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LCDP1511DRL
DUAL LINE PROGRAMMABLE TRANSIENT VOLTAGE SUPPRESSOR FOR SLIC PROTECTION
LCDP1511DSeptember 1999 - Ed:2A
DUAL LINE PROGRAMMABLE TRANSIENT
VOLTAGE SUPPRESSOR FOR SLIC PROTECTION
Dual line programmable transient suppressor
Wide negative firing voltage range : VMGL = -80V
Low dynamic switching voltages : VFP and VDGL
Low gate triggering current : IGT = 5mA max
Peak pulse current : IPP = 15 A (10/1000 μs)
Holding current : IH > 150 mA
FEATURESThe LCDP1511D is a dual line protector which pro-
tects subscriber line interface circuits (SLIC)
against transient overvoltages.
Positive overvoltages are clamped with diodes to-
wards GND, while negative overvoltages are sup-
pressed by thyristors connected to GND. The
breakdown voltage of the thyristors is determined
by the voltage applied to the gate, generally -Vbat.
DESCRIPTIONApplication Specific Discretes
A.S.D.TM
FUNCTIONAL DIAGRAM1/6
THERMAL RESISTANCE
ABSOLUTE MAXIMUM RATINGS (Tamb = 25°C).
Note 1: Pulse waveform10 / 1000 μs tr = 10 μs tp = 1000 μs
5 / 310 μstr = 5 μs tp = 310 μs
2 / 10 μstr = 2 μs tp = 10 μs
Note 2 : Maximum current flowing through the 4 wires together.
ELECTRICAL CHARACTERISTICS (Tamb = 25°C)
LCDP1511D2/6
note 1 : see test circuit for VFP, RP is the protection resistor located on the line card
PARAMETERS RELATED TO THE DIODE LINE / GND (Tamb = 25°C)
PARAMETERS RELATED TO LINE / GND (Tamb = 25°C)note 2 : see functional holding current test circuit
note 3 : See test circuit for VDGL
The oscillations with a time duration lower than 50ns are not taken into account
PARAMETERS RELATED TO THE PROTECTION THYRISTOR (Tamb = 25°C)0.01 0.10 1.00 10.00 100.00 1000.00
ITSM(A)
Fig. 1: Surge peak current versus overload duration.-40 -20 0 20 40 60 80 100 1200.0
IH[Tj] / IH[Tj=25°C]
Fig. 2: Relative variation of holding current versus
junction temperature.
LCDP1511D3/6
TEST CIRCUIT FOR VFP AND VDGL PARAMETERS
FUNCTIONAL HOLDING CURRENT (IH) TEST CIRCUIT : GO-NO GO TEST
LCDP1511D4/6
APPLICATION CIRCUIT: PABX line protection
APPLICATION CIRCUIT: Line Card protection
LCDP1511D5/6
PACKAGE MECHANICAL DATASO8 (Plastic)
. consequences of
use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by
implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to
change without notice. This publication supersedes and replaces all information previously supplied.
STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written ap-
proval of STMicroelectronics.
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© 1999 STMicroelectronics - Printed in Italy - All rights reserved.
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LCDP1511D6/6
