protection products 1 www.semtech.com preliminary protection products - railclamp ? ? ? ? ? rclamp0544t railclamp ? ? ? ? ? ultra low capacitance tvs arrays description features dimensions circuit diagram revision 2/25/2011 railclamps ? are ultra low capacitance tvs arrays designed to protect high speed data interfaces. this series has been specifically designed to protect sensitive components which are connected to high-speed data and transmission lines from overvoltage caused by esd (electrostatic discharge), cde (cable discharge events), and eft (electrical fast transients). the rclamp ? 0544t has a typical capacitance of only 0.30pf between i/o pins. this allows it to be used on circuits operating in excess of 3ghz without signal attenuation. they may be used to meet the esd immunity requirements of iec 61000-4-2. each device is designed to protect four lines (two differential pairs). the rclamp0544t is in an 8-pin slp2010p8t package. it measures 2.0 x 1.0 x 0.4mm. the leads are spaced at a pitch of 0.4mm and are finished with lead-free nipdau. they are designed for easy pcb layout by allowing the traces to run straight through the device. the combina- tion of small size, low capacitance, and high level of esd protection makes them a flexible solution for applica- tions such as mini hdmi, mddi, usb, and esata inter- faces. applications mechanical characteristics ? cell phones and accessories ? hdmi ? mddi ports ? usb 3.0 ? lvds ? esata ? pci express ? esd protection for high-speed data lines to iec 61000-4-2 (esd) 18kv (air), 12kv (contact) iec 61000-4-5 (lightning) 5a (8/20 s) iec 61000-4-4 (eft) 40a (5/50ns) ? package design optimized for high speed lines ? flow-through design ? protects four i/o lines ? low capacitance: 0.3pf typical (i/o to i/o) ? low clamping voltage ? low operating voltage: 5v ? solid-state silicon-avalanche technology ? slp2010p8t 8-pin package (2.0 x 1.0 x 0.4mm) ? pb-free, halogen free, rohs/weee compliant ? lead pitch: 0.4mm ? lead finish: nipdau ? marking: marking code + date code ? packaging: tape and reel 4-line protection nominal dimensions in mm 2.00 1.00 0.40 0.40 bsc 12 34 5 6 7 8 gnd pin 1 pin 2 pin 3 pin 4 gnd note: pins 5-8 not internally connected
2 ? 2011 semtech corp. www.semtech.com preliminary protection products rclamp0544t absolute maximum rating electrical characteristics (t=25 o c) 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 5 7s t t a w ) s 0 2 / 8 = p t ( t n e r r u c e s l u p k a e pi p p 5a ) r i a ( 2 - 4 - 0 0 0 1 6 c e i r e p d s e ) t c a t n o c ( 2 - 4 - 0 0 0 1 6 c e i r e p d s e v d s e 8 1 - / + 2 1 - / + v k 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 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 d n g o t 4 r o , 3 , 2 , 1 n i p5v 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 = d n g o t 4 r o , 3 , 2 , 1 n i p 5 . 681 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 , v 0 . 5 = d n g o t 4 r o , 3 , 2 , 1 n i p 5 0 0 . 00 0 1 . 0a 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 = d n g o t 4 r o , 3 , 2 , 1 n i p 2 1v 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 5 = d n g o t 4 r o , 3 , 2 , 1 n i p 5 1v 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 = d n g o t 4 r o , 3 , 2 , 1 n i p 5 4 . 00 6 . 0f p v r , z h m 1 = f , v 0 = s n i p o / i n e e w t e b 3 . 04 . 0f p
3 ? 2011 semtech corp. www.semtech.com preliminary protection products rclamp0544t typical characteristics non-repetitive peak pulse power vs. pulse time pulse waveform normalized capacitance vs. reverse voltage 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 0.01 0.1 1 10 0.1 1 10 100 pulse duration - tp (us) peak pulse power - p pp (kw) clamping voltage vs. peak pulse current note: data is taken with a 10x attenuator 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 012345 reverse voltage - v r (v) c j (v r ) / c j (v r =0) f = 1mhz esd clamping (pin 1, 2, 3, or 4 to gnd) (+8kv contact per iec 61000-4-2) 0 5 10 15 20 25 0123456 peak pulse current - i pp (a) clamping voltage -v c (v) waveform parameters: tr = 8s td = 20s line to gnd line to line usb 2.0 eye pattern with rclamp0544t
4 ? 2011 semtech corp. www.semtech.com preliminary protection products rclamp0544t insertion loss s21 - i/o to i/o typical characteristics (con?t) 1 2 3 4 5 start . 030 mhz 3 stop 000 . 000 000 mhz ch1 s21 log 6 db / ref 0 db 1: -0.0715 db 800 mhz 2: -0.0442 db 900 mhz 3: -0.4690 db 1.8 ghz 4: -0.5150 db 2.5 ghz 0 db -6 db -12 db -18 db -24 db -30 db -36 db 1 ghz 100 mhz 3 ghz 10 mhz 1 mhz -42 db -48 db insertion loss s21 - i/o to gnd 1 2 3 4 5 start . 030 mhz 3 stop 000 . 000 000 mhz ch1 s21 log 6 db / ref 0 db 1: -0.2214 db 800 mhz 2: -0.2095 db 900 mhz 3: -0.6419 db 1.8 ghz 4: -0.2029 db 2.5 ghz 0 db -6 db -12 db -18 db -24 db -30 db -36 db 1 ghz 100 mhz 3 ghz 10 mhz 1 mhz -42 db -48 db hdmi eye pattern (1080p with rclamp0544t) hdmi eye pattern (720p with rclamp0544t)
5 ? 2011 semtech corp. www.semtech.com preliminary protection products rclamp0544t figure 2 - flow through layout using figure 2 - flow through layout using figure 2 - flow through layout using figure 2 - flow through layout using figure 2 - flow through layout using rclamp0544t rclamp0544t rclamp0544t rclamp0544t rclamp0544t design recommendations for hdmi protection adding external esd protection to hdmi ports can be challenging. first, esd protection devices have an inherent junction capacitance. when adding even a small amount of capacitance, it will cause the impedance of the differential pair to drop. second, large packages and land pattern requirements can cause discontinuities that adversely affect signal integrity. the rclamp0544t is specifically designed for protection of high-speed interfaces, such as hdmi. it presents <0.3pf capacitance between the pairs while being rated to handle >8kv esd contact discharges (>15kv air discharge) as outlined in iec 61000-4-2. the device is in a leadless slp package that is less than 1.1mm wide. it is designed such that the traces flow straight through the device. the narrow package and flow-through design reduce discontinuities and minimize impact on signal integrity. this becomes even more critical as signal speeds increase. pin configuration figure 2 is an example of how to route the high speed differential traces through the rclamp0544t. the pcb traces are used to connect the pin pairs for each line (pin 1 to pin 8, pin 2 to pin 7, pin 3 to pin 6, pin 4 to pin 5). for example, line 1 enters at pin 1 and exits at pin 8, and the pcb trace connects pin 1 and 8 to- gether. this is true for lines connected at pins 2, 3, and 4 also. note that there are no internal connec- tions to pins 5 - 8. ground is connected at the center tabs. one large ground pad should be used in lieu of two separate pads. tdr measurements for hdmi the combination of low capacitance, small package, and flow-through design means it is possible to use these devices to meet the hdmi impedance require- ments of 100 ohm 15% without any pcb board modification. for signal integrity purposes, the best results will be obtained by using the rclamp0544t to protect the high-speed differential pairs. this is because the device is designed such that the data lines from the connector line up with the i/o pins of the device without altering the trace routing. applications information figure 1 - slp2010p8t pin configuration (top view) 1 2 3 45 6 7 8 gnd input 1 input 2 input 3 input 4 nc nc nc nc n i pn o i t a c i f i t n e d i 4 , 3 , 2 , 1s e n i l t u p n i 8 , 7 , 6 , 5 s e n i l t u p t u o ) n o i t c e n n o c l a n r e t n i o n ( b a t r e t n e cd n u o r g
6 ? 2011 semtech corp. www.semtech.com preliminary protection products rclamp0544t figure 3. hdmi protection example figure 3. hdmi protection example figure 3. hdmi protection example figure 3. hdmi protection example figure 3. hdmi protection example applications information figure 4. esa figure 4. esa figure 4. esa figure 4. esa figure 4. esa t t t t t a pr a pr a pr a pr a pr o o o o o t t t t t ection exam ection exam ection exam ection exam ection exam ple ple ple ple ple data 2+ data 2- data 1+ data 1- data 0+ data 0- clk+ clk - cec scl 5vpower to hdmi graphics chip data 2+ data 2- data 1+ data 1- - - sda gnd hp detect to hdmi graphics chip rclamp0544t (3 each) dev rx + dev rx - dev tx - dev tx + esata device plug a + a - b - b + rclamp0544t b - b - esata host plug a + a - b - b + host tx + host tx - host rx - host rx + rclamp0544t dev rx + dev rx - dev tx - dev tx + esata device plug a + a - b - b + b - b + rclamp0544t b - b - b - b - esata host plug esata host plug a + a - b - b + b - b + host tx + host tx - host rx - host rx + host tx + host tx - host rx - host rx + rclamp0544t
7 ? 2011 semtech corp. www.semtech.com preliminary protection products rclamp0544t applications information figure 5. mddi protection example figure 5. mddi protection example figure 5. mddi protection example figure 5. mddi protection example figure 5. mddi protection example mddi link controller mddi link controller host display mddi_data0+ mddi_data0- mddi_data1+ mddi_data1- mddi_stb- mddi_stb+ rclamp0522t rclamp0522t gnd gnd uclamp0501p host pwr host gnd uclamp0501p rclamp0544t rclamp0544t gnd gnd
8 ? 2011 semtech corp. www.semtech.com preliminary protection products rclamp0544t applications information - spice model rclamp0544t spice model s r e t e m a r a p e c i p s t 4 4 5 0 p m a l c r r e t e m a r a pt i n u1 d2 d3 d s ip m a0 2 - e 10 2 - e 12 1 - e 2 v bt l o v0 0 10 0 12 . 8 j vt l o v3 8 . 03 8 . 06 . 0 s rm h o5 . 16 . 02 . 0 v b ip m a3 - e 13 - e 13 - e 1 o j cd a r a f2 1 - e 5 2 . 02 1 - e 5 2 . 02 1 - e 6 5 t tc e s9 - e 1 4 5 . 29 - e 1 4 5 . 29 - e 1 4 5 . 2 m- -1 0 . 01 0 . 03 2 . 0 n- -1 . 11 . 11 . 1 g ev e1 1 . 11 1 . 11 1 . 1 note: spice model is for simulating transient response only.
9 ? 2011 semtech corp. www.semtech.com preliminary protection products rclamp0544t outline drawing - so-8 land pattern - slp2010p8t outline drawing - slp2010p8t bxn e/2 lxn a1 r 0.075 d/2 1.00 .039 e 2.08 1.95 .082 .077 0.95 1.08 .043 .037 e d a aaa c pin 1 indicator (laser mark) b c seating plane 1 e 2 n a2 a bbb c a b inches .016 bsc b .006 bbb aaa n l e d .013 dim a1 a2 a min 0.00 .015 0.25 0.15 .010 0.20 .008 0.43 0.32 .004 .003 8 .015 .079 .017 0.08 0.10 8 0.38 2.00 0.40 bsc millimeters max 0.05 0.43 dimensions min 0.00 nom (.005) .016 .001 max .002 .017 nom 0.37 0.02 (0.13) 0.40 controlling dimensions are in millimeters (angles in degrees). notes: 1. (c) g z controlling dimensions are in millimeters (angles in degrees). 1. x p y this land pattern is for reference purposes only. consult your manufacturing group to ensure your notes: 2. dim x y p g c millimeters inches (0.88) .008 .026 .008 .016 (.035) 0.20 0.67 0.40 0.21 dimensions company's manufacturing guidelines are met. 1.55 .061 z
10 ? 2011 semtech corp. www.semtech.com preliminary protection products rclamp0544t contact information semtech corporation protection products division 200 flynn road, camarillo, ca 93012 phone: (805)498-2111 fax (805)498-3804 tape and reel specification device orientation in tape pin 1 location user direction of feed pin 1 indicator 0544t yyww marking codes yyww = date code e p a t h t d i w ) x a m ( , bd1 de f k ) x a m ( p0 p2 p) x a m ( tw m m 8m m 2 . 4 m m 1 . 0 + 5 . 1 ) m m 0 . 0 - m m 5 . 0 5 0 . 0 0 1 . 0 5 7 . 1 m m 5 0 . 0 5 . 3 m m m m 4 . 2 1 . 0 0 . 4 m m 1 . 0 0 . 4 m m 5 0 . 0 0 . 2 m m m m 4 . 0 m m 0 . 8 m m 3 . 0 + m m 1 . 0 - ordering information r e b m u n t r a p r e p y t q l e e r e z i s l e e r t c t . t 4 4 5 0 p m a l c r 0 0 0 3 h c n i 7 0 a0 b0 k m m 5 0 . 0 - / + 1 2 . 1m m 5 0 . 0 - / + 1 2 . 2m m 5 0 . 0 - / + 6 6 . 0 railclamp and rclamp are marks of semtech corporation
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