
Document Number: 38-08036 Rev. *E Page 16 of 33
DC Full Speed USB Specifications
The following table lists guaranteed maximum and minimum specifications for the voltage and temperature ranges when the IMO is
selected as system clock: 4.75V to 5.25V and 0°C <
T
A
< 70°C, or 3.15V to 3.5V and 0°C < T
A
< 70°C, respectively.
The following table lists guaranteed maximum and minimum specifications for the voltage and temperature ranges when an external
clock is selected as the system clock: 4.75V to 5.25V and –40°C <
T
A
< 85°C, or 3.15V to 3.5V and –40°C < T
A
< 85°C.
Typical parameters apply to 5V and 3.3V at 25°C and are for design guidance only.
V
H
Input Hysteresis – 60 – mV
I
IL
Input Leakage (Absolute Value) – 1 – nA Gross tested to 1 μA.
C
IN
Capacitive Load on Pins as Input – 3.5 10 pF Package and pin dependent. Temp =
25°C.
C
OUT
Capacitive Load on Pins as Output – 3.5 10 pF Package and pin dependent. Temp =
25°C.
Table 10. DC Full Speed (12 Mbps) USB Specifications
Parameter Description Min Typ Max Unit Notes
USB Interface
V
DI
Differential Input Sensitivity 0.2 – – V | (D+) – (D–) |
V
CM
Differential Input Common Mode Range 0.8 – 2.5 V
V
SE
Single Ended Receiver Threshold 0.8 – 2.0 V
C
IN
Transceiver Capacitance – – 20 pF
I
IO
High Z State Data Line Leakage –10 – 10 μA0V < V
IN
< 3.3V.
R
EXT
External USB Series Resistor 23 – 25 Ω In series with each USB pin.
V
UOH
Static Output High, Driven 2.8 – 3.6 V 15 kΩ ± 5% to ground. Internal pull up
enabled.
V
UOHI
Static Output High, Idle 2.7 – 3.6 V 15 kΩ ± 5% to ground. Internal pull up
enabled.
V
UOL
Static Output Low – – 0.3 V 15 kΩ ± 5% to ground. Internal pull up
enabled.
Z
O
USB Driver Output Impedance 28 – 44 Ω Including R
EXT
resistor.
V
CRS
D+/D– Crossover Voltage 1.3 – 2.0 V
Table 9. DC GPIO Specifications (continued)
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