Download Fujitsu MB91401 User's Manual

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