protection products 1 www.semtech.com protection products smda05c-8 through smda24c-8 bidirectional tvs array for protection of eight 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-14 surface mount package ? protects eight 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 circuit diagram schematic & pin configuration revision 04/12/05 applications mechanical characteristics the smdaxxc-8 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-8 is designed to provide transient suppression on multiple data lines and i/o ports. the low profile so-14 design allows the user to protect up to eight data and i/o lines with one pack- age. they are bidirectional device and may be used on lines where the normal operating voltage is above and below ground (i.e. -12v to +12v). the smdaxxc-8 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-14 (top view) ? rs-232 and rs-422 data lines ? microprocessor based equipment ? lan/wan equipment ? set-top box ? notebooks, desktops, and servers ? portable instrumentation ? peripherals ? serial and parallel ports ? jedec so-14 package ? molding compound flammability rating: ul 94v-0 ? marking : part number, logo, date code ? packaging : tape and reel per eia 481 ? rohs/weee compliant 1 2 3 4 5 6 78 9 10 11 12 13 14 7 & 8 2 3 12 13 5 6 9 10 1 & 14 www.datasheet.in
2 ? 2005 semtech corp. www.semtech.com protection products protection products smda05c-8 through smda24c-8 absolute maximum rating electrical characteristics g n i t a rl o b m y se u l a vs t i n u t ( r e w o p e s l u p k a e p p ) s 0 2 / 8 =p 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 8 - 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 t , a 1 = p s 0 2 / 8 =8 . 9v t n e r r u c e s l u p k a e pi p p t p s 0 2 / 8 =7 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 8 - 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 t , a 1 = p s 0 2 / 8 =9 1v t n e r r u c e s l u p k a e pi p p t p s 0 2 / 8 =2 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 www.datasheet.in
3 ? 2005 semtech corp. www.semtech.com protection products smda05c-8 through smda24c-8 8 - 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 t , a 1 = p s 0 2 / 8 =4 2v t n e r r u c e s l u p k a e pi p p t p s 0 2 / 8 =0 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 8 - 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 t , a 1 = p s 0 2 / 8 =3 4v t n e r r u c e s l u p k a e pi p p t p s 0 2 / 8 =5a 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) www.datasheet.in
4 ? 2005 semtech corp. www.semtech.com protection products protection products smda05c-8 through smda24c-8 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 = 8s td = 20s 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 - t p (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 www.datasheet.in
5 ? 2005 semtech corp. www.semtech.com protection products smda05c-8 through smda24c-8 circuit diagram connection diagram device connection for protection of eight data lines the smdaxxc-8 is designed to protect up to 8 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-8 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-8 is designed for a maximum voltage excursion of 12v between any two data lines. the device is connected as follows: z pins 2, 3, 5, 6, 9, 10, 12 and 13 are connected to the lines that are to be protected. pins 1, 7, 8, and 14 are 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. pins 4 and 11 are not connected. 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. gnd gnd i/o 1 i/o 2 n.c. i/o 3 i/o 4 gnd n.c. gnd i/o 5 i/o 6 i/o 7 i/o 8 1 2 3 4 5 6 7 8 9 10 11 12 13 14 applications information matte tin lead finish matte tin has become the industry standard lead-free replacement for snpb lead finishes. a matte tin finish is composed of 100% tin solder with large grains. since the solder volume on the leads is small com- pared to the solder paste volume that is placed on the land pattern of the pcb, the reflow profile will be determined by the requirements of the solder paste. therefore, these devices are compatible with both lead-free and snpb assembly techniques. in addition, unlike other lead-free compositions, matte tin does not have any added alloys that can cause degradation of the solder joint. www.datasheet.in
6 ? 2005 semtech corp. www.semtech.com protection products protection products smda05c-8 through smda24c-8 land pattern - so-14 outline drawing - so-14 bxn 2x n/2 tips seating aaa c e/2 2x 3 a d a1 e1 bbb c a-b d ccc c a2 plane n 12 a e d c b detail a c l (l1) 01 0.25 gage plane h h h see detail a side view 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 ab. 4. .050 bsc .236 bsc 14 .010 .150 .337 .154 .341 .012 - 14 0.25 1.27 bsc 6.00 bsc 3.90 8.65 - .157 .344 3.80 8.55 .020 0.31 4.00 8.75 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 ccc aaa bbb 01 n dim e1 d a1 a2 dimensions millimeters min e l h e b c inches nom min a max max nom e z g y p (c) x 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. 302a. 2. .291 .087 .024 .118 (.205) inches dimensions z p y x dim c g millimeters .050 (5.20) 7.40 2.20 0.60 3.00 1.27 www.datasheet.in
7 ? 2005 semtech corp. www.semtech.com protection products smda05c-8 through smda24c-8 contact information semtech corporation protection products division 200 flynn road, camarillo, ca 93012 phone: (805)498-2111 fax (805)498-3804 ordering information r e b m u n t r a ph s i n i f d a e l r e p y t q l e e r l e e r e z i s b t . 8 - c 5 0 a d m sb p n s0 0 5h c n i 7 b t . 8 - c 2 1 a d m sb p n s0 0 5h c n i 7 b t . 8 - c 5 1 a m d sb p n s0 0 5h c n i 7 b t . 8 - c 4 2 a d m sb p n s0 0 5h c n i 7 t b t . 8 - c 5 0 a d m se e r f b p0 0 5h c n i 7 t b t . 8 - c 2 1 a d m se e r f b p0 0 5h c n i 7 t b t . 8 - c 5 1 a m d se e r f b p0 0 5h c n i 7 t b t . 8 - c 4 2 a d m se e r f b p0 0 5h c n i 7 8 - c 5 0 a d m sb p n se b u t / 6 5a / n 8 - c 2 1 a d m sb p n se b u t / 6 5a / n 8 - c 5 1 a m d sb p n se b u t / 6 5a / n 8 - c 4 2 a d m sb p n se b u t / 6 5a / n t . 8 - c 5 0 a d m se e r f b pe b u t / 6 5a / n t . 8 - c 2 1 a d m se e r f b pe b u t / 6 5a / n t . 8 - c 5 1 a m d se e r f b pe b u t / 6 5a / n t . 8 - c 4 2 a d m se e r f b pe b u t / 6 5a / n www.datasheet.in
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