USB 2.0 Hi-Speed Hub Controller
Datasheet
TJ = P x ΘJC + TC
Max Power Supported = (TJ Max. Spec. x TAmb.)/ ΘJA
SYMBOL
Table 6.11 Legend
DESCRIPTION
TJ
Junction temperature
P
Power dissipated
ΘJA
Junction-to-ambient-temperature
ΘJC
Junction-to-top-of-package
ΨJT
Junction-to-bottom-of-case
TA
Ambient temperature
TC
Temperature of the bottom of the case
TT
Temperature of the top of the case
SMSC USB251xB/xBi
55
DATASHEET
Revision 2.2 (02-17-12)