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High Speed Inter-Chip USB 2.0 Hub and Flash Media Controller
Datasheet
SMSC USB4640/USB4640i 57 Revision 1.0 (06-01-09)
DATASHEET
10.2 Operating Conditions
10.3 DC Electrical Characteristics
PARAMETER SYMBOL MIN MAX UNITS COMMENTS
Commercial
USB4640
Operating
Temperature
T
A
0 70 °C Ambient temperature in still air.
Industrial
USB4640i
Operating
Temperature
T
A
-40 85 °C Ambient temperature in still air.
3.3 V supply voltage VDD33 3.0 3.6 V A 3.3 V regulator with an output
tolerance of 1% must be used if
the output of the internal power
FET’s must support a 5%
tolerance.
3.3 V supply rise time t
RT
0400μs(Figure 10.1)
Voltage on
USB+ and USB- pins
-0.3 5.5 V If any 3.3 V supply voltage drops
below 3.0 V, then the MAX
becomes:
(3.3 V supply voltage) + 0.5
≤ 5.5
Voltage on any signal
pin
-0.3 VDD33 V
Voltage on XTAL1 -0.3 2.0 V
Voltage on XTAL2 -0.3 2.0 V
PARAMETER SYMBOL MIN TYP MAX UNITS COMMENTS
I, IPU, IPD Type Input Buffer
Low Input Level
High Input Level
Pull Down
Pull Up
V
ILI
V
IHI
PD
PU
2.0
72
58
0.8 V
V
μA
μA
TTL Levels
IS Type Input Buffer
Low Input Level
High Input Level
Hysteresis
V
ILI
V
IHI
V
HYSI
2.0
420
0.8 V
V
mV
TTL Levels