
Input Leakage
V
ILCK
V
IHCK
I
IL
0.9
-10
0.3
+10
V
V
μA
V
IN
= 0 to VDD33
O12, I/O12 &I/OSD12 Type Buffer
Low Output Level
High Output Level
Output Leakage
Hysteresis (‘SD’ pad only)
V
OL
V
OH
I
OL
V
HYSC
2.4
-10
250
0.4
+10
350
V
V
μA
mV
I
OL
= 12 mA @
VDD33 = 3.3 V
I
OH
= -12 mA @
VDD33 = 3.3 V
V
IN
= 0 to VDD33
(Note 9.1)
Table 9.2 Supply Current Unconfigured: Hi-Speed Host (I
CCINTHS
)
PART MIN TYP MAX UNITS COMMENTS
USB2512/12i/12A/12Ai 90 95 mA
USB2512B/12Bi 40 45
USB2513/13i 95 105
USB2513B/13Bi 40 45
USB2514/14i 95 105
USB2514B/14Bi 45 50
USB2517/17i 120 130
Table 9.1 DC Electrical Characteristics (continued)
PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS