MC141555 Motorola, MC141555 Datasheet - Page 5

• Manufacturer Part Number: MC141555
• Description: USB Hub Controller CMOS
• Manufacturer: Motorola

MOTOROLA
Downstream
Upstream
FULL SPEED OPERATING HUB ELECTRICAL CHARACTERISTICS
LOW SPEED OPERATING HUB ELECTRICAL CHARACTERISTICS
End of
Cable
Symbol
Symbol
t LHESK
t LDHJ1
t LDHJ2
t LDHJ2
t LDHJ2
Port
t HDD1
t HDD2
t HESK
t LHDD
t HDJ1
t HDJ2
t SOP
t SOP
Vss
Vss
Hub Differential Data Delay
(with cable)
(without cable)
Hub Differential Driver Jitter (including cable)
To Next Transition
For Paired Transitions
Data Bit Width Distortion After SOP
Hub EOP Output Width Skew
Hub Differential Data Delay
Hub Differential Driver Jitter (including cable)
Downstream:
To Next Transition
For Paired Transitions
Upstream:
To Next Transition
For Paired Transitions
Data Bit Width Distortion After SOP
Hub EOP Output Width Skew
Figure 5. Downstream Hub Delay
Downstream
Hub Delay
t
HDD1
50% Point of
Initial Swing
Freescale Semiconductor, Inc.
Parameter
Parameter
For More Information On This Product,
Go to: www.freescale.com
Crossover
Point
Downstream
Figure 5, Figure 6
Figure 5, Figure 6
Upstream
Port
Conditions
Conditions
End of
Cable
—
—
—
—
—
—
Vss
Vss
Figure 6. Upstream Hub Delay
-300
Min
Min
-15
-45
-15
-45
-45
-60
—
—
—
-3
-1
-5
Downstream
t
HDD1
Hub Delay
Crossover
Point
, t
HDD2
Max
Max
300
300
70
40
15
45
15
45
45
45
3
1
3
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MC141555
Crossover
Point
5