EFM8UB1 Datasheet, PDF (24/59 Pages) Silicon Laboratories – The EFM8UB1 highlighted features are listed below

4.1.14 USB Transceiver
EFM8UB1 Data Sheet
Electrical Specifications
Table 4.14. USB Transceiver
Parameter
Symbol Test Condition
Transmitter
Output High Voltage
V_OH
V_DD ≥3.0V
Output Low Voltage
V_OL
V_DD ≥3.0V
Output Crossover Point
V_CRS
Output Impedance
Z_DRV
Driving High
Driving Low
Pull-up Resistance
R_PU
Full Speed (D+ Pull-up)
Low Speed (D- Pull-up)
Output Rise Time
T_R
Low Speed
Full Speed
Output Fall Time
T_F
Low Speed
Full Speed
Receiver
Differential Input
Sensitivity
V_DI
| (D+) - (D-) |
Differential Input Common Mode V_CM
Range
Input Leakage Current
I_L
Pullups Disabled
Refer to the USB Specification for timing diagrams and symbol definitions.
Min
Typ
Max
Unit
2.8
—
—
V
—
—
0.8
V
1.3
—
2.0
V
28
36
44
Ω
28
36
44
1.425
1.5
1.575
kΩ
75
—
300
ns
4
—
20
ns
75
—
300
ns
4
—
20
ns
0.2
—
—
V
0.8
—
2.5
V
—
<1.0
—
μA
4.2 Thermal Conditions
Table 4.15. Thermal Conditions
Parameter
Symbol
Test Condition
Min
Typ
Thermal Resistance
θ_JA QFN-20 Packages
QFN-28 Packages
─
60
─
26
QSOP-24 Packages
─
65
Note:
1. Thermal resistance assumes a multi-layer PCB with any exposed pad soldered to a PCB pad.
Max
Unit
─
°C/W
─
°C/W
─
°C/W
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