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8.0 Device Characteristics
Symbol
V
Input Low Voltage
IL
I
Input Low Current
IL
I
Input High Current
IH
I
Tri-state Leakage
OZ
Oscillator Input/Output Signals (XTALIN, XTALOUT)
V
Input High Switching Level
IH
V
Input Low Switching Level
IL
C
Input Capacitance
XIN
C
Output Capacitance
XOUT
Voltage Regulator (3.3V)
V
Output Voltage
O
1. If the internal voltage regulator is enabled, the minimum voltage is 4.25V instead of 3.0V.
2. CLKOUT is not driven and the device is not accessed.
3. The internal votlage regulator is disabled.
4. These voltage levels apply only when an external clock is connected to XTALIN.
5. Much lower voltage levels are expected when the internal oscillator is used.
6. Not tested. Guaranteed by design.
7. The internal voltage regulator is intended to power only the internal transceivers and one external pull-up.
An external de-coupling capacitor is connected to this pin.
8.3 AC ELECTRICAL CHARACTERISTICS
(3.0V< V
< 5.5V, 0˚C < TA< +70˚C, unless otherwise specified)
CC
Symbol
Full Speed Signaling (D+, D-)
T
Rise Time
R
T
Fall Time
F
T
Rise / Fall Time Matching (T
RFM
V
Output Signal Crossover Voltage
CRS
Z
Driver Output Impedance (Single Ended)
DRV
Clock Out Characteristics (CLKOUT)
T
Output Rise Time
R
T
Output Fall Time
F
T
Output Duty Cycle
CYCLE
1. Testing is centered around 50 Ω, not 45 Ω +/-15% as specified in USB spec. rev 1.1.
2. Waveforms are measured from 10% to 90%.
(Continued)
Parameter
V
= GND
IN
V
= V
IN
V
OUT
4, 5
4, 5
6
7
Parameter
/T
)
R
F
Conditions
CC
= V
or GND
CC
1 2
Conditions
C
= 50pF
L
C
= 50pF
L
C
= 50pF
L
C
= 50pF
L
C
= 50pF
L
C
= 50pF
L
C
= 50pF
L
Fout<48MHz
53
Min
Typ
Max
Units
0.8
-10
10
-10
10
1.8
1.0
4.0
4.0
3.0
3.6
Min
Typ
Max
Units
4
20
4
20
90
110
1.3
2.0
35
10
10
45
55
www.national.com
V
µA
µA
µA
V
V
pF
pF
V
nS
nS
%
V
Ω
nS
nS
%
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