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PDF SMP100MC-270 Data sheet ( Hoja de datos )

Número de pieza SMP100MC-270
Descripción TRISIL FOR TELECOM EQUIPMENT PROTECTION
Fabricantes STMicroelectronics 
Logotipo STMicroelectronics Logotipo



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® SMP100MC
TRISIL™ FOR TELECOM EQUIPMENT PROTECTION
FEATURES
Bidirectional crowbar protection
Voltage: range from 120V to 270V
Low VBO / VR ratio
Micro capacitance from 20pF to 30pF @ 50V
Low leakage current : IR = 2µA max
Holding current: IH = 150 mA min
Repetitive peak pulse current :
IPP = 100 A (10/1000µs)
MAIN APPLICATIONS
Any sensitive equipment requiring protection
against lightning strikes and power crossing.
These devices are dedicated to central office pro-
tection as they comply with the most stressfull
standards.
Their Micro Capacitance make them suitable for
ADSL2+ and low end VDSL.
DESCRIPTION
The SMP100MC is a series of micro capacitance
transient surge arrestors designed for the protec-
tion of high debit rate communication equipment.
Its micro capacitance avoids any distortion of the
signal and is compatible with digital transmission
line cards (ADSL, VDSL, ISDN...).
Compatible with Cooper Bussmann fuse:
TCP 1.25A.
BENEFITS
Trisils are not subject to ageing and provide a fail
safe mode in short circuit for a better protection.
They are used to help equipment to meet main
standards such as UL60950, IEC950 / CSA C22.2
and UL1459. They have UL94 V0 approved resin.
SMB package is JEDEC registered (DO-214AA).
Trisils comply with the following standards GR-
1089 Core, ITU-T-K20/K21, VDE0433, VDE0878,
IEC61000-4-5 and FCC part 68.
SMB
(JEDEC DO-214AA)
Table 1: Order Codes
Part Number
SMP100MC-120
SMP100MC-140
SMP100MC-160
SMP100MC-200
SMP100MC-230
SMP100MC-270
Marking
ML12
ML14
ML16
ML20
ML23
ML27
Figure 1: Schematic Diagram
December 2004
REV. 1
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SMP100MC-270 pdf
SMP100MC
Figure 8: Variation of thermal impedance
junction to ambient versus pulse duration
(Printed circuit board FR4, SCu=35µm,
recommended pad layout)
Zth(j-a)/Rth(j-a)
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1.E-02
1.E-01
tp(s)
1.E+00
1.E+01
1.E+02
1.E+03
Figure 9: Relative variation of junction
capacitance versus reverse voltage applied
(typical values)
C [VR] / C [VR=2V]
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
1
10
VR(V)
100
F =1MHz
VOSC = 1VRMS
Tj = 25°C
1000
APPLICATION NOTE
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.
Ring
relay
Line
Line
Ex. Analog line card
Ex. ADSL line card or terminal
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.
Fuse TCP 1.25A
Fuse TCP 1.25A
Tip L
T1
SMP100MC-xxx
Gnd
T2
Fuse TCP 1.25A
Ring L
Tip S
SMP100MC-xxx
Gnd
SMP100MC-xxx
Ring S
Typical circuit for subscriber side
Typical circuit for central office side
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