VSC9180 fea tures: parallel to serial t ransmit 4receives 16 or 4-bit parallel l vds/l vpecl inputs operating at 155mhz or 622mhz into internal fifo using source synchronous t iming 4 1 6 - b i t 1 5 5 m h z b u s o r 4 - b i t 6 2 2 m h z b u s i s b i t m u l t i p l e x e d to serial 2.5ghz output 4 r e t i m e s f o u r s e r i a l s t s - 1 2 / s t m - 4 i n p u t s a n d d e s k e w s u p to +/- 3 bytes of skew using the a1/a2 boundaries 4byte interleaves four serial sts-12/stm-4 inputs to create an sts-48 like signal 4clear channel non-sonet/sdh capability and support for both sonet/sdh and g.709 otu1 frames serial to parallel receive 4dual 2.5gb/s frequency synchronous serial cml inputs with onboard clock and data recovery 4onboard frame alignment of received signals and large i n t e r n a l f i f o f o r t o l e r a n c e o f u p t o + / - 7 5 n s o f s e r i a l backplane skew 4realignment of incoming signals allows hitless selection of incoming channel for maintenance purposes, and prevents downstream devices from having to reframe in a failure condition VSC9180 arapahoe - 2.5g sonet/sdh backplane t ransceiver 4 h a r d w a r e b a s e d s w i t c h o v e r w i t h i n r e c e i p t o f t w o o r f o u r e r r o r e d frame boundaries 4 l o s s o f s i g n a l , l o s s o f a l i g n m e n t , a n d l o s s o f f r a m e a l a r m i n d i c a t i o n 4received frame pointer output 4 p r o g r a m m a b l e b e r t h r e s h o l d m o n i t o r s b a s e d o n b 1 p a r i t y m o n i t o r i n g of both serial inputs 4 r e t u r n s 1 6 o r 4 - b i t p a r a l l e l l v d s b i t d e - m u l t i p l e x e d o u t p u t s o p e r a t i n g a t 1 5 5 m h z o r 6 2 2 m h z w i t h r e c o v e r e d b u s c l o c k ( n o n i n t e r l e a v e m o d e ) 4returns quad sts-12/stm-4 outputs operating at 622 mb/s (inter - leave mode) 4 c l e a r c h a n n e l n o n - s o n e t / s d h c a p a b i l i t y a n d s u p p o r t f o r b o t h sonet/sdh and g.709 otu1 frames special features 44-bit or 16-bit parallel bus loopback with output bus clock 4parallel loopback also allows quad sts-12/stm-4 retime, realign, and loopback output 4serial loopback with hitless input selection and realignment 4 o n b o a r d d i s c r e t e c m u a n d c r u t o a c c o m m o d a t e n o n - s y n c h r o n o u s tx/rx applications timestream product f amil y pb-VSC9180-001
741 calle plano camarillo, ca 93012 t el: 805.388.3700 fax: 805.388.7565 www .vitesse.com y our partner for success. for more information on v itesse products visit the v itesse web site at www .vitesse.com or contact v itesse sales at (800) vitesse or sales@vitesse.com 2002 v itesse semiconductor corporation t h e v s c 9 1 8 0 i s a m u l t i - r a t e s o n e t / s d h t r a n s c e i v e r w i t h s u p p o r t f o r w o r k i n g a n d p r o t e c t i o n h i t l e s s b a c k p l a n e 1 + 1 p r o t e c t i o n . i t i s d e s i g n e d t o s e r i a l i z e f o u r s t s - 1 2 / s t m - 4 s i g n a l s , o r b y t e i n t e r l e a v e d s o n e t / s d h d a t a f r o m 4 - b i t 6 2 2 m h z o r 1 6 - b i t 1 5 5 m h z p a r a l l e l b u s e s o n t o r e d u n d a n t 2 . 5 g b / s s e r i a l b a c k p l a n e o u t p u t s . i t a l s o r e c e i v e s t w o s y n c h r o n o u s a n d s e r i a l s t s - 4 8 / s t m - 1 6 s i g n a l s , r e c o v e r s t h e c l o c k , d e s k e w s t h e m a n d t h e n a l l o w s h i t l e s s s e l e c t i o n b e t w e e n t h e t w o . s e l e c t i o n c r i t e r i a c a n b e d e r i v e d f r o m b e r m o n i t o r i n g , i n - f r a m e s t a t u s o r s i g n a l i n t e g r i t y m o n i t o r i n g . t h e s e l e c t e d s i g n a l i s d e s e r i a l i z e d t o a 4 - b i t 6 2 2 m h z b u s , a 1 6 - b i t 1 5 5 m h z b u s o r q u a d s t s - 1 2 s o p e r a t i n g a t 6 2 2 m b / s . g e n e r a l d e s c r i p t i o n : VSC9180 arapahoe - 2.5g sonet/sdh backplane t ransceiver the VSC9180 can serialize a 4-bit or 16-bit byte interleaved s t s - 4 8 / s t m - 1 6 b u s t o w o r k i n g a n d p r o t e c t i o n 2 . 5 g b / s i / o (non interleave mode). alternatively it can recover four serial sts-12 backplane signals, re-align them, and interleave them to form a serial sts-48 signal (interleave mode). interleave m o d e a l l o w s t h e v s c 9 1 8 0 t o b e u s e d t o a d d 2 . 5 g b / s backplane connectivity to the vsc9182 40g sts-1 tsi switch, or act as a transponder between existing serial sts-48/stm- 16 signals to serial sts-12/stm-4 backplane architectures. toh transparency is preserved and b1 parity is intelligently r e c a l c u l a t e d f o r c o m p a t i b i l i t y w i t h t h e b a c k p l a n e b e r monitoring of adjacent devices. VSC9180 dual 2.5ghz cdr dmx a1/a2 align deinter - leave rxd a t a[1 5:0]+/- 2:1 rxinb+/- rxina+/- txd a t a[1 5:0]+/- s ts-1 2/s tm-4 phase alignment s ts-48/s tm-1 6 interleaver cmu tx out a+/- tx outb+/- [3:0] 2:1 [1 5:0] [1 5:0] 1 6-bit 1 55mhz 4-bit 622mhz r etiming fifo [1 5:0] dmx mux mux b e r a sic t imestream vsc91 8x vsc91 80 t imestream vsc91 82 40g tsi vsc91 80 vsc91 80 x1 6 4-bit 1 6-bit byte interleaved sonet/sdh bus 4 x s ts-1 2 t imestream bac kplane w/p s ts-48 2.5gb/s i/o w/p s ts-48 2.5gb/s i/o 64 x s ts-1 2 t imestream bac kplane s ts-48 i/o VSC9180 architectures: VSC9180 block diagram:
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