4 2012 Semtech Corporation
www.semtech.com
PRELIMINARY
PROTECTION PRODUCTS
RClamp0521P
Typical Characteristics
ESD Clamping (+8kV Contact per IEC 61000-4-2)
ESD Clamping (-8kV Contact per IEC 61000-4-2)
Applications Information
Device Connection Options
These low capacitance TVS diodes are designed to
provide common mode protection for one high-speed
line or differential protection for one line pair. The
device is bidirectional and may be used on lines where
the signal polarity is positive and negative.
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.
Equivalent Circuit Diagram
0
50
100
150
200
250
300
350
-10 0 10 20 30 40 50 60
Voltage (V)
Time (ns)
T
A
= 25
O
C
Corrected for 40dB attenuation
Measured with 50 Ohm, 40dB
attenuator
50 Ohm Scope input impedance
RClamp0521P D02181 ESD +8kV
-350
-300
-250
-200
-150
-100
-50
0
-10 0 10 20 30 40 50 60
Voltage (V)
Time (ns)
T
A
= 25
o
C
Corrected for 40dB attenuation
Measured with 50Ω, 40dB attenuator
50Ω Scope input impedance
RClamp0521P D02181 ESD -8kV
