lcdp1511d ? september 1999 - ed:2a dual line programmable transient voltage suppressor for slic protection so8 dual line programmable transient suppressor wide negative firing voltage range : v mgl = -80v low dynamic switching voltages : v fp and v dgl low gate triggering current : i gt = 5ma max peak pulse current : i pp = 15 a (10/1000 m s) holding current : i h > 150 ma features the 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 -v bat . description application specific discretes a.s.d. tm complies with the following standards: peak surge voltage (v) voltage waveform ( m s) current waveform ( m s) admissible ipp (a) necessary resistor ( w ) itu-t k20 1000 10/700 5/310 25 - vde0433 2000 10/700 5/310 25 40 vde0878 1500 1.2/50 1/20 40 - iec1000-4-5 level 2 level 2 10/700 1.2/50 5/310 8/20 25 25 - - fcc part 68 1500 800 10/160 10/560 10/160 10/560 30 20 - 5 bellcore nwt-001089-core 2500 1000 2/10 10/1000 2/10 10/1000 70 15 25 45 tip 1 ring 1 8 1 tip 2 ring 2 5 4 gate gate 2 3 gnd gnd 7 6 functional diagram 1/6
symbol parameter value unit rth (j-a) junction to ambient 170 c/w thermal resistance symbol parameter value unit i pp peak pulse current (see note1) 10/1000 m s 5/310 m s 2/10 m s 15 25 70 a i fsm non repetitive surge peak on-state current (see note2) t p = 10ms t p = 1s 5 3.5 a v mlg v mgl maximum voltage line/gnd maximum voltage gate/line 80 80 v t stg storage temperature range - 55 to + 150 c t l lead temperature for soldering during 10s 260 c absolute maximum ratings (t amb = 25c). 100 50 %i pp t t t r p 0 note 1: pulse waveform 10 / 1000 m s tr = 10 m s tp = 1000 m s 5 / 310 m str = 5 m s tp = 310 m s 2 / 10 m str = 2 m s tp = 10 m s note 2 : maximum current flowing through the 4 wires together. symbol parameter i gt gate triggering current i h holding current i rm reverse leakage current line / gnd i rg reverse leakage current gate / line v rm reverse voltage line / gnd v gt gate triggering voltage v f forward drop voltage line / gnd v fp peak forward voltage v dgl dynamic switching voltage gate / line v gate gate / gnd voltage v rg reverse voltage gate / line c capacitance line / gnd electrical characteristics (t amb = 25c) v dgl v rm v r i pp i h i r i rm v f lcdp1511d 2/6
symbol test conditions max unit v f square pulse : t p = 500 m s i f = 1a 2v v fp (note 1) 10/700 m s 1.2/50 m s 2/10 m s 1kv 1.5kv 2.5kv r p = 60 w r p = 60 w r p = 245 w i pp = 10a i pp = 15a i pp = 10a 5 10 20 v note 1 : see test circuit for v fp , r p is the protection resistor located on the line card parameters related to the diode line / gnd (t amb = 25c) symbol test conditions max unit i rm v gate / line = -1v v rm = -75v 5 m a c v r = -3v f = 1mhz v r = -48v f = 1mhz 200 100 pf parameters related to line / gnd (t amb = 25c) symbol test conditions min max unit i gt v gnd / line = -48v 5ma i h v gate = -48v (see note 2) 150 ma v gt at i gt 2.5 v i rg v rg = -75v 5 m a v dgl v gate = -48v (see note 3) 10/700 m s 1.2/50 m s 2/10 m s 1kv 1.5kv 2.5kv r p = 60 w r p = 60 w r p =245 w i pp = 10a i pp = 15a i pp = 10a 7 15 20 v note 2 : see functional holding current test circuit note 3 : see test circuit for v dgl the oscillations with a time duration lower than 50ns are not taken into account parameters related to the protection thyristor (t amb = 25c) 0.01 0.10 1.00 10.00 100.00 1000.00 0 1 2 3 4 5 6 7 t(s) itsm(a) f=50hz tj initial=25c fig. 1: surge peak current versus overload duration. -40 -20 0 20 40 60 80 100 120 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 tj(c) ih[tj] / ih[tj=25c] fig. 2: relative variation of holding current versus junction temperature. lcdp1511d 3/6
pulse ( m s) v p c 1 c 2 lr 1 r 2 r 3 r 4 i pp r p t r t p (v) ( m f) (nf) ( m h) ( w )( w )( w )( w )(a)( w ) 10 700 1000 20 200 0 50 15 25 25 10 60 1.2 50 1500 1 33 0 76 13 25 25 15 60 2 10 2500 10 0 1.1 1.3 0 3 3 10 245 test circuit for v fp and v dgl parameters this is a go-no go test which allows to confirm the holding current (i h ) level in a functional test circuit. test procedure : - adjust the current level at the i h value by short circuiting the d.u.t. - fire the d.u.t. with a surge current : i pp = 15a, 10/1000 m s. - the d.u.t. will come back to the off-state within a duration of 50ms max. cc r r tip ring gnd v p 4 3 2 r 2 r 1 (v is defined in unload condition) p l 1 r -v p v bat - 48 v = surge generator d.u.t. functional holding current (i h ) test circuit : go-no go test lcdp1511d 4/6
application circuit: pabx line protection application circuit: line card protection lcdp1511d slic -vbat slic -vbat ptc or fuse ptc or fuse r p r p line 1 clp30-200b1 ptc or fuse ptc or fuse r p r p line 2 clp30-200b1 ring relay 1 ring relay 2 lcdp1511d slic -vbat slic -vbat ptc or fuse ptc or fuse r p p r r r r r r p p p line 1 ring relay ring relay 1 protection ptc or fuse ptc or fuse line 2 ring relay protection ring relay 2 lcdp1511d 5/6
package mechanical data so8 (plastic) information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsib ility for the cons equences 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 expres s written ap- proval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics ? 1999 stmicroelectronics - printed in italy - all rights reserved. stmicroelectronics group of companies australia - brazil - china - finland - france - germany - hong kong - india - italy - japan - malaysia malta - morocco - singapore - spain - sweden - switzerland - united kingdom - u.s.a. http://www.st.com ref. dimensions millimetres inches min. typ. max. min. typ. max. a 1.75 0.069 a1 0.1 0.25 0.004 0.010 a2 1.65 0.065 a3 0.65 0.85 0.025 0.033 b 0.35 0.48 0.014 0.019 b1 0.19 0.25 0.007 0.010 c 0.25 0.50 0.50 0.010 0.020 c1 45 (typ) d 4.8 5.0 0.189 0.197 e 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 f 3.8 4.0 0.15 0.157 l 0.4 1.27 0.016 0.050 m 0.6 0.024 s8 (max) l e d 8 4 5 1 m s c1 e b e3 a c a 1 b a3 1 a2 f ordre code marking package weight base qty delivery mode lcdp1511d lcdp15 so8 0.077 g 100 tube LCDP1511DRL lcdp15 so8 0.077 g 2500 tape & reel lcdp1511d 6/6
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