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High Speed Inter-Chip USB 2.0 Hub and Flash Media Controller
Datasheet
Revision 1.0 (06-01-09) 56 SMSC USB4640/USB4640i
DATASHEET
Chapter 10 DC Parameters
10.1 Maximum Guaranteed Ratings
Note: Stresses above the specified parameters may cause permanent damage to the device. This is
a stress rating only. Functional operation of the device at any condition above those indicated
in the operation sections of this specification is not implied. When powering this device from
laboratory or system power supplies the absolute maximum ratings must not be exceeded or
device failure can result. Some power supplies exhibit voltage spikes on their outputs when the
AC power is switched on or off. In addition, voltage transients on the AC power line may appear
on the DC output. When this possibility exists, a clamp circuit should be used.
Figure 10.1 Supply Rise Time Model
PARAMETER SYMBOL MIN MAX UNITS COMMENTS
Storage
Temperature
T
STOR
-55 150 °C
Lead
Temperature
°C Please refer to JEDEC
specification J-STD-020D.
3.3 V supply
voltage
VDD33 -0.5 4.0 V
Voltage on
USB+ and
USB- pins
-0.5 (3.3 V supply voltage + 2)
≤ 6V
Voltage on
GPIO10
-0.5 VDD33 + 0.3 V When internal power FET
operation of these pins are
enabled, these pins may be
simultaneously shorted to
ground or any voltage up to
3.63 V indefinitely, without
damage to the device as
long as VDD33 is less than
3.63 V and T
A
is less than
70
o
C.
Voltage on
any signal pin
-0.5 VDD33 + 0.3 V
Voltage on
XTAL1
-0.5 3.6 V
Voltage on
XTAL2
-0.5 2.0 V
t
10%
10%
90%
Voltage
t
RT
t
90%
Time
100%
3.3 V
VSS
VDD33