1 S3025 sonet/sdh/atm clock recovery unit bicmos pecl clock generator device specification sonet/sdh/atm clock recovery unit S3025 ? features ? complies with ansi, bellcore, and itu-t specifications for jitter tolerance, jitter transfer and jitter generation ? on-chip high frequency pll with internal loop filter for clock recovery ? supports clock recovery for oc-12/stm-4 (622.08 mbit/s) nrz data ? 12.96 mhz reference frequency ? lock detectmonitors run length and frequency ? 350mw typical power dissipation ? low-jitter pecl interface ? on-chip crystal oscillator allows use of low cost reference crystal ? micro-power bipolar technology ? 5v supply ? available in die form or 20 tssop package general description the function of the S3025 clock recovery unit is to derive high speed timing signals for sonet/sdh- based equipment. the S3025 is implemented using amccs proven phase locked loop (pll) technology. the S3025 receives an oc-12/stm-4 scrambled nrz signal and recovers the clock from the data. the chip outputs a differential pecl bit clock and retimed data. the S3025 utilizes an on-chip pll which consists of a phase detector, a loop filter, and a voltage con- trolled oscillator (vco). the phase detector compares the phase relationship between the vco output and the serial data input. a loop filter converts the phase detector output into a smooth dc voltage, and the dc voltage is input to the vco whose fre- quency is varied by this voltage. a block diagram is shown in figure 2. figure 1. system block diagram transceiver s3028 controller controller transceiver s3028 8 8 8 8 fiber optic module 2x9 fiber optic module 2x9 S3025 S3025
2 S3025 sonet/sdh/atm clock recovery unit figure 2. functional block diagram 2 2 2 serclkop/n serdatop/n xtal1,2 bypass squelchn lckrefn serdatip/n loop filter vco clock divider phase detector lock detector sd cap 1,2
3 S3025 sonet/sdh/atm clock recovery unit overview the S3025 supports clock recovery for the oc-12/ stm-4 data rate. differential serial data is input to the chip at the specified rate and clock recovery is per- formed on the incoming data stream. an external crystal is required to minimize the pll lock time and provide a stable output clock source in the absence of serial input data. retimed data and clock are output from the S3025. characteristics performance the S3025 pll complies with the jitter specifications proposed for sonet/sdh equipment defined by the t1x1.6/91-022 document, when used with differential inputs and outputs as shown in figure 3. jitter transfer jitter transfer functions is defined as the ratio of jitter on the output oc-n/sts-n signal to the jitter applied on the input oc-n/sts-n 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 be applied for each of the oc-n/sts-n rates. input jitter tolerance input jitter tolerance is defined as the peak to peak amplitude of sinusoidal jitter applied on the input sig- nal that causes an equivalent 1 db optical/electrical power penalty. sonet input jitter tolerance require- ments are shown in figure 4. the measurement condition is the input jitter amplitude which causes an equivalent of 1 db power penalty. serial data output set-up and hold time the output set-up and hold times are represented by the waveforms shown in figure 3. jitter generation the jitter of the serial clock and serial data outputs shall not exceed .01 u.i. when a serial data input with less than 14ps rms jitter is presented to the serial data inputs. figure 3. clock output to data transition delay output frequency 622.08 mhz serdatop/n setup time 450 ps serdatop/n hold time 450 ps t su t h serclkop/n serdatop/n figure 4. input jitter tolerance specification f0 f1 f2 f3 ft .15 1.5 15 sinusodal input jitter amplitude (ui p-p) frequency oc/sts level f0 (hz) f2 (hz) f3 (khz) ft (khz) f1 (hz) 12 10 30 300 25 250 figure 5. jitter transfer specification fc p jitter transfer frequency acceptable range slope = -20 db/decade oc/sts level fc (khz) p (db) 12 1,2 500 0.1 1. bellcore specifications: tr-nwt-000253, issue 2, december 1991. 2. ccitt recommendations: g.958.
4 S3025 sonet/sdh/atm clock recovery unit S3025 pin assignment and descriptions 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 i t a d r e s n i t a d r e s . f f i d l c e p i2 3 e s e h t n o s n o i t i s n a r t m o r f d e r e v o c e r s i k c o l c a . n i a t a d l a i r e s . s t u p n i s s a p y bl t ti 6 1o t t s e t n o i t c u d o r p g n i r u d d e s u . h g i h e v i t c a , e l b a n e s s a p y b . n o i t a r e p o l a m r o n r o f d n u o r g o t e i t . l l p e h t n i o c v e h t s s a p y b d sl c e pi5 1e b o t t u p n i l c e p k 0 1 d e d n e - e l g n i s a . h g i h e v i t c a , t c e t e d l a n g i s s s o l a e t a c i d n i o t e l u d o m r e v i e c e r l a c i t p o l a n r e t x e e h t y b n e v i r d e b l l i w l l p e h t , e v i t c a n i s i d s n e h w . r e w o p l a c i t p o d e v i e c e r f o n / p o t a d r e s e h t d n a s t u p n i 2 , 1 l a t x e h t o t k c o l o t d e c r o f d s n e h w . 1 e l b a t e e s . e t a t s w o l c i g o l e h t n i d l e h e b l l i w t u p t u o d e s s e c o r p e b l l i w s n i p n / p i t a d r e s e h t n o a t a d , e v i t c a s i . y l l a m r o n 1 l a t x 2 l a t x g o l a n ai6 7 e s e h t o t d e t c e n n o c s i l a t s y r c t n a n o s e r s e i r e s a . l a t s y r c l a n r e t x e g n i t a r e p o l a i t i n i e h t h s i l b a t s e o t d e s u s i l a t s y r c e h t . s n i p a s a d e s u s i o s l a d n a l l p y r e v o c e r k c o l c e h t f o y c n e u q e r f . t e s e r g n i r u d r o a t a d f o e c n e s b a e h t n i k c o l c y b d n a t s 1 p a c 2 p a c Ci 8 1 7 1 e h t . s n i p e s e h t o t d e t c e n n o c s i r o t i c a p a c r e t l i f p o o l e h t . c i r t c e l e i d r 7 x , e c n a r e l o t % 0 1 f 0 . 1 e b d l u o h s e u l a v r o t i c a p a c n h c l e u q sl t ti5 t u p t u o k c o l c l a i r e s e h t , e v i t c a n e h w . w o l e v i t c a , h c l e u q s k c o l c ] 2 , 1 l a t x [ t u p 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 k c o l o t d e c r o f e b l l i w . e t a t s w o l c i g o l e h t n i d l e h e b l l i w t u p t u o n / p o t a d r e s e h t d n a . 1 e l b a t e e s n f e r k c ll t ti8 k c o l c l a i r e s e h t , e v i t c a n e h w . w o l e v i t c a , e c n e r e f e r o t k c o l t u p 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 k c o l o t d e c r o f e b l l i w t u p t u o . ] 2 , 1 l a t x [ p o t a d r e s n o t a d r e s . f f i d l c e p o4 1 3 1 g n i m o c n i e h t f o n o i s r e v d e y a l e d e h t s i t a h t l a n g i s t u o a t a d l a i r e s l a i r e s f o e g d e g n i l l a f e h t n o d e t a d p u ) i t a d r e s ( m a e r t s a t a d . ) p o k l c r e s ( t u o k c o l c p o k l c r e s n o k l c r e s . f f i d l c e p o2 1 1 1 t u o a t a d l a i r e s h t i w d e n g i l a e s a h p s i t a h t l a n g i s t u o k c o l c l a i r e s ) . 3 e r u g i f e e s ( . ) n / p o t a d r e s ( d n g dd n g9 ) v 0 ( d n u o r g l a t i g i d c c v dv 5 +0 1) v 5 + ( y l p p u s r e w o p l a t i g i d d n g ad n g9 1 , 4) v 0 ( d n u o r g g o l a n a c c v av 5 +0 2 , 1) v 5 + ( y l p p u s r e w o p g o l a n a
5 S3025 sonet/sdh/atm clock recovery unit figure 6. S3025a tssop package all dimensions are in mm. e v i t c a n h c l e u q se v i t c a n i n h c l e u q s d sn f e r k c l k c o l * t c e t e dt c e t e d t c e t e d t c e t e dt c e t e dn / p o k l c r e sn / p t a d r e sn / p o k l c r e sn / p t a d r e s x x 0 1 x 0 x 1 0 x x 1 0 0 0 e v i t c a 0 0 e v i t c a e v i t c a e v i t c a e v i t c a e v i t c a 0 0 0 e v i t c a table 1. clock squelch enable function 1. lockdet is not a pin. this column indicates the state of the internal lock detect state machine. (see lock detect description .)
6 S3025 sonet/sdh/atm clock recovery unit performance specifications 1. guaranteed but not tested. r e t e m a r a pn i mp y tx a ms t i n un o i t i d n o c o c v l a n i m o n y c n e u q e r f r e t n e c 8 0 . 2 2 6z h m k c o l c e c n e r e f e r e c n a r e l o t y c n e u q e r f y r e v o c e r k c o l c 1 0 5 2 -0 5 2 +m p p 2 1 - s t s / 2 1 - c o e g n a r e r u t p a c t u p t u o k c o l c e l c y c y t u d5 4 m p p 0 0 5 5 5i u f o % e c n e r e f e r d e x i f o t t c e p s e r h t i w y c n e u q e r f f o y t i s n e d n o i t i s n a r t m u m i n i m % 0 2 e m i t k c o l n o i t i s i u q c a 1 2 1 - s t s / 2 1 - c o 6 1c e s p u d e r e w o p y d a e r l a e c i v e d h t i w . k l c f e r d i l a v d n a & e s i r t u p t u o l c e p s e m i t l l a f 0 0 6s p v 2 - o t 0 5 , % 0 9 o t % 0 1 p a c f p 5 , d a o l t n e l a v i u q e n / p o k l c r e s n o i t a r e n e g r e t t i j 5 0 0 .1 0 .. i . u n o r e t t i j s m r s p 4 1 n a h t s s e l h t i w s t u p n i a t a d n / p i t a d r e s 2 1 - s t s / 2 1 - c o e c n a r e l o t r e t t i j 1 5 . 0. i . u e d u t i l p m a . r e t t i j t u p n i l a d i o s u n i s m o r f s t u p n i a t a d n / p i t a d r e s n o . z h m 5 o t z h k 0 5 2
7 S3025 sonet/sdh/atm clock recovery unit recommended operating conditions absolute maximum ratings r e t e m a r a pn i mp y tx a mt i n u s a i b r e d n u e r u t a r e p m e t e s a c5 5 -5 2 1 +c s a i b r e d n u e r u t a r e p m e t n o i t c n u j5 5 -0 5 1 +c e r u t a r e p m e t e g a r o t s5 6 -0 5 1 +c d n g o t t c e p s e r h t i w c c v n o e g a t l o v5 . 0 -0 . 7 +v n i p t u p n i l t t y n a n o e g a t l o v5 . 0 -5 . 5 +v n i p t u p n i l c e p y n a n o e g a t l o v0 . 2 - c c vc c vv t n e r r u c k n i s t u p t u o l t t 0 2a m t n e r r u c e c r u o s t u p t u o l t t 0 1a m t n e r r u c e c r u o s t u p t u o l c e p d e e p s h g i h 0 5a m e g a t l o v e g r a h c s i d c i t a t s 0 0 5v r e t e m a r a pn i mp y tx a mt i n u ) l a i r t s u d n i ( s a i b r e d n u e r u t a r e p m e t t n e i b m a0 4 -5 8 +c ) l a i c r e m m o c ( s a i b r e d n u e r u t a r e p m e t t n e i b m a00 7 +c s a i b r e d n u e r u t a r e p m e t n o i t c n u j0 1 -0 3 1 +c d n g o t t c e p s e r h t i w c c v n o e g a t l o v5 7 . 40 . 55 2 . 5v n i p t u p n i l t t y n a n o e g a t l o v0 . 0c c vv n i p t u p n i l c e p y n a n o e g a t l o v2 - c c vc c vv ) v 2 - c c v o t 0 5 ( t n e r r u c e c r u o s t u p t u o l c e p 4 15 2a m t n e r r u c y l p p u s c c i 0 70 0 1a m
8 S3025 sonet/sdh/atm clock recovery unit ttl input/output dc characteristics 2 1. these input levels provide a zeroCnoise immunity and should only be tested in a static, noise-free environment. symbol parameter test conditions min max unit v il 1 v ih 1 i il i ih i i i os v ik v ol v oh input low voltage input high voltage input low current input high current input high current at max vcc output short circuit current input clamp diode voltage ttl output low voltage ttl output high voltage guaranteed input low voltage for all inputs v cc = max, v in = 0.5v v cc = max, v in = 2.7v v cc = max, v in = 5.25v v cc = max, v out = 0.5v v cc = min, i in = -18.0ma v cc = min, i ol = 8ma v cc = min, i oh = -1.0ma 2.0 -400.0 -100.0 2.4 0.8 50.0 1.0 -25.0 0.5 volts volts ua ua ma ma volts volts -1.2 volts guaranteed input high voltage for all inputs (t a = -40 c to +85 c, v cc = 5 v 5%) symbol v il v ih v il v ih v ol v oh v od v id i ih i il input low voltage input high voltage input low voltage input high voltage output low voltage output high voltage guaranteed input low voltage for single-ended inputs guaranteed input high voltage for single-ended inputs guaranteed input low voltage for differential inputs guaranteed input high voltage for differential inputs 50 ohm termination to v cc -2v 50 ohm termination to v cc -2v differential output voltage differential input voltage v id = 500mv v id = 500mv -0.500 -0.500 0.390 0.250 0.500 v cc -2.000 v cc -1.225 v cc -1.441 v cc -0.570 v cc -2.000 v cc -0.700 v cc -1.750 v cc -0.450 v cc -2.000 v cc -1.500 v cc -1.110 v cc -0.670 volts volts volts volts volts volts volts volts a a 20.000 20.000 1.400 1.330 output diff. voltage input diff. voltage input high current input low current parameter min typ max unit conditions pecl input/output dc characteristics (t a = -40 c to +85 c, v cc = 5 v 5%) parameter min typ max units condition frequency 12.96 mhz accuracy -500 +500 ppm external series resonant crystal specifications
9 S3025 sonet/sdh/atm clock recovery unit grade part package s-commercial/ 3025 a C 20 tssop industrial ordering information x xxxx x grade part number package C amcc is a registered trademark of applied micro circuits corporation. copyright ? 1997 applied micro circuits corporation june 2, 1997 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
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