product brief october 2000 l9216a/g short-loop ringing slic with ground start introduction the l9216 is a subscriber line interface circuit (slic) that is optimized for short-loop, power sensitive appli- cations. this device provides the complete set of line interface functionality, including power ringing needed to interface to a subscriber loop. this device has the capability to operate with a v cc supply of 3.3 v or 5 v and is designed to minimize external components required at all device interfaces. features n onboard ringing generation n three ringing input options sinewave pwm logic level squarewave n flexible v cc options 5 v or 3.3 v v cc no C5 v required n battery switch to minimize off-hook power n 8 operating states scan mode for minimal power dissipation forward and reverse battery active on-hook transmission states ground start ring mode disconnect mode n ultralow on-hook power 27 mw scan mode 41 mw active mode n two slic gain options to minimal external compo- nents in codec interface n loop start, ring trip, and ground start detectors n software controllable dual current limit option n 28-pin plcc package applications n voice over internet protocol (voip) n cable modems n terminal adapters (ta) n wireless local loop (wll) n telcordia technologies * ta-909 access n network termination (nt) n key systems description this device is optimized to provide battery feed, ring- ing, and supervision on short-loop plain old tele- phone service (pots) loops. supported loop length is less than 250 w of wire. this device provides power ring to the subscriber loop through amplification of a low-voltage input. it provides forward and reverse battery feed states, on- hook transmission, a low-power scan state, ground start (tip open), and a forward disconnect state. the device requires a v cc and battery to operate. v cc may be either a 5 v or a 3.3 v supply. the ring- ing signal is derived from the high-voltage battery. a battery switch is included to allow for use of a lower- voltage battery in the off-hook mode, thus minimizing short-loop off-hook power. loop closure, ring trip, and ground start detectors are available. the loop closure detector has a fixed threshold with hysteresis. the ring trip detector requires a single-pole filter, thus minimizing external components required. the dc current limit is set and fixed by a logic control- lable pin. ground or vcc applied to this pin set the current limit at the high or low value. the device is offered with two gain options. this allows for an optimized codec interface, with minimal external components regardless of whether a first- generation or a programmable third-generation codec is used. * telcordia technologies is a registered trademark of bell commu- nications research, inc.
product brief october 2000 short-loop ringing slic with ground start l9216a/g lucent technologies inc. 2 architecture diagram 12-3530.e (f) figure 1. architecture diagram pin information 12-3558.d (f) figure 2. 28-pin plcc vref vitr txi itr vtx pt pr icm rgdet cf2 cf1 fb2 fb1 power agnd v cc bgnd v bat2 v bat1 v prog nstat rtflt dcout 1.5 v band-gap reference aac b = 20 out (itr/306) tip/ring current sense +1 itr itr rft 18 w rfr 18 w v reg C1 v reg ringing 27.5x parallel data interface ring in b0 b1 b2 x1 x1 rcvn rcvp current limit and inrush control ring loop rectifier vtx common- mode current detector trip closure v ref C + 9216a gain = 4 + C + C C + gain ax 9216g gain = 1 ac interface b0 b1 b2 pr pt fb1 dcout cf2 cf1 rtflt 5 6 7 8 9 10 11 4212827 3 12 14 15 16 17 18 13 25 24 23 22 21 20 19 nstat v bat2 agnd icm rgdet v bat1 v cc bgnd v prog ring in v ref fb2 vtx txi vitr rcvp rcvn 26 itr l9216 pr 28-pin plcc
product brief october 2000 short-loop ringing slic with ground start l9216a/g 3 lucent technologies inc. applications 12-3534.j (f) figure 3. third-generation codec ac interface network; complex termination v bat1 bgnd v bat2 v cc agnd icm rgdet ground key not used c bat1 0.1 m f c bat2 0.1 m f c cc 0.1 m f rtflt dcout pr pt v prog v ref c rt 0.1 m f r rt 383 k w lucent l7591 v bat2 fusible or ptc 50 w 50 w cf1 cf2 rate of battery reversal not ramped fb1 fb2 nstat b2 b1 b0 c f1 0.47 m f c f2 0.1 m f ring in vitr rcvp rcvn itr vtx txi r gx 4640 w v bat1 d bat1 v bat2 v cc c tx 0.1 m f c ring 0.47 m f c c1 pcm highway dx0 dr0 dx1 dr1 fs bclk dgnd v dd sync and v dd vfxi vfrop vfron slic4a slic3a slic2a slic0a clock L9216G from/to control b2 b1 nstat b0 0.1 m f fusible or ptc
l u cent t e chnolo g ies inc . res e rves t h e ri g ht t o mak e chan g es t o the p rod u ct(s ) o r i n for m atio n con t aine d he r ein with o ut n o tice. n o li a bil i t y is assu m ed a s a r esult o f thei r us e or a pplicatio n . no r igh t s und e r a n y p aten t accom p a ny th e sale of a ny suc h pro d uct(s ) or in f or m ation. co p yrigh t ? 200 0 luce n t t echn o logies i n c. all righ t s rese r ved octo b er 2000 p b 00-138 a lc f o r a d d i ti o n a l i n fo r m a t i o n , c o n ta c t y o u r m i c r o e l e c t r o n i c s g r o u p a cc o u n t m a n a ge r o r t h e f o l l o wi n g: i n terne t : http://ww w .lucent.com/micro e-m a il: do c m a ste r @mi c ro . luc e nt.com n . a m e r ic a : m i c r o e l e c t r o n i cs g r o u p, l u c e nt t e c hn o l o g i e s i n c ., 5 5 5 u n i o n b o u l e v a r d , r o o m 3 0 l - 1 5 p - b a , a l l e nt o wn , p a 1 8 1 0 9 - 3 2 86 1 - 80 0 - 37 2 - 2 4 4 7 , f a x 6 1 0 - 7 1 2 - 4 10 6 ( i n c a n a d a : 1 - 8 0 0 - 5 5 3 - 2 44 8 , f a x 6 1 0 -7 1 2 - 4 1 0 6 ) a s i a p a cif i c : m i c r o e l e c t r o n i cs g r o u p, l u c e nt t e c hn o l o g i e s s i ng a p o r e p t e . l t d ., 7 7 s c i en c e p a r k d r i v e, # 0 3 - 1 8 c i nt e c h ii i , s i n g a po r e 1 1 8 256 t el . ( 6 5 ) 77 8 8 83 3 , f a x ( 6 5 ) 7 7 7 74 9 5 c h i n a: m i c r o e l e c t r o n i cs g r o u p, l u c e n t t e c h n o l og i e s ( c h i n a ) c o ., l t d., a- f2 , 2 3 / f , z ao f o n g u n i v e rs e b u i l d i n g , 1 8 0 0 zh o n g s h a n x i ro a d, s h an g h a i 2 00 2 3 3 p . r. ch i na t e l . ( 8 6 ) 2 1 6 4 4 0 0 4 6 8 , e x t . 3 2 5 , f a x ( 86 ) 21 64 4 0 06 5 2 j a p a n : m i cr o e l e c t r o n i cs g r o u p, l u c e nt t e c hn o l o g i e s j a p a n l t d ., 7 - 18 , h i g a s h i - g o t a n d a 2 - c h o m e , s h i n a g a wa - k u , t o k y o 1 4 1 , j a p a n t e l . ( 8 1) 3 5 4 21 1 60 0 , f a x ( 8 1 ) 3 5 4 2 1 17 0 0 e u r op e : d a t a r e qu e s t s : m ic r oe l e c tro n ic s g r ou p d a t a li n e : t e l. ( 4 4 ) 7 0 0 0 5 8 2 36 8 , f a x (4 4 ) 1 1 89 3 2 8 1 48 t e c h n i c a l in q u i r i e s : g e r ma n y : ( 4 9 ) 89 9 5 0 8 6 0 (munich ) , united kingdom: ( 4 4 ) 1 3 4 4 8 6 5 9 0 0 ( a scot) , f r a n ce: ( 3 3 ) 1 4 0 8 3 6 8 0 0 (p a r i s), s we d e n : ( 4 6) 8 5 9 4 6 07 00 ( s tockholm), f i nland: ( 3 58 ) 9 3 50 7 6 7 0 ( h e l s i n k i ) , i t a l y : ( 3 9 ) 0 2 6 6 0 8 13 1 (m i l a n ) , s p a i n : ( 3 4 ) 1 8 0 7 1 4 4 1 (madrid)
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