protection products 1 www.semtech.com protection products smda05c-7 thru smda24c-7 bidirectional tvs array for protection of seven lines ? transient protection for data lines to iec 61000-4-2 (esd) 15kv (air), 8kv (contact) iec 61000-4-4 (eft) 40a (5/50ns) iec 61000-4-5 (lightning) 12a (8/20s) ? small so-8 surface mount package ? protects seven i/o lines ? working voltages: 5v, 12v, 15v and 24v ? low leakage current ? low operating and clamping voltages ? solid-state silicon avalanche technology description features schematic and pin configuration revision 18/15/06 applications mechanical characteristics the smdaxxc-7 series of transient voltage suppres- sors are designed to protect components which are connected to data and transmission lines from voltage surges caused by electrostatic discharge (esd), electri- cal fast transients (eft), and lightning. tvs diodes are characterized by their high surge capability, low operating and clamping voltages, and fast response time. this makes them ideal for use as board level protection of sensitive semiconductor components. the smdaxxc-7 is designed to provide transient suppression on multiple data lines and i/o ports. the low profile so-8 design allows the user to protect up to seven data and i/o lines with one pack- age. the smdaxxc-7 tvs diode array will meet the surge requirements of iec 61000-4-2 (formerly iec 801-2), level 4, ?human body model? for air and contact discharge. so-8 (top view) ? jedec so-8 package ? molding compound flammability rating: ul 94v-0 ? marking : part number, date code, logo ? packaging : tube or tape and reel per eia 481 ? rs-232 and rs-422 data lines ? microprocessor based equipment ? lan/wan equipment ? notebooks, desktops, and servers ? instrumentation ? peripherals ? set top box ? serial and parallel ports
2 ? 2004 semtech corp. www.semtech.com protection products protection products smda05c-7 thru smda24c-7 absolute maximum rating electrical characteristics g n i t a rl o b m y se u l a vs t i n u ) s 0 2 / 8 = p t ( r e w o p e s l u p k a e pp k p 0 0 3s t t a w e r u t a r e p m e t g n i r e d l o s d a e lt l ) . c e s 0 1 ( 0 6 2c e r u t a r e p m e t g n i t a r e p ot j 5 2 1 + o t 5 5 -c e r u t a r e p m e t e g a r o t st g t s 0 5 1 + o t 5 5 -c 7 - c 5 0 a d m s r e t e m a r a pl o b m y ss n o i t i d n o cm u m i n i ml a c i p y tm u m i x a ms t i n u e g a t l o v f f o - d n a t s e s r e v e rv m w r 5v e g a t l o v n w o d k a e r b e s r e v e rv r b i t a m 1 =6 v t n e r r u c e g a k a e l e s r e v e ri r v m w r c 5 2 = t , v 5 =0 2a e g a t l o v g n i p m a l cv c i p p s 0 2 / 8 = p t , a 1 =8 . 9v t n e r r u c e s l u p k a e p m u m i x a mi p p s 0 2 / 8 = p t7 1a e c n a t i c a p a c n o i t c n u jc j d n a s n i p o / i n e e w t e b d n u o r g v r z h m 1 = f , v 0 = 0 5 3f p 7 - c 2 1 a d m s r e t e m a r a pl o b m y ss n o i t i d n o cm u m i n i ml a c i p y tm u m i x a ms t i n u e g a t l o v f f o - d n a t s e s r e v e rv m w r 2 1v e g a t l o v n w o d k a e r b e s r e v e rv r b i t a m 1 =3 . 3 1v t n e r r u c e g a k a e l e s r e v e ri r v m w r c 5 2 = t , v 2 1 =1a e g a t l o v g n i p m a l cv c i p p s 0 2 / 8 = p t , a 1 =9 1v t n e r r u c e s l u p k a e p m u m i x a mi p p s 0 2 / 8 = p t2 1a e c n a t i c a p a c n o i t c n u jc j d n a s n i p o / i n e e w t e b d n u o r g v r z h m 1 = f , v 0 = 0 2 1f p
3 ? 2004 semtech corp. www.semtech.com protection products protection products smda05c-7 thru smda24c-7 7 - c 5 1 a d m s r e t e m a r a pl o b m y ss n o i t i d n o cm u m i n i ml a c i p y tm u m i x a ms t i n u e g a t l o v f f o - d n a t s e s r e v e rv m w r 5 1v e g a t l o v n w o d k a e r b e s r e v e rv r b i t a m 1 =7 . 6 1v t n e r r u c e g a k a e l e s r e v e ri r v m w r c 5 2 = t , v 5 1 =1a e g a t l o v g n i p m a l cv c i p p s 0 2 / 8 = p t , a 1 =4 2v t n e r r u c e s l u p k a e p m u m i x a mi p p s 0 2 / 8 = p t0 1a e c n a t i c a p a c n o i t c n u jc j d n a s n i p o / i n e e w t e b d n u o r g v r z h m 1 = f , v 0 = 5 7f p 7 - c 4 2 a d m s r e t e m a r a pl o b m y ss n o i t i d n o cm u m i n i ml a c i p y tm u m i x a ms t i n u e g a t l o v f f o - d n a t s e s r e v e rv m w r 4 2v e g a t l o v n w o d k a e r b e s r e v e rv r b i t a m 1 =7 . 6 2v t n e r r u c e g a k a e l e s r e v e ri r v m w r c 5 2 = t , v 4 2 =1a e g a t l o v g n i p m a l cv c i p p s 0 2 / 8 = p t , a 1 =3 4v t n e r r u c e s l u p k a e p m u m i x a mi p p s 0 2 / 8 = p t5a e c n a t i c a p a c n o i t c n u jc j d n a s n i p o / i n e e w t e b d n u o r g v r z h m 1 = f , v 0 = 0 5f p electrical characteristics (continued)
4 ? 2004 semtech corp. www.semtech.com protection products protection products smda05c-7 thru smda24c-7 typical characteristics non-repetitive peak pulse power vs. pulse time power derating curve 0 10 20 30 40 50 60 70 80 90 100 110 0 5 10 15 20 25 30 time ( s) percent of i pp e -t td = i pp /2 waveform parameters: tr = 8 s td = 20 s pulse waveform esd pulse waveform (iec 61000-4-2) 0 10 20 30 40 50 60 70 80 90 100 110 0 25 50 75 100 125 150 ambient temperature - t a ( o c) % of rated power or i pp 0.01 0.1 1 10 0.1 1 10 100 1000 pulse duration - tp (s) peak pulse power - p pk (kw) iec 61000-4-2 discharge parameters l e v e lt s r i f k a e p t n e r r u c ) a ( k a e p t n e r r u c s n 0 3 t a ) a ( k a e p t n e r r u c s n 0 6 t a ) a ( t s e t e g a t l o v t c a t n o c ( ) e g r a h c s i d ) v k ( t s e t e g a t l o v r i a ( ) e g r a h c s i d ) v k ( 15 . 748 2 2 25 184 4 4 35 . 2 22 166 8 40 36 18 8 5 1
5 ? 2004 semtech corp. www.semtech.com protection products protection products smda05c-7 thru smda24c-7 circuit diagram connection diagram device connection for protection of seven data lines the smdaxxc-7 is designed to protect up to 7 data or i/o lines. they are bidirectional devices and may be used on lines where the signal polarities are above and below ground. the smdaxxc-7 tvs arrays employ a monolithic struc- ture. therefore, the working voltage (v rwm ) and break- down voltage (v br ) specifications apply to the differen- tial voltage between any two data line pins. for ex- ample, the smda24c-7 is designed for a maximum voltage excursion of 12v between any two data lines. the device is connected as follows: z pins 1, 2, 3, 4, 5, 6 and 7 are connected to the lines that are to be protected. pin 8 is connected to ground. the ground connections should be made directly to the ground plane for best results. the path length is kept as short as possible to reduce the effects of parasitic inductance in the board traces. circuit board layout recommendations for suppres- sion of esd. good circuit board layout is critical for the suppression of esd induced transients. the following guidelines are recommended: z place the tvs near the input terminals or connec- tors to restrict transient coupling. z minimize the path length between the tvs and the protected line. z minimize all conductive loops including power and ground loops. z the esd transient return path to ground should be kept as short as possible. z never run critical signals near board edges. z use ground planes whenever possible. 123 4 5 6 7 8 data in data out data in data out applications information
6 ? 2004 semtech corp. www.semtech.com protection products protection products smda05c-7 thru smda24c-7 land pattern - so-8 outline drawing - so-8 bxn 2x n/2 tips seating aaa c e/2 2x 12 n a d a1 e1 bbb c a-b d ccc c e/2 a2 see detail a side view a b c d e detail a c l (l1) 01 0.25 gage plane h h h plane 3. dimensions "e1" and "d" do not include mold flash, protrusions or gate burrs. -b- controlling dimensions are in millimeters (angles in degrees). datums and to be determined at datum plane notes: 1. 2. -a- -h- reference jedec std ms-012, variation aa. 4. .050 bsc .236 bsc 8 .010 .150 .189 .154 .193 .012 - 8 0.25 1.27 bsc 6.00 bsc 3.90 4.90 - .157 .197 3.80 4.80 .020 0.31 4.00 5.00 0.51 (.041) .004 .008 - .028 - - - - 0 .016 .007 .049 .004 .053 8 0 0.20 0.10 - 8 0.40 0.17 1.25 0.10 .041 .010 .069 .065 .010 1.35 (1.04) 0.72 - 1.04 0.25 - - - 1.75 1.65 0.25 0.25 - .010 .020 0.50 - l1 n 01 bbb aaa ccc a b a2 a1 d e e1 l h e c dim min millimeters nom dimensions inches min max max nom e (.205) (5.20) z g y p (c) 3.00 .118 1.27 .050 0.60 .024 2.20 .087 7.40 .291 x inches dimensions z p y x dim c g millimeters this land pattern is for reference purposes only. consult your manufacturing group to ensure your company's manufacturing guidelines are met. notes: 1. reference ipc-sm-782a, rlp no. 300a. 2.
7 ? 2004 semtech corp. www.semtech.com protection products protection products smda05c-7 thru smda24c-7 r e b m u n t r a p d a e l h s i n i f l e e r r e p y t qe z i s l e e r b t . 7 - c 5 0 a d m sb p n s0 0 5h c n i 7 b t . 7 - c 2 1 a d m sb p n s0 0 5h c n i 7 b t . 7 - c 5 1 a d m sb p n s0 0 5h c n i 7 b t . 7 - c 4 2 a d m sb p n s0 0 5h c n i 7 t b t . 7 - c 5 0 a d m se e r f b p0 0 5h c n i 7 t b t . 7 - c 2 1 a d m se e r f b p0 0 5h c n i 7 t b t . 7 - c 5 1 a d m se e r f b p0 0 5h c n i 7 t b t . 7 - c 4 2 a d m se e r f b p0 0 5h c n i 7 7 - c 5 0 a d m sb p n se b u t / 5 9a / n 7 - c 2 1 a d m sb p n se b u t / 5 9a / n 7 - c 5 1 a d m sb p n se b u t / 5 9a / n 7 - c 4 2 a d m sb p n se b u t / 5 9a / n t . 7 - c 5 0 a d m se e r f b pe b u t / 5 9a / n t . 7 - c 2 1 a d m se e r f b pe b u t / 5 9a / n t . 7 - c 5 1 a d m se e r f b pe b u t / 5 9a / n t . 7 - c 4 2 a d m se e r f b pe b u t / 5 9a / n ordering information h c n a r b n a w i a t 0 8 3 3 - 8 4 7 2 - 2 - 6 8 8 : l e t fx a0 9 3 3 - 8 4 7 2 - 2 - 6 8 8 : h b m g d n a l r e z t i w s h c e t m e s h c n a r b n a p a j 0 5 9 0 - 8 0 4 6 - 3 - 1 8 : l e t 1 5 9 0 - 8 0 4 6 - 3 - 1 8 : x a f h c n a r b a e r o k tl e7 7 3 4 - 7 2 5 - 2 - 2 8 : f6 7 3 4 - 7 2 5 - 2 - 2 8 : x a ) . k . u ( d e t i m i l h c e t m e s 0 0 6 - 7 2 5 - 4 9 7 1 - 4 4 : l e t 1 0 6 - 7 2 5 - 4 9 7 1 - 4 4 : x a f e c i f f o i a h g n a h s t0 3 8 0 - 1 9 3 6 - 1 2 - 6 8 : l e 1 3 8 0 - 1 9 3 6 - 1 2 - 6 8 : x a f l r a s e c n a r f h c e t m e s 0 0 - 2 2 - 8 2 - 9 6 1 ) 0 ( - 3 3 : l e t 8 9 - 2 1 - 8 2 - 9 6 1 ) 0 ( - 3 3 : x a f f o y r a i d i s b u s d e n w o - y l l o h w a s i g a l a n o i t a n r e t n i h c e t m e s . a . s . u e h t n i s r e t r a u q d a e h s t i s a h h c i h w , n o i t a r o p r o c h c e t m e s h b m g y n a m r e g h c e t m e s 3 2 1 - 0 4 1 - 1 6 1 8 ) 0 ( - 9 4 : l e t 4 2 1 - 0 4 1 - 1 6 1 8 ) 0 ( - 9 4 : x a f contact information for semtech international ag note: lead-free devices are rohs/weee compliant
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