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S3C2410A ELECTRICAL DATA
24-37
Table 24-17. USB Full Speed Output Buffer Electrical Characteristics
(V
DD
= 1.8V ± 0.15 / 2.0 V ± 0.1 V, T
A
= -40 to 85 °C, V
EXT
= 3.3V ± 0.3V)
Parameter Symbol Condition Min Max Unit
Driver Characteristics
Transition Time
Rise Time
Fall Time
TR
TF
CL = 50pF
CL = 50pF
4.0
4.0
2.0
2.0
ns
Rise/Fall Time Matching TRFM (TR / TF ) 90 110 %
Output Signal Crossover
Voltage
VCRS 1.3 2.0 V
Drive Output Resistance ZDRV Steady state drive 28 43 ohm
Table 24-18. USB Low Speed Output Buffer Electrical Characteristics
(V
DD
= 1.8V ± 0.15 / 2.0 V ± 0.1 V, T
A
= -40 to 85 °C, V
EXT
= 3.3V ± 0.3V)
Parameter Symbol Condition Min Max Unit
Driver Characteristics
Transition Time
Rising Time
Falling Time
TR
TF
CL = 50pF
CL = 350pF
CL = 50pF
CL = 350pF
75
75
300
300
ns
Rise/Fall Time Matching TRFM (TR / TF ) 80 120 %
Output Signal Crossover
Voltage
VCRS 1.3 2.0 V