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SMP100MC Datasheet(PDF) 5 Page - STMicroelectronics

No. de Pieza. SMP100MC
Descripción  TRISIL™ FOR TELECOM EQUIPMENT PROTECTION
Descarga  10 Pages
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Fabricante  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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SMP100MC Datasheet(HTML) 5 Page - STMicroelectronics

 
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APPLICATION NOTE
Figure 8: Variation of thermal impedance
junction to ambient versus pulse duration
(Printed
circuit
board
FR4,
SCu=35µm,
recommended pad layout)
Figure
9:
Relative
variation
of
junction
capacitance versus reverse voltage applied
(typical values)
In wireline applications, analog or digital, both central office and subscriber sides have to be protected.
This function is assumed by a combined series / parallel protection stage.
In such a stage, parallel function is assumed by one or several Trisil, and is used to protect against short
duration surge (lightning). During this kind of surges the Trisil limits the voltage across the device to be
protected at its break over value and then fires. The fuse assumes the series function, and is used to pro-
tect the module against long duration or very high current mains disturbances (50/60Hz). It acts by safe
circuits opening. Lightning surge and mains disturbance surges are defined by standards like GR1089,
FCC part 68, ITU-T K20.
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
1.E+03
tp(s)
Z/R
th(j-a)
th(j-a)
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1
10
100
1000
V (V)
R
C [V ] / C [V =2V]
RR
F =1MHz
V= 1V
Tj = 25°C
OSC
RMS
Line
Ring
relay
Line
Ex. Analog line card
Ex. ADSL line card or terminal
Fuse TCP 1.25A
T1
T2
SMP100MC-xxx
Fuse TCP 1.25A
Tip S
Gnd
SMP100MC-xxx
Ring S
SMP100MC-xxx
Fuse TCP 1.25A
Tip L
Gnd
Ring L
Typical circuit for subscriber side
Typical circuit for central office side


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