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protection products 1 www.semtech.com preliminary protection products - railclamp ? ? ? ? ? rclamp0522pa RCLAMP0524PA ultra low capacitance tvs arrays description features circuit diagram - rclamp0522pa circuit diagram - RCLAMP0524PA revision 3/8/2010 railclamp ? tvs arrays are ultra low capacitance esd protection devices 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 overvolt- age caused by esd (electrostatic discharge), cde (cable discharge events), and eft (electrical fast transients). the rclamp ? 0522pa and rclamp ? 0524pa have 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. the rclamp0522pa is designed to protect two lines, while the RCLAMP0524PA will protect four lines. the rclamp0522pa is in a 6-pin slp1610p4 package. it measures 1.6 x 1.0 with a nominal height of 0.58mm. the RCLAMP0524PA is in a 10-pin slp2510p8 package. it measures 2.5 x 1.0 with a nominal height of 0.58mm. the leads are spaced at a pitch of 0.5mm and are fin- ished with lead-free nipdau. they are designed for easy pcb layout by allowing the traces to run straight through the device. the combination of small size, low capaci- tance, and high level of esd protection makes them a flexible solution for applications such as hdmi, displayport tm , mddi, and esata interfaces. applications mechanical characteristics ? high definition multi-media interface (hdmi) ? digital visual interface (dvi) ? displayport tm interface ? mddi ports ? pci express ? esata interfaces ? esd protection for high-speed data lines to iec 61000-4-2 (esd) 17kv (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 two or 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 ? slp1610p4 6-pin package (1.6 x 1.0 x 0.58mm) ? slp2510p8 10-pin package (2.5 x 1.0 x 0.58mm) ? pb-free, halogen free, rohs/weee compliant ? lead pitch: 0.5mm ? lead finish: nipdau ? marking: marking code ? packaging: tape and reel 4-line protection 2-line protection pin 1 pin 2 3, 4 pin 1 pin 2 pin 4 pin 5 3, 8
protection products 2 www.semtech.com preliminary protection products - railclamp ? ? ? ? ? rclamp0522pa RCLAMP0524PA ultra low capacitance tvs arrays rclamp0522p slp1610p4 pin configuration (top view) pin identification and configuration n i pn o i t a c i f i t n e d i 2 - 1s e n i l t u p n i 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 ( 4 - 3d n u o r g rclamp0524p slp2510p8 pin configuration (top view) 12 45 3 8 6 7 9 10 n i pn o i t a c i f i t n e d i 5 , 4 , 2 , 1s e n i l t u p n i 0 1 , 9 , 7 , 6 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 ( 8 , 3d n u o r g pin 1 pin 2 pin 4 pin 5 3, 8 12 65 4 3 pin 1 pin 2 3, 4 ordering information railclamp and rclamp are marks of semtech corporation. r e b m u n t r a p r e b m u n s e n i l f o r e p y t q l e e r l e e r e z i s t c t a p 2 2 5 0 p m a l c r 20 0 0 3 h c n i 7 t c t a p 4 2 5 0 p m a l c r 40 0 0 3 h c n i 7 circuit diagram circuit diagram
3 ? 2010 semtech corp. www.semtech.com preliminary protection products rclamp0522pa RCLAMP0524PA absolute maximum rating electrical characteristics (t=25 o 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 u o r g o t n i p o / i y n a5v 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 u o r g o t n i p o / i y n a 6v 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 = d n u o r g o t n i p o / i y n a 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 = d n u o r g o t n i p o / i y n a 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 = s n i p o / i n e e w t e b 0 3 . 04 . 0f p 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 u o r g o t n i p o / i y n a 8 . 0f p 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 5 1s 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 7 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
4 ? 2010 semtech corp. www.semtech.com preliminary protection products rclamp0522pa RCLAMP0524PA 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 (between any i/o and ground) pulse waveform 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 1000 pulse duration - tp (us) peak pulse power - p pp (kw) normalized capacitance vs. reverse voltage 0 5 10 15 20 25 30 35 40 0123456 peak pulse current - i pp (a) clamping voltage -v c (v) waveform parameters: tr = 8s td = 20s line to gnd line to line 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 1.1 1.2 1.3 1.4 1.5 012345 reverse voltage - v r (v) c j (v r ) / c j (v r =0) f = 1 mhz insertion loss s21 - i/o to gnd 1 2 3 start . 030 mhz 3 stop 000 . 000 000 mhz ch1 s21 log 6 db / ref 0 db 1: -0.086 db 900 mhz 2: -0.0336 db 1.8 ghz 3: -0.126 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
5 ? 2010 semtech corp. www.semtech.com preliminary protection products rclamp0522pa RCLAMP0524PA typical characteristics (con?t) insertion loss s21 - i/o to i/o 1 2 3 start . 030 mhz 3 stop 000 . 000 000 mhz ch1 s21 log 6 db / ref 0 db 1: -0.076 db 900 mhz 2: -0.062 db 1.8 ghz 3: -0.1087 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
6 ? 2010 semtech corp. www.semtech.com preliminary protection products rclamp0522pa RCLAMP0524PA figure 1. flow through layout using figure 1. flow through layout using figure 1. flow through layout using figure 1. flow through layout using figure 1. flow through layout using r r r r r clam clam clam clam clam p052 p052 p052 p052 p052 4p 4p 4p 4p 4p a a a a a hdmi connector 3 2 1 6 5 4 9 8 7 12 11 10 hdmi connector 3 2 1 6 5 4 9 8 7 12 11 10 gnd gnd gnd gnd 1 1 design recommendations for hdmi protection adding external esd protection to hdmi ports can be challenging. first, esd protection devices have an inherent junction capacitance. furthermore, adding even a small amount of capacitance will cause the impedance of the differential pair to drop. second, large packages and land pattern requirements cause discontinuities that adversely affect signal integrity. the RCLAMP0524PA and rclamp0522pa are specifically designed for protection of high-speed interfaces such as hdmi. they present <0.4pf capacitance between the pairs while being rated to handle >8kv esd contact discharges (>15kv air discharge) as outlined in iec 61000-4-2. each device is in a leadless slp package that is less than 1.1mm wide. they are designed such that the traces flow straight through the device. the narrow package and flow-through design reduces discontinuities and minimizes impact on signal integrity. this becomes even more critical as signal speeds increase. pin configuration figure 1 is an example of how to route the high speed differential traces through the RCLAMP0524PA. the solid line represents the pcb trace. the pcb traces are used to connect the pin pairs for each line (pin 1 to pin 10, pin 2 to pin 9, pin 4 to pin 7, pin 5 to pin 6). for example, line 1 enters at pin 1 and exits at pin 10 and the pcb trace connects pin 1 and 10 together. this is true for lines connected at pins 2, 4, and 5 also. ground is connected at pins 3 and 8. one large ground pad should be used in lieu of two separate pads. the same layout rules apply for the rclamp0522pa. 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 requirements of 100 ohms 15% without any pcb board modification. figure 3 shows a typical impedance test result for a tdr risetime of 200ps using a semtech evaluation board with 100 ohm traces throughout. measure- ments were taken using a tdr method as outlined in the hdmi compliance test specification (cts). in each applications information
7 ? 2010 semtech corp. www.semtech.com preliminary protection products rclamp0522pa RCLAMP0524PA figure 2 - tdr measurement with 200ps risetime using semtech evaluation board note: measurements were taken on slp hdmi eval rev c board that has 100 differential traces impedance throughout (no trace compensation). applications information case, the device meets the hdmi cts requirement of 100 ohm 15% with plenty of margin. figure 3 shows a typical hdmi 1.3 eye pattern at 1080p resolution. as shown there are no violations of the eye pattern with RCLAMP0524PA in the circuit. the RCLAMP0524PA may also be used to protect the remaining lines (i2c, cec, and hot plug). figure 4 shows the complete protection solution. layout guidelines for optimum esd protection good circuit board layout is critical not only for signal integrity, but also for effective suppression of esd in- duced transients. for optimum esd protection, the following guidelines are recommended: z place the device as close to the connector as pos- sible. this practice restricts esd coupling into adjacent traces and reduces parasitic inductance. z the esd transient return path to ground should be kept as short as possible. whenever possible, use multiple micro vias connected directly from the device ground pad to the ground plane. z avoid running critical signals near board edges. x-axis 1.79 (nsec) y-axis 98.3 (ohm) figure 3 - typical hdmi 1.3 eye pattern (1080p) with RCLAMP0524PA protecting mddi ports with rclamp0524p and rclamp0522p the small package size and low capacitance of the rclamp0522pa and RCLAMP0524PA make them ideal for high-speed lines in portable applications. one such application is the protection of mddi ports in cellular phones. mddi is a serial data interface operating at 480mb/s per line pair. the lines are scalable for increased speed and display resolution. a mddi port protection example is shown in figure 5. the RCLAMP0524PA is used to protect two differential line pairs while an rclamp0522pa is used to protect the mddi strobe lines. note that devices are used on both the main board and lcd side of the mddi port. devices on the main board are needed to protect the mddi controller in the baseband processor and devices on the lcd board to protect mddi controller in lcd module. a single line tvs such as the uclamp0501p is used to protect the mddi power line. the protection devices should be placed close to the connector of each board. traces are routed directly through each device, minimizing parasitic inductance. connections to the ground plane should be made with multiple micro vias when possible.
8 ? 2010 semtech corp. www.semtech.com preliminary protection products rclamp0522pa RCLAMP0524PA applications information figure 4. hdmi protection figure 4. hdmi protection figure 4. hdmi protection figure 4. hdmi protection figure 4. hdmi protection 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) RCLAMP0524PA (3 each) figure 5. mddi port protection figure 5. mddi port protection figure 5. mddi port protection figure 5. mddi port protection figure 5. mddi port protection mddi link controller mddi link controller host mddi_data0+ mddi_data0- mddi_data1+ mddi_data1- gnd gnd mddi_stb- mddi_stb+ rclamp0522p rclamp0522p gnd gnd uclamp0501p host pwr host gnd uclamp0501p rclamp0524p rclamp0524p RCLAMP0524PA RCLAMP0524PA rclamp0522pa rclamp0522pa
9 ? 2010 semtech corp. www.semtech.com preliminary protection products rclamp0522pa RCLAMP0524PA applications information spice model rclamp0522pa spice model s r e t e m a r a p e c i p s a p 2 2 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
10 ? 2010 semtech corp. www.semtech.com preliminary protection products rclamp0522pa RCLAMP0524PA applications information spice model RCLAMP0524PA spice model s r e t e m a r a p e c i p s a p 4 2 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
11 ? 2010 semtech corp. www.semtech.com preliminary protection products rclamp0522pa RCLAMP0524PA outline drawing - so-8 land pattern - slp1610p4 outline drawing - slp1610p4 lxn e/2 2x r0.075 b1 .014 .016 .018 0.35 0.40 0.45 3 places d/2 b1xn bxn bbb c a b a1 r0.125 e1 e1 .039 bsc 1.00 bsc inches .020 bsc b .006 bbb aaa n l e d .012 dim a1 a2 a min 0.00 .020 0.25 0.15 .010 0.20 .008 0.43 0.30 .004 .003 4 .015 .063 .017 0.08 0.10 4 0.38 1.60 0.50 bsc millimeters max 0.05 0.65 dimensions min 0.00 nom (.005) .023 .001 max .002 .026 nom 0.50 0.03 (0.13) 0.58 controlling dimensions are in millimeters (angles in degrees). notes: 1. 1.00 .039 e 1.70 1.50 .067 .059 0.90 1.10 .043 .035 e d a aaa c pin 1 indicator (laser mark) b c seating plane 1 e 2 n a2 a bbb c a b (c) z y1 (.061) (1.55) 1. controlling dimensions are in millimeters (angles in degrees). p1 p1 .039 1.00 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 (0.87) .008 .027 .007 .020 (.034) 0.20 0.68 0.50 0.19 dimensions company's manufacturing guidelines are met. 1.55 .061 z x1 .016 0.40 x1 x (y1) p y g
12 ? 2010 semtech corp. www.semtech.com preliminary protection products rclamp0522pa RCLAMP0524PA outline drawing - so-8 land pattern - slp2510p8 outline drawing - slp2510p8 inches .020 bsc b .006 bbb aaa n l e d .012 dim a1 a2 a min 0.00 .020 0.25 0.15 .010 0.20 .008 0.425 0.30 .004 .003 8 .015 .098 .017 0.08 0.10 8 0.38 2.50 0.50 bsc millimeters max 0.05 0.65 dimensions min 0.00 nom (.005) .023 .001 max .002 .026 nom 0.50 0.03 (0.13) 0.58 controlling dimensions are in millimeters (angles in degrees). notes: 1. a2 a1 a bbb c a b bxn bbb c a b d/2 b1xn lxn e/2 r0.125 2x r0.075 b1 .014 .016 .018 0.35 0.40 0.45 7 places 1.00 .039 e 2.60 2.40 .102 .094 0.90 1.10 .043 .035 e d a aaa c pin 1 indicator (laser mark) b c seating plane 1 e 2 n controlling dimensions are in millimeters (angles in degrees). 1. z (.061) (1.55) y1 (y1) y p1 x p1 .039 1.00 x1 .016 0.40 x1 p g (c) 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 (0.875) .008 .027 .008 .020 (.034) 0.20 0.675 0.50 0.20 dimensions company's manufacturing guidelines are met. 1.55 .061 z
13 ? 2010 semtech corp. www.semtech.com preliminary protection products rclamp0522pa RCLAMP0524PA tape and reel specification device orientation in tape pin 1 location user direction of feed rclamp0522pa RCLAMP0524PA marking codes 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 - contact information semtech corporation protection products division 200 flynn road, camarillo, ca 93012 phone: (805)498-2111 fax (805)498-3804 r e b m u n t r a p0 a0 b0 k a p 2 2 5 0 p m a l c rm m 5 0 . 0 - / + 0 3 . 1m m 5 0 . 0 - / + 5 7 . 1m m 5 0 . 0 - / + 0 7 . 0 a p 4 2 5 0 p m a l c rm m 5 0 . 0 - / + 3 2 . 1m m 5 0 . 0 - / + 0 7 . 2m m 5 0 . 0 - / + 0 7 . 0 pin 1 indicator 0524p yyww pin 1 indicator 0522p yyww yyww = date code

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