product brief june 2000 L9312 line interface and line access circuit forward battery slic, and ringing relay for tr-57 applications introduction the L9312 is a combination full-feature, ultralow- power slic, and solid-state ringing access relay. it is part of a pin-for-pin compatible family of devices designed to serve a wide variety of applications. the L9312 is optimized for tr-57 access, forward battery only, applications. features slic n 5 v and battery operation n optional automatic battery switch n four operational modes n appropriate for 58 db longitudinal balance applica- tions n minimal external components required at all inter- faces n ultralow power dissipation n software/hardware adjustable dc parameters and supervision thresholds solid-state ring relay n low impulse noise n current-limited switches/thermal protection applications n pair gain n digital loop carrier (dlc) n central office (co) n fiber-in-the-loop (fitl) description the L9312 electronic line interface and line access circuit (lilac) provides all the functions that are nec- essary to interface a codec to the tip and ring of a subscriber loop, integrating the battery feed and ring- ing access relay in one low-power, low-cost package. the L9312 requires a 5 v and battery supply to oper- ate. included is an automatic battery switch. the battery feed offers forward battery and on-hook transmission. it also has a low-power scan and a dis- connect mode. in all operating states, this ic is designed for minimal power dissipation. this device is designed to mini- mize the number of external components required at all interfaces. the dc template, current limit, and overhead voltage and loop supervision threshold are programmable via an applied voltage source. the voltage source may be an external programmable voltage source or derived from the v ref slic output. the integrated solid-state switch offers power ringing access. impulse noise is minimized, thus eliminating the need for external zero-cross switching circuitry.
l u cent t e chnolo g ies inc . res e rves t he r i g ht t o mak e cha n ges t o th e pro d uct(s ) o r info r matio n cont a ined h erei n withou t notice . n o liabilit y i s assu m ed as a r esult o f thei r use or a pplicatio n . no r ights u n der a ny pa t ent acc o mpa n y the s a le of a ny such p rod u ct(s ) or in f orm a tion. co p yrigh t ? 200 0 luce n t t echn o logies i n c. all rights res e rved june 2000 p b 00-047 a lc product brief june 2000 forward battery slic, and ringing relay for tr-57 applications L9312 line interface and line access circuit 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 e n c e p a r k d r i v e, #0 3 - 1 8 c i nt e c h i i i, s i n g a p o r e 1 1 8 2 56 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 na ) c o., l td . , a - f 2 , 2 3 / f , za o fo n g u n i v e r s e b u i l d i n g , 1 8 0 0 zh o ng s h an x i r o a d , s h a n g h ai 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 pa n l t d., 7 - 1 8 , h i g a s h i - got a n d a 2 - c h o m e, s h i n a g aw a - 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 at a r e qu e s t s : m ic r o e l e ct r oni c s g r ou p d a t a l i n e : t el . ( 44 ) 70 0 0 5 8 2 3 6 8 , f a x ( 44 ) 1 1 8 9 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 (stockholm), f inl a nd: ( 3 5 8 ) 9 4 3 5 4 2 80 0 ( h e l si n ki ) , 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) application 1 2 -35 2 7n( f ) r s1 fusible 50 w c v b a t 1 0.1 m f v b a t1 rcvn r t s v pr o g l c t h v b a t c f2 0.1 m f v t x rcvp vfrop v f x in vfron dx0 dr1 fs bclk dg n d v dd pcm h i ghway sync and c l ock i t r c r t s 0 . 1 m f agnd v dd 1 m w 50 w r r i ng 1 0 0 v 130 v secondary o r p t c fusible o r p t c r r t f 400 w ring i ng source c cc 0.1 m f v cc c dd 0.1 m f v dd ad c tx 0 . 1 m f r gx 6. 3 4 k w c c1 r s w pt v ba t 2 / v c c bgn d v ba t 1 d g nd txi vitr prot e ctor 1 8 0 v 330 v secondary prot e ctor v ref c f 2 v b a t2 c vba t 2 0 . 1 m f co n trol voltage pwr t ring la t ch reset s l i c 1a s l i c 0a s l i c 5a ns t at b1 b2 s l i c 4a s l i c 3a b0 s l i c 2a dr0 dx1 t8536 cv dd 0 . 1 m f v dd l93 1 2 (gain of 2) pr 0 . 1 m f
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