Datasheet

USB 2.0 Hi-Speed Hub Controller
Datasheet
Revision 2.2 (02-17-12) 16 SMSC USB251xB/xBi
DATASHEET
VBUS_DET Upstream VBUS
Power Detection
27
VDD33 3.3 V Power 5
VDD33 10
VDD33 15
VDD33 23
VDD33 29
VDD33 36
XTALIN Crystal Input 33
XTALOUT Crystal Output 32
Table 3.2 USB251xB/xBi Pin List (Alphabetical)
SYMBOL NAME
PIN NUMBERS
36 QFN
USB2512B USB2512Bi USB2513B USB2513Bi USB2514B USB2514Bi
BC_EN1 Battery Charging
Strap Option
12
BC_EN2 16
BC_EN3 -18
BC_EN4 -20
CFG_SEL0 Configuration
Programming
Selection
24
CFG_SEL1 25
CLKIN External Clock Input 33
CRFILT Core Regulator
Filter Capacitor
14
Ground Pad
(VSS)
Exposed Pad Tied
to Ground (VSS)
ePad
HS_IND Hi-Speed Upstream
Port Indicator
25
LOCAL_PWR Local Power
Detection
28
Table 3.1 USB251xB/xBi Pin List (Alphabetical) (continued)
SYMBOL NAME
PIN NUMBERS
36 QFN
USB2512B USB2512Bi USB2513B USB2513Bi USB2514B USB2514Bi