© 2004 Fairchild Semiconductor Corporation

www.fairchildsemi.com

USB1T20 • Rev. 1.0.2

6

AC Electrical Characteristics D+/D- Pins, Full Speed

Over the recommended range of supply voltage and operating free air temperature unless otherwise noted.

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

Driver Characteristics

Rise and Fall Time

10 and 90%, Figure 3

4

20

ns

Rise/Fall Time Matching

90

110

%

Output Signal Crossover Voltage

1.3

2.0

V

Driver Timings

Driver Propagation Delay

Figure 4

18

ns

Driver Disable Delay (/OE to D+/D-)

Figure 6

13

ns

Driver Enable Delay (/OE to D+/D-)

Figure 6

17

ns

Receiver Timings

16

ns

Receiver Propagation Delay

D+/D- to RVC

Figure 5

19

ns

Single-ended Receiver Delay

Figure 5

8

ns

AC Electrical Characteristics D+/D- Pins, Low Speed

Over the recommended range of supply voltage and operating free air temperature unless otherwise noted.

Symbol

Parameter

Conditions

Min.

Typ.

Max.

Units

Driver Characteristics

Rise and Fall Time

10 and 90%, Figure 3

75

300

ns

Rise/Fall Time Matching

80

120

%

Output Signal Crossover Voltage

1.3

2.0

V

Driver Timings

Driver Propagation Delay

Figure 4

300

ns

Driver Disable Delay (/OE to D+/D-)

Figure 6

13

ns

Driver Enable Delay (/OE to D+/D-)

Figure 6

205

ns

Receiver Timings

Receiver Propagation Delay

(D+/D- to RVC)

Figure 5

18

ns

Single-ended Receiver Delay

Figure 5

28

ns