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1 S2058 port bypass and repeater for fibre channel arbitrated loop S2058 ? features ? ansi x3t11 fibre channel compatible ? monolithic clock recovery unit C re-times & buffers received data C jitter peaking < 0.15 db ? lock detect function C run length violation detector C frequency detection ? port bypass circuit ? suitable for both coaxial and optical link applications ? low power operation 0.425w, typical ? 106.25 or 53.125 mhz reference clock ? 28-pin soic package ? 3.3v supply general description the fibre channel port bypass with repeater cir- cuit is used in full-speed (1.0625 gb/s) disk arrays. the S2058 block diagram is shown in figure 1. it contains a monolithic clock recovery unit (cru), a lock detect feature and a port bypass circuit. the cru may be used alone to implement a general purpose repeater needed for many disk array and switch applications where a re-timed and buffered signal is required. the S2058 may be used to imple- ment a single chip arbitrated loop port bypass re- timing node. the S2058 performs the function of a port bypass circuit followed by a clock and data retiming phase locked loop (cdr). the cdr re- times incoming serial data, detects whether a valid signal is present and outputs a low jitter serial data stream. functional description the S2058 performs two functions. the first is a port bypass circuit (pbc) for nodes in a fc-al system. the low jitter accumulation of the port bypass path is essential in these systems. the second function is to retime and restore signal quality in raid drives using the fc-al link configuration. the low jitter transfer peaking and the high jitter tolerance specifi- cations of the clock and data recovery pll are essential in these applications. in addition, the lock figure 1. S2058 block diagram port bypass and repeater for fibre channel arbitrated loop detect circuit monitors the incoming signals for valid 8b/10b run length, transition density and frequency. the output of this circuit is useful for link perfor- mance monitoring and detection of channel present. jitter performance the S2058 complies with the minimum jitter toler- ance requirements proposed by the fibre channel jitter working group when used with differential in- puts and outputs as shown in figure 2. in addition, the S2058 is designed for minimum jitter generation and jitter transfer specifications. this allows the opti- mum system design for arbitrated loop architectures. jitter tolerance input jitter tolerance is defined as the amplitude of frequency dependent, random and deterministic jitter that causes the clock recovery pll to violate the ber specifications. input jitter tolerance specifica- tions are shown in figures 3 and 4. cdr normal 01 S2058 lckrefn refclk lockdet sel ddi p/n ddo p/n in p/n out p/n lpf1 lpf2 refsel test 24 2.2 f (x7r type) 24 device specification
2 S2058 port bypass and repeater for fibre channel arbitrated loop figure 2. fc-al jbod application for repeaters disk storage fc-al disk drive lrc interlock e_store tx rx normal 1 0 s2057 bypass 01 cdr S2058 optics or copper dual sc or db-9 disk storage fc-al disk drive lrc interlock 01 tx rx e_store tx pulldown for bypass in absence of disk drive S2058 s2057
3 S2058 port bypass and repeater for fibre channel arbitrated loop frequency dependent jitter tolerance frequency dependent input jitter tolerance is de- fined as the peak to peak amplitude of sinusoidal jitter applied on the input signal. see figure 3. random jitter tolerance random jitter tolerance is the amount of jitter with a gaussian distribution that the clock recovery pll must tolerate. deterministic jitter tolerance deterministic jitter tolerance is the amount of deter- ministic jitter that the clock recovery pll must toler- ate. jitter transfer jitter transfer is defined as the ratio of jitter on the output signal to the jitter applied on the input signal versus frequency. jitter transfer requirements are shown in figure 5. the measurement condition is that input sinusoidal jitter up to the mask level in figure 4 is applied and the output jitter is measured for compliance to the mask of figure 5. the jitter transfer mask includes specifications for both jitter peaking and bandwidth. lock detect the S2058 lock detect circuit monitors the selected input signal to detect the presence of the channel. this is done by monitoring the run length, transition density and frequency content of the incoming data. the frequency monitor circuit checks the difference between the divided down recovered clock and the externally supplied reference clock (refclk). if the frequency difference of the recovered clock and the reference clock varies by more than +/- 240 ppm the part will be declared out of lock. in the out of lock state the pll will lock to the local reference clock and periodically poll the serial data input looking for data with valid frequency content. in this state the lockdet output will shift between high and low states, mirroring the pll as it locks to refclk (lockdet inactive) and input data (lockdet active). figure 3. input jitter tolerance figure 5. jitter transfer specification figure 4. frequency dependent jitter tolerance mask freq dj/isi rj 10 -12 0 329 612 940 ps ber jitter transfer acceptable range slope = -20 db/decade fc = 1.25 mhz peaking = 0.15 db f c /25,000 (42.5 khz) cut-off freq a f c /1,667 (637 khz) cut-off freq b time (unit interval - ui) 1.5 frequency (hz) (khz) = cut-off freq @ 1,0625 gbps
4 S2058 port bypass and repeater for fibre channel arbitrated loop e m a n n i pl e v e lo / i# n i pn o i t p i r c s e d p t u o n t u o . f f i d l c e p v l o5 , 6 e e s ( . p o o l e h t n i c b p t x e n e h t o t d e t c e n n o c e b o t t u p t u o l a i r e s a t a d d n a k c o l c e h t y b d e m i t e r n e e b s a h t u p t u o s i h t ) . 2 e r u g i f . l l p y r e v o c e r n n i p n i . f f i d l c e p v l i3 , 2. t i u c r i c s s a p y b t r o p s u o i v e r p e h t m o r f t u p n i l a i r e s p i d d n i d d . f f i d l c e p v l i7 2 , 6 2 y b n e v i r d e b d l u o h s t u p n i s i h t . s s a p y b t r o p e h t o t t u p n i l a i r e s s i t u p n i s i h t . s s a p y b t r o p e h t o t d e t c e n n o c e v i r d k s i d l a - c f e h t l a m r o n n i s i s s a p y b t r o p e h t f i k c o l b r d c e h t o t d e t u o r . e d o m g n i t a r e p o k l c f e rl t ti2 2 g n i s i r , z h m 5 2 . 6 0 1 t a y l l a n i m o n , l l p e h t r o f k c o l c e c n e r e f e r . e v i t c a e g d e 1 f p l 2 f p l g o l a n a1 1 , 2 1s n i p r o t i c a p a c r e t l i f p o o l n f e r k c l e t a t s 3 l t t i4 2 o t k c o l o t t p m e t t a l l i w l l p r d c e h t , e v i t c a n i n e h w . w o l e v i t c a e b l l i w l l p r d c e h t , e v i t c a n e h w . ) n o i t a r e p o l a m r o n ( a t a d t u p n i n e h w . ) k l c f e r ( k c o l c e c n e r e f e r l a c o l e h t o t k c o l o t d e c r o f l l p e h t d n a e d o m t s e t o t n i t u p e b l l i w 8 5 0 2 s e h t , d e t c e n n o c s i d . g n i t s e t y r o t c a f r o f d e s s a p y b e b l l i w t e d k c o ll t to7 1 s i l l p r d c e h t s e t a c i d n i t e d k c o l , e v i t c a n e h w . h g i h e v i t c a s i l l p r d c e h t , e v i t c a n i n e h w . m a e r t s a t a d l a i r e s e h t o t d e k c o l a t a d f o s s o l a g n i t a c i d n i k c o l c e c n e r e f e r l a c o l e h t o t d e k c o l ) . n o i t c e s t c e t e d k c o l e e s ( . n o i t i d n o c n o d d p o d d l c e p v lo9 1 , 0 2 e h t f o t r o p t u p n i e h t e v i r d d l u o h s t u p t u o s i h t . t u p t u o s s a p y b t r o p . e v i r d k s i d l a - c f l e sl t ti8 2 t r o p e h t , w o l s i b l e s n e h w . l o r t n o c s s a p y b b s s a p y b t r o p s s a p y b t r o p , h g i h s i l e s n e h w . e d o m s s a p y b n i e b l l i w s s a p y b . e d o m l a m r o n n i e b l l i w d n gd n u o r g , 3 1 , 7 3 2 , 8 1 e r a d n a , e c a f r u s e i d e h t o t d e t n u o m y l l a c i s y h p e r a s n i p d n u o r g l a m r e h t t s e b r o f . h t a p l a m r e h t e h t f o t r a p t n a t r o p m i n a d n u o r g a o t d e t c e n n o c e b d l u o h s s n i p d n u o r g l l a , e c n a m r o f r e p . e l b i s s o p f i s a i v e l p i t l u m g n i s u , e n a l p c c v , 1 2 , 4 1 , 8 5 2 . y l p p u s r e w o p v 3 . 3 + a c c vg o l a n a9 , 4. u r c e h t r o f y l p p u s r e w o p v 3 . 3 + a d n gg o l a n a0 1 , 1u r c e h t r o f d n u o r g t s e t l e v e l 3 l t t i6 1 d l e h n e h w n o i t a r e p o p i h c l a m r o n . t s e t g n i r u t c a f u n a m r o f d e s u . w o l l e s f e rl t ti5 1 . k c o l c e c n e r e f e r z h m 5 2 . 6 0 1 s w o l l a e v i t c a n e h w . w o l e v i t c a . k c o l c z h m 5 2 1 . 3 5 s w o l l a , e v i t c a n i n e h w table 1. pin description
5 S2058 port bypass and repeater for fibre channel arbitrated loop figure 6. S2058 pinout package 28 sel 27 ddin 26 ddip 25 vcc 24 lockrefn 23 gnd 22 refclk 21 vcc 20 ddon 19 ddop gnda 1 inn 2 inp 3 vcca 4 outn 5 outp 6 gnd 7 vcc 8 vcca 9 gnda 10 18 gnd 17 lockdet 16 test 15 refsel lpf2 11 lpf1 12 gnd 13 vcc 14 e c i v e d q ) r i a l l i t s ( a j 8 5 0 2 sw / c ? 3 5 thermal information
6 S2058 port bypass and repeater for fibre channel arbitrated loop figure 7. S2058 28-soic package
7 S2058 port bypass and repeater for fibre channel arbitrated loop r e t e m a r a pn o i t p i r c s e dn i mx a ms t i n us n o i t i d n o c t r t , f e m i t l l a f d n a e s i r k l c f e r0 . 3s n% 0 9 o t % 0 1 t fe c n a r e l o t y c n e u q e r f k l c f e r0 0 1m p p x r d n a k l c f e r n e e w t e b e c n e r e f f i d . y c n e u q e r f a t a d c de l c y c y t u d k l c f e r0 6 / 0 4% s n o i t a c i f i c e p s r e t t i j t u o j rn / p t u o ) s m r ( r e t t i j m o d n a r0 2s p. s i s a b e l p m a s a n o d e t s e t , s m r t u o j dn / p t u o ) p - p ( r e t t i j c i t s i n i m r e t e d0 5s p. s i s a b e l p m a s a n o d e t s e t , k a e p o t - k a e p t j q e r f e c n a r e l o t r e t t i j t n e d n e p e d y c n e u q e r f n / p n i 1 . 0i u e r b i f r e p k s a m e c n a r e l o t r e t t i j . n o i t a c i f i c e p s r e t t i j l e n n a h c t j n a rn / p n i e c n a r e l o t r e t t i j m o d n a r2 2 . 0i uk a e p o t - k a e p t j dn / p n i e c n a r e l o t r e t t i j c i t s i n i m r e t e d8 3 . 0i uz h m 5 2 1 . 3 5 > @ k a e p - o t - k a e p r f x j o t t u p n i ( ) t u p t u o o t n / p n i m o r f g n i k a e p r e f s n a r t r e t t i j n / p t u o 5 1 . 0b dn r e t t a p 0 1 0 1 t r s t f s t u o d & o d d0 5 2s p% 0 8 o t 0 2 table 2. ac characteristics
8 S2058 port bypass and repeater for fibre channel arbitrated loop s r e t e m a r a pn o i t p i r c s e dn i mp y tx a ms t i n us n o i t i d n o c v h o ) l t t ( e g a t l o v h g i h t u p t u o2 . 2v i h o a m 1 . - = v l o ) l t t ( e g a t l o v w o l t u p t u o5 . 0v i l o a m 2 . 1 + = v h i ) l t t ( e g a t l o v h g i h t u p n i0 . 2v v l i ) l t t ( e g a t l o v w o l t u p n i8 . 0v i h i ) l t t ( t n e r r u c h g i h t u p n i0 5a v n i v 4 . 2 = i l i ) l t t ( t n e r r u c w o l t u p n i0 0 5 -0 5 -a v n i v 5 . 0 = d v t u o l a i t n e r e f f i d t u p t u o l c e p v l g n i w s e g a t l o v k a e p - o t - k a e p 0 0 2 10 0 2 2p - p v m v o t ? 0 5 c c v 0 . 2 - d v n i - o t - k a e p l a i t n e r e f f i d r e v i e c e r d n a x r , y t i v i t i s n e s t u p n i k a e p i s 0 0 20 0 6 2p - p v m v c c . d e l p u o c c a , v 3 . 3 = o t d e s a i b c d y l l a n r e t n i v c c v 5 6 . 0 - table 3. lvttl dc characteristics table 4. lvpecl input/output dc characteristics s r e t e m a r a pn o i t p i r c s e dn i mx a ms t i n us n o i t i d n o c v h o e g a t l o v h g i h t u p t u o v c c 1 1 . 1 - v c c 7 6 . 0 - v v l o e g a t l o v w o l t u p t u o v c c 2 - v c c 3 . 1 - v v h i e g a t l o v h g i h t u p n i v c c 7 . 0 - v c c 2 . 0 - vd e l p u o c c a v l i e g a t l o v w o l t u p n i v c c 7 . 0 - v c c 2 . 0 - vd e l p u o c c a v h i t n e r r u c h g i h t u p n i0 5 2 -0 0 2a v l i t n e r r u c w o l t u p n i0 0 2 -0 0 2a
9 S2058 port bypass and repeater for fibre channel arbitrated loop r e t e m a r a pn i mp y tx a ms t i n u v ( e g a t l o v y l p p u s r e w o p l t t c c ) 5 . 04 +v v ( e g a t l o v t u p n i c d l c e p p n i ) 5 . 0 - v c c 5 . 0 + v v ( e g a t l o v t u p n i c d l t t p n i ) 5 . 0 -5 . 5v t u p t u o h g i h r o f s t u p t u o o t d e i l p p a e g a t l o v c d v ( e t a t s l t t n i ) 5 . 0 - v c c 5 . 0 + v i ( t n e r r u c t u p t u o l t t t u o ) h g i h t u p t u o , c d ( ) 0 5a m i ( t n e r r u c t u p t u o l c e p t u o ) h g i h t u p t u o , c d ( ) 0 5a m t ( s a i b r e d n u e r u t a r e p m e t e s a c c ) 5 5 -5 2 1c ? t ( e r u t a r e p m e t e g a r o t s g t s ) 5 6 -0 5 1c ? t u p n i m u m i x a m0 0 4k 10 0 5 1v r e t e m a r a pn i mp y tx a ms t i n u v ( e g a t l o v y l p p u s r e w o p d d ) 1 . 3 +5 . 3 +v ) t ( e g n a r e r u t a r e p m e t g n i t a r e p o t n e i b m a00 7c ? y l p p u s t n e r r u c c c i5 2 10 0 2a m table 5. absolute maximum ratings 1 table 6. recommended operating conditions 2 1. caution: stresses listed under "absolute maximum ratings" may be applied to devices one at a time without causing permanent damage. functionality at or above the values listed is not implied. exposure to these values for extended periods may affect device reliability. 2. amcc guarantees the functional and parametric operation of the part under "recommended operating conditions," except where specifically noted in the ac and dc parametric tables.
10 S2058 port bypass and repeater for fibre channel arbitrated loop figure 8. output circuit figure 9. high speed differential inputs (l_sin/in) backplane 110 110 S2058 inp inn 0.1 f 0.1 f v cc - 0.65v S2058 100 ?
11 S2058 port bypass and repeater for fibre channel arbitrated loop amcc is a registered trademark of applied micro circuits corporation. copyright ? 1998 applied micro circuits corporation november 11, 1998 / revision d amcc reserves the right to make changes to its products or to discontinue any semiconductor product or service without notice, and advises its customers to obtain the latest version of relevant information to verify, before placing orders, that the informati on being relied on is current. amcc does not assume any liability arising out of the application or use of any product or circuit described herein, neither do es it convey any license under its patent rights nor the rights of others. amcc reserves the right to ship devices of higher grade in place of those of lower grade. amcc semiconductor products are not designed, intended, authorized, or warranted to be suitable for use in life-support applications, devices or systems or other critical applications. applied micro circuits corporation ? 6290 sequence dr., san diego, ca 92121 phone: (619) 450-9333 ? (800) 755-2622 ? fax: (619) 450-9885 http://www.amcc.com c e r t i f i e d i s o 9 0 0 1 grade s ?commercial/ industrial 2058 a ?28-pin soic device package x x x x x x grade part number package ordering information

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