Datasheet
High-Speed Inter-Chip (HSIC) USB 2.0 Hub and Flash Media Controller
Datasheet
SMSC USB4640/USB4640i 51 Revision 1.3 (03-13-13)
DATASHEET
Chapter 6 DC Parameters
6.1  Maximum Guaranteed Ratings
Notes:
 Stresses above the specified parameters could cause permanent damage to the device. This is a 
stress rating only. Therefore, functional operation of the device at any condition above those 
indicated in the operation sections of this specification are not implied.
 When powering this device from laboratory or system power supplies, it is important that the 
absolute maximum ratings 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, it is 
suggested that a clamp circuit be used.
PARAMETER SYMBOL MIN MAX UNITS COMMENTS
Storage 
Temperature
T
STOR
-55 150 °C
Lead 
Temperature
°C Refer to 
JEDEC Specification 
J-STD-020D [5].
1.2 V supply 
voltage
VDD12 -0.5 1.5 V
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










