l3000n STLC3040 third generation subscriber line interface product preview two chip set + overvoltage protec- tion provide the complete borscht functions. programmable dc feeding resis- tance and current limiting 0 to 70ma (1.1ma steps). programmable voltage drop ac- cording to ttx/on hook transmis- sion needs. integrated ring generator with zero crossing and programmable freq/level. support normal loop start lines, ground start pabx lines, extended loops and pay-phones. generation, shaping and filtering of 12khz/16khz programmable levels teletax metering signals. reverse polarity hard or soft switching. signalling functions hook, gdkey with programmable persistance check. on hook transmission capability. ccitt and lssgr codec/filter std. a/ m law. 2 wire impedance synthesis soft- ware programmable. hybrid function software pro- grammable. programmable gain control and frequency response correction. supervision and test of line condi- tions, leakage, capacitance and cir- cuit signalling test for ttx and ringing. test tone generation for circuit test, loopbacks possibility. gci compatible control interface. selectable 2/4mhz backplane clock. minimum external components count. advanced 12v bjt-5v cmos 0.8 m mtech- nology guarantees reliability and low power consumption (50mw to- tal in on-hook condition). integrated thermal protection with thermal overload indication. description the subscriber line interface kit (l3000n/STLC3040) is a set of solid state de- vices designed to integrate all the classical borscht functions (overvoltage protection ex- ternal) and several additional features needed to interface a telephone line. the l3000n device is fabricated in b140ii (140v bipolar) technology and is basically an analog front end that drives the line via two output buffers properly amplifying signal applied at its input by the STLC3040. at the same time it provides back to the STLC3040 an accurate image of the loop current. the STLC3040 device is fabricated in bicmos (12v bipolar / 5v cmos) technology. this device interfaces the l3000n via a dedicated interface and the c.o. backplane via a gci compatible interface. the STLC3040 processes the line current image provided by the l3000n generating the transmit signal and the proper voltage signal that will be sent back to the l3000n in order to synthetize the desired ac/dc impedances on the 2-wire side. at the same time also the received signal on the digital side is transferred into the line. this is advanced information on a new product now in development or undergoing evaluation. details are subject to change withou t notice. january 1995 plcc44 ordering number: STLC3040 powerso-20 ordering number: l3000nso 1/8
the signal processing inside the STLC3040 is both analog and digital merging the best available analog and digital processing performances of the bicmos technology. the l3000n/STLC3040 kit is fully programmable and needs only 5 ext. resistors (including the two protection resistors) and 3 capacitors. these components are always the same; all the parame- ters related to different applications are software programmed. considering the dc characteristic, by proper programming it is possible to select several limiting currents (from 0 to 70ma with 1.1ma steps, different dc feeding resistance (from 0 to 2 x 400 w with 100 w steps) and differ- ent drop voltages (on-hook transmission, meter- ing pulse injection). considering ac performances all possible 2-wire impedances are software programmable, the same for the two to four wire conversion, where all the possible balance impedances can be soft- ware programmed. both tx and rx gain are pro- grammable (12 db range, 0.1db step) with proper frequency equalization that will guarantee a com- plete flat response in the speech band. ringing signal is also generated on chip with pro- grammable frequency and amplitude. for this purpose the l3000n device in addition to the negative battery (vb-) requires also a positive one (vb+). vb- can vary between -70v to -24v depending on the application. the vb+ is usually selected in order to have a total battery voltage |vb+|+|vb-| = 120v. ring injection and disconnection is always per- formed in correspondance of zero crossing. in ad- dition when ring trip is detected the ring signal is automatically disconnected again at the first zero crossing. the kit is also able to generate metering pulse signals (12 or 16khz) with programmable amplitudes up to 5vrms. polarity reversal is sup- ported. finally several testing features are provided by the kit. this means that the kit is able both to test itself and also the line parameters (leakage, ca- pacitance ..) saving the testing relays and the equipment needed to perform the test. pin connections (top views) 1 2 3 5 64 7 8 9 10 12 11 13 14 15 16 17 39 38 37 36 34 35 33 32 31 30 29 40 41 42 44 43 23 22 21 19 18 20 28 27 26 24 25 dgnd v cc fsc dd du dcl sel24 ts2 ts1 str3 ts0 io1 io2 c1 c2 vl2 vl1 sir0 cap il rac stro o1 i1 sir2 mr v dd idh v ss idm idl sir1 ext ref rdc cac it str1 acdc pdo agnd vout str2 vbim d94tl161 plcc44 v b- v bim v in v dd bgnd mnt v b+ tip n.c. ring n.c. il c2 it c1 ref agnd v b- 10 8 9 7 6 5 4 3 2 13 14 15 16 17 19 18 20 12 1 11 v b- v b- d94tl125 powerso-20 l3000n - STLC3040 2/8
operating range (refer to the test circuit, unless otherwise specified.) symbol parameter test condition min. typ. max. unit t oper operating temperature range 0 70 c v b- negative battery voltage -70 -48 -24 v v b+ positive battery voltage 0 72 75 v |v b- |+|v b+ | total battery voltage 120 130 v v dd positive supply voltage +4.5 +5.5 v v ss negative supply voltage -5.5 -4.5 v i max total line current (il+it) 85 ma absolute maximum ratings symbol parameter value unit v b- negative battery voltage -80 v v b+ positive battery voltage +80 v |v b- |+|v b+ | total battery voltage 140 v v dd positive supply voltage +5.5 v v ss negative supply voltage -5.5 v |vagnd-vbgnd| maximum voltage between agnd/bgnd 5 v t j maximum junction temperature 150 c t stg storage temperature -55 to +150 c thermal data symbol parameter value unit l3000n r th j-case thermal resistance junction to case typ. 2 c/w r th j-amb thermal resistance junction to ambient max. 60 c/w STLC3040 r th j-amb thermal resistance junction to ambient max. 80 c/w l3000n - STLC3040 3/8
pin description (l3000n) powerso-20 n name description 3 tip a line termination output with current capability up to 100ma (i a is the current sourced from this pin). 4 mnt positive supply voltage monitor. 5v b+ positive battery supply voltage. 6 bgnd battery ground relative to the v b+ and the v b- supply voltages. it is also the reference ground for tip and ring signals. 7v dd positive power supply +5v. 8v in 2 wire unbalanced voltage input. 9 vbim output voltage without current capability, with the following functions: - give an image of the total battery voltage scaled by 40 to the low voltage part. - filter by an external capacitor the noise on v b+ and v b- . 1,10,11,20 v b- negative battery supply voltage. 12 agnd analog ground. all input signals and the v dd supply voltage must be referred to this pin. 13 ref voltage reference output with very low temperature coefficient. the connected resistor sets internal circuit bias current. 14 c1 digital signal input (3 levels) that defines device status with pin 12. in thermal overload condition a 240ma typical current is sunk by this pin. 15 c2 digital signal input (3 levels) that defines device status with pin 11. 16 i t high precision scaled transversal line current signal. 17 i l scaled longitudinal line current signal. 19 ring b line termination output with current capability up to 100ma (i b is the current sunk into this pin). 2, 18 n.c. not connected. notes : 1) all information relative to the powerso-20 package option should be cons idered as advanced information on a new product now in developement or undergoing evaluation. details are subject to change without notice. i l = i a C i b 100 i t = i a + i b 100 l3000n - STLC3040 4/8
pin description (STLC3040) plcc44 n o symbol type description 1 dgnd id digital ground. 2v cc id +5v digital supply. 3 fsc id frame sinc. 8khz gci interface. 4 dcl id master data clock gci interface. 5 dd id data down link gci interface 6 du od data up link gci interface 7,8 io1,io2 i/od programmable i/o gci controlled 9 c1 od state control signal 1. combination of c1 and c2 define l3000n operating mode. 10 c2 od state control signal 2. 11,12 vl1,vl2 ia comparator inputs. these are inputs of the comparator that senses the line voltage in loop open mode allowing off/hook detection in this mode. 13 sir0 i/od dedicated, leave open. 14 cap i/oa reversal. proper capacitor should be connected to this pin when soft battery reversal is needed. 15 il ia longitudinal line current input 16 rac i/oa ac synthesis reference resistor. 17,18 str0,str1 i/od dedicated, leave open. 19 it ia transversal line current input 20 acdc i/oa ac/dc line split. scaled line current output, dc feedback input. 21 cac i/oa split capacitor. ac scaled line current input. 22 rdc i/oa dc synthesis reference resistor. 23 ref i/oa reference voltage output. a resistor connected to this pin is setting the internal reference current. 24 str2 i/od dedicated, leave open 25 vbim ia battery image monitor. 26 vout oa two wire unbalanced output feeding the line voltage signals (dc, ac, ring, ttx) scaled by 40. 27 agnd ia analog ground. 28 pdo oa power down output. proper bias current is provided to l3000n by this pin. when the current is 0 the l3000n goes in power down (high impedance). 29 ext id external ring sync. input. 30 sir1 i/od dedicated, leave open. 31,32 idl,idm ia line-card identification, least valued bit. 33 v s ia -5v analog supply. 34 v dd ia +5v analog supply. 35 idh ia line-card id, serial id signature input. 36 mr id master reset input. when connected to vcc the STLC3040 is forced in power down, all internal registers resetted. 37 sir2 i/od dedicated, leave open. 38 i1 id digital input read via gci 39 o1 od digital output written via gci. 40 sel24 id select clock f requency for gci interface 2mhz/4mhz, not affecting the data rate. 41,42,43 ts2,ts1,ts0 id gci select time slot identifier pins. 44 str3 i/od dedicated, leave open. i l = i a C i b 100 i t = i a + i b 100 l3000n - STLC3040 5/8
plcc44 package mechanical data dim. mm inch min. typ. max. min. typ. max. a 17.4 17.65 0.685 0.695 b 16.51 16.65 0.650 0.656 c 3.65 3.7 0.144 0.146 d 4.2 4.57 0.165 0.180 d1 2.59 2.74 0.102 0.108 d2 0.68 0.027 e 14.99 16 0.590 0.630 e 1.27 0.050 e3 12.7 0.500 f 0.46 0.018 f1 0.71 0.028 g 0.101 0.004 m 1.16 0.046 m1 1.14 0.045 l3000n - STLC3040 6/8
e a2 a e a1 pso20mec detail a t d 110 11 20 e1 e2 h x 45? detail a lead slug a3 s gage plane 0.35 l detail b r detail b (coplanarity) gc - c - seating plane e3 b c n n powerso-20 package mechanical data dim. mm inch min. typ. max. min. typ. max. a 3.60 0.1417 a1 0.10 0.30 0.0039 0.0118 a2 3.30 0.1299 a3 0 0.10 0 0.0039 b 0.40 0.53 0.0157 0.0209 c 0.23 0.32 0.009 0.0126 d (1) 15.80 16.00 0.6220 0.6299 e 13.90 14.50 0.5472 0.570 e 1.27 0.050 e3 11.43 0.450 e1 (1) 10.90 11.10 0.4291 0.437 e2 2.90 0.1141 g 0 0.10 0 0.0039 h 1.10 0.0433 l 0.80 1.10 0.0314 0.0433 n10 (max.) s8 (max.) t 10.0 0.3937 (1) "d and e1" do not include mold flash or protrusions - mold flash or protrusions shall not exceed 0.15mm (0.006") l3000n - STLC3040 7/8
information furnished is believed to be accurate and reliable. however, sgs-thomson microelectronics assumes no responsibility for the 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 sgs-thomson microelectronics. specifications men- tioned in this publi cation are subject to change without not ice. this publication sup ersedes and replaces all information previously supplied. sgs-thomson microelectronics products are not authorized for use as critical components in life support dev ices or systems without ex- press written approval of sgs-thomson microelectronics. ? 1995 sgs-thomson microelectronics - all rights reserved sgs-thomson microelectronics group of companies aust ralia - brazil - france - germany - hong kong - italy - japan - korea - malaysia - malta - morocco - the netherlands - singapore - spain - sweden - switzerland - taiwan - thaliand - united k ingdom - u.s.a. l3000n - STLC3040 8/8
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