Silicon Laboratories C8051F347 - Manual (Page 187)

Rev. 1.3 187
C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
Table 16.4. USB Transceiver Electrical Characteristics
V
DD
= 3.0 to 3.6 V, –40 to +85 °C unless otherwise specified
Parameters Symbol Conditions Min Typ Max Units
Transmitter
Output High Voltage V
OH
2.8 V
Output Low Voltage V
OL
0.8 V
Output Crossover Point V
CRS
1.3 2.0 V
Output Impedance Z
DRV
Driving High
Driving Low
38
38

Pull-up Resistance R
PU
Full Speed (D+ Pull-up)
Low Speed (D– Pull-up)
1.425 1.5 1.575 k

Output Rise Time T
R
Low Speed
Full Speed
75
4
300
20
ns
Output Fall Time T
F
Low Speed
Full Speed
75
4
300
20
ns
Receiver
Differential Input
Sensitivity
V
DI
| (D+) – (D–) | 0.2 V
Differential Input Common
Mode Range
V
CM
0.8 2.5 V
Input Leakage Current I
L
Pullups Disabled <1.0 µA
Note: Refer to the USB Specification for timing diagrams and symbol definitions.