uClamp3311T
ypical Characteristics
Typical Insertion Loss (S21)
LOG
6 dB / REF 0 dB
1: -2.3215 dB
800 MHz
CH1 S21
0 dB
12
2: -2.5192 dB
900 MHz
3
4
5
-6 dB
-12 dB
-18 dB
-24 dB
-30 dB
-36 dB
3: -3.0194 dB
981.928 MHz
4: -5.6822 dB
1.8 GHz
5: -12.905 dB
2.5 GHz
1
MHz
START . 030 MHz
10
MHz
100
MHz
3
1
GHz GHz
STOP 3000. 000000 MHz
Device Connection Options
Device Schematic & Pin Configuration
The µClamp3311T is designed to protect one data line
operating up to 3.3 volts. It will present a high
impedance to the protected line up to 3.3 volts. It will
“turn on” when the line voltage exceeds 3.5 volts. The
device is bidirectional and may be used on lines where
the signal polarity is above and below ground. These
devices are not recommended for use on dc power
supply lines due to their snap-back voltage
characteristic.
2
1
Circuit Board Layout Recommendations for Suppres-
sion of ESD.
Good circuit board layout is critical for the suppression
of ESD induced transients. The following guidelines are
recommended:
l
Place the TVS near the input terminals or connec-
tors to restrict transient coupling.
l
Minimize the path length between the TVS and the
protected line.
l
Minimize all conductive loops including power and
ground loops.
l
The ESD transient return path to ground should be
kept as short as possible.
l
Never run critical signals near board edges.
l
Use ground planes whenever possible.
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2015 Semtech Corporation
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