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Prelminary
2004.11.12
USB Specification Revision 1.1
Parameter
Input Levels
High (driven)
Low
Diffential Input Sensitivity
Differential Common Mode Range
Output Levels
High (driven)
Low
Output Signal Crossover Voltage
Terminations
Bus Pull-up Resistor on Upstream Port
Termination Voltage for Upstream Port
Pull-up
*1 : <Input Levels V
, V
>
IH
IL
The switching threshold voltage of the USB I/O buffer's single-end receiver is set within the range from
V
0.8 V to V
IL (Max)
IH (Min)
For V
and V
, the LSI has some hysteresis to reduce noise susceptibility.
IH
IL
*2 : <Input Levels V
, V
DI
CM
A differential receiver is used to receive USB differential data signals.
The differential receiver has a differential input sensitivity of 200 mV when the differential data input falls within
the range from 0.8 V to 2.5 V with respect to the local ground reference level.
The above voltage range is referred to as common-mode input voltage range.
*3 : <Output Levels V
, V
OL
The output driving performance levels of the driver are 0.3 V or less (to 3.6-V, 1.5 k
state (V
) and 2.8 V or more (to ground, 1.5 k load) in the high state (V
OL
Symbol
V
IH
V
IL
V
DI
V
CM
V
OH
V
OL
V
CRS
R
PU
V
TERM
2.0 V (TTL input standard) .
>
1.0
0.2
0.8
Common mode input voltage (V)
>
OH
Value
Min
Max
2.0
0.8
0.2
0.8
2.5
0.0
0.3
2.8
3.6
1.3
2.0
1.425
1.575
3.0
3.6
2.5
load) in the low
) .
OH
MB91401
Unit
Remarks
V
*1
V
*1
V
*2
V
*2
V
*3
V
*3
V
*4
k
1.5 k
5
V
*5
51
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