protection products 1 www.semtech.com preliminary protection products SD05C through sd24c single line tvs diode for esd protection in portable electronics description features schematic & pin configuration revision 07/06/04 applications mechanical characteristics the sdxxc tvs diodes are designed to replace multi- layer varistors (mlvs) in portable applications such as cell phones, notebook computers, and pda?s. they offer superior electrical characteristics such as lower clamping voltage and no device degradation when compared to mlvs. the sdxxc series tvs diodes are designed to protect sensitive semiconductor compo- nents from damage or upset due to electrostatic discharge (esd) and other voltage induced transient events. the sdxxc is in a sod-323 package and will protect one bidirectional line. they are available with working voltages of 5 - 24 volts. these devices will fit on the same pcb pad area as an 0805 mlv device. they give the designer the flexibility to protect one line in applica- tions where arrays are not practical. additionally, it may be ?sprinkled? around the board in applications where board space is at a premium. they may may be used to meet the esd immunity requirements of iec 61000-4-2, level 4 (15kv air, 8kv contact discharge). ? 350 watts peak pulse power (t p = 8/20s) ? 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) 24a (8/20s) ? small package for use in portable electronics ? suitable replacement for mlv?s in esd protection applications ? protects one i/o or power line ? low clamping voltage ? working voltages: 5v, 12v, 15v, 24v ? low leakage current ? solid-state silicon avalanche technology ? eiaj sod-323 package ? molding compound flammability rating: ul 94v-0 ? marking : marking code ? packaging : tape and reel per eia 481 ? cell phone handsets and accessories ? microprocessor based equipment ? personal digital assistants (pda?s) ? notebooks, desktops, and servers ? portable instrumentation ? pagers ? peripherals sod-323 (top view) 12 http://www..net/ datasheet pdf - http://www..net/
2 ? 2004 semtech corp. www.semtech.com protection products SD05C through sd24c absolute maximum rating electrical characteristics s v t c 5 0 d 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 1a e g a t l o v g n i p m a l cv c i p p t , a 5 = p s 0 2 / 8 =8 . 9v e g a t l o v g n i p m a l cv c i p p t , a 4 2 = p s 0 2 / 8 =5 . 4 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 =4 2a e c n a t i c a p a c n o i t c n u jc j v r z h m 1 = f , v 0 =0 0 2f p s v t c 2 1 d 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 5 = p s 0 2 / 8 =9 1v e g a t l o v g n i p m a l cv c i p p t , a 5 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 =5 1a e c n a t i c a p a c n o i t c n u jc j v r z h m 1 = f , v 0 =0 0 1f p 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 5 3s t t a w ) 2 - 4 - 0 0 0 1 6 c e i r e p m r o f e v a w m b h ( e g a t l o v d s ev d s e 0 3v k 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 http://www..net/ datasheet pdf - http://www..net/
3 ? 2004 semtech corp. www.semtech.com preliminary protection products SD05C through sd24c electrical characteristics (continued) s v t c 5 1 d 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 5 = p s 0 2 / 8 =4 2v e g a t l o v g n i p m a l cv c i p p t , a 2 1 = p s 0 2 / 8 =9 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 =2 1a e c n a t i c a p a c n o i t c n u jc j v r z h m 1 = f , v 0 =5 7f p s v t c 4 2 d 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 5 = p s 0 2 / 8 =0 4v e g a t l o v g n i p m a l cv c i p p t , a 8 = p s 0 2 / 8 =4 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 =8a e c n a t i c a p a c n o i t c n u jc j v r z h m 1 = f , v 0 =0 5f p http://www..net/ datasheet pdf - http://www..net/
4 ? 2004 semtech corp. www.semtech.com protection products SD05C through sd24c 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 25 50 75 100 125 150 ambient temperature - t a ( o c) % of rated power or i pp clamping voltage vs. peak pulse current 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 0.01 0.1 1 10 0.1 1 10 100 1000 pulse duration - t p (s) peak pulse power - p pk (kw) 0 5 10 15 20 25 30 0 5 10 15 20 25 30 peak pulse current - i pp (a) clamping voltage - v c (v) waveform parameters: tr = 8s td = 20s sd05 c sd12c http://www..net/ datasheet pdf - http://www..net/
5 ? 2004 semtech corp. www.semtech.com preliminary protection products SD05C through sd24c device connection options the sdxxc tvs diodes are designed to protect one data, i/o, or power supply line. the device is designed to replace multi-layer varistors (mlvs) in portable applications. it is easily implemented on existing 0805 mlv pads and is only slightly larger than 0603 mlv pads. the device is bidirectional and may be used on lines where the signal polarity is above and below ground. the device is symmetrical, so there is no cathode band. circuit board layout recommendations for suppres- sion of esd. good circuit board layout is critical for the suppression of fast rise-time transients such as esd. the following guidelines are recommended (refer to application note si99-01 for more detailed information): z place the tvs near the input terminals or connectors to restrict transient coupling. z minimize the path length between the tvs and the protected line. z the esd transient return path to ground should be kept as short as possible. z place a tvs and decoupling capacitor between power and ground of components that may be vulnerable to electrostatic discharges to the ground plane. z minimize all conductive loops including power and ground loops. z use multilayer boards when possible. z minimize interconnecting line lengths z never run critical signals near board edges. z fill unused portions of the pcb with ground plane. 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. device schematic and pin configuration size comparison to 0805 mlv sod-323 0805 mlv note: nominal dimensions in inches component placement comparison 0805 mlv on sod-323 on 0805 mlv pad sod-323 on recommended (sod-323) solder pad 0805 solder pad applications information http://www..net/ datasheet pdf - http://www..net/
6 ? 2004 semtech corp. www.semtech.com protection products SD05C through sd24c land pattern - sod-323 outline drawing - sod-323 http://www..net/ datasheet pdf - http://www..net/
7 ? 2004 semtech corp. www.semtech.com preliminary protection products SD05C through sd24c contact information semtech corporation protection products division 200 flynn rd., camarillo, ca 93012 phone: (805)498-2111 fax (805)498-3804 t r a p r e b m u n h s i n i f d a e l r e p y t q l e e r e z i s l e e r c t . c 5 0 d sb p n s0 0 0 , 3? 7 c t . c 2 1 d sb p n s0 0 0 , 3? 7 c t . c 5 1 d sb p n s0 0 0 , 3? 7 c t . c 4 2 d sb p n s0 0 0 , 3? 7 t c t . c 5 0 d se e r f b p0 0 0 , 3? 7 t c t . c 2 1 d se e r f b p0 0 0 , 3? 7 t c t . c 5 1 d se e r f b p0 0 0 , 3? 7 t c t . c 4 2 d se e r f b p0 0 0 , 3? 7 marking codes ordering information part number marking code SD05C sd12c sd15c sd24c 5/ 5 6/ 6 7/ 7 8/ 8 http://www..net/ datasheet pdf - http://www..net/
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