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MB91401
51
USB Specification Revision 1.1
*1 : <Input Levels V
IH, VIL>
The switching threshold voltage of the USB I/O buffer’s single-end receiver is set within the range from
V
IL (Max) = 0.8 V to VIH (Min) = 2.0 V (TTL input standard) .
For V
IH and VIL, the LSI has some hysteresis to reduce noise susceptibility.
*2 : <Input Levels V
DI, VCM>
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
OL, VOH>
The output driving performance levels of the driver are 0.3 V or less (to 3.6-V, 1.5 kΩ load) in the low
state (V
OL) and 2.8 V or more (to ground, 1.5 kΩ load) in the high state (VOH) .
Parameter Symbol
Value
Unit Remarks
Min Max
Input Levels
High (driven) V
IH 2.0 V*1
Low V
IL 0.8 V *1
Diffential Input Sensitivity VDI 0.2 V*2
Differential Common Mode Range V
CM 0.8 2.5 V *2
Output Levels
High (driven) V
OH 0.0 0.3 V *3
Low V
OL 2.8 3.6 V *3
Output Signal Crossover Voltage V
CRS 1.3 2.0 V *4
Terminations
Bus Pull-up Resistor on Upstream Port R
PU 1.425 1.575 kΩ 1.5 kΩ ± 5%
Termination Voltage for Upstream Port
Pull-up
V
TERM 3.0 3.6 V *5
0.8
0.2
1.0
2.5
Common mode input voltage (V)
Minimum operating input
sensitivity (V)
Prelminary
2004.11.12