USB 2.0 Hi-Speed 3-Port Hub Controller Optimized for Portable Applications
Datasheet
9.2
Operating Conditions**
VBAT Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +2.9 V to +5.5 V
VDDCOREREG Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply Rise Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ambient Operating Temperature in Still Air (T
A
). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Note 9.5
Note 9.6
+1.6 V to +2.0 V when VDDCOREREG is connected to an external +1.8V power supply,
+3.0 V to +3.6 V when VDDCOREREG is connected to VDD33.
The power supply rise time requirements vary dependent on the usage of the external
reset (RESET_N). If RESET_N is asserted at power-on, the power supply rise time must
be 10mS or less (t
RT(max)
= 10mS). If RESET_N is not used at power-on (tied high), the
power supply rise time must be 1mS or less (t
RT(max)
= 1mS). Higher voltage supplies must
always be at an equal or higher voltage than lower voltage supplies.
illustrates
the supply rise time requirements.
0
o
C to +70
o
C for commercial version, -40
o
C to +85
o
C for industrial version.
Note 9.7
**Proper operation of the device is guaranteed only within the ranges specified in this section.
Voltage
t
RT
3.3V/VBAT 100%
90%
Voltage
t
RT
3.3V 100%
90%
1.8V
90%
VBAT
VBAT
VDDCOREREG
100%
10%
VSS
VSS
10%
t
90%
t
10%
Single Supply Rise Time Model
Time
t
90%
t
10%
Dual Supply Rise Time Model
Time
Figure 9.1 Single/Dual Supply Rise Time Models
Revision 1.0 (06-17-13)
58
SMSC USB3813
DATASHEET
SMSC [ SMSC CORPORATION ]
