elektronische bauelemente SZMD24C 1 0 0w, 24 v transient voltage suppressors for esd protection 01-june-2002 rev. a page 1 of 2 http://www.secosgmbh.com/ any changes of specification will not be informed individually. top view a l c b d g h j f k e 1 2 3 1 2 3 features z sot-23 package for surface mount application z protects 24 v components z protects two unidirectional line or one bi-direction line z provides electrically is olated protection applications z cellular handsets and accessories z portable devices z industrial controls z set -top box z servers, notebook, and desktop pc marking code kd q absolute ratings (tamb = 25c ) rating symbol value units iec 61000-4-2 (esd) air contact contact discharge 15 8 kv kv esd voltage per human body model 16 kv total power dissipation on fr-5 board (note 1) @ t a =25 p d 150 m/w junction and storage temperature range t j , t stg -55 ~ +150 c lead solder temperature ? maximum (10 second duration) t l 260 c stresses exceeding maximum ratings may damage the device. maximu m rating are stress ratings only. functional operation above th e recommended operating conditions is not implied. extended exposure to st resses above the recommended operating conditions may affect device reliability. 1. fr-5 = 1.0*0.75*0.62 in. electrical characteristics (ratings at 25c ambient temperature unless otherwise specified. v f = 0.9v at i f = 10ma) v rwm (v) i r (ua) @ v rwm v br (v) @ i t (note 2) i t (ma) v c (v) @ max i pp (note 3) i pp (a) (note 3) p pk (w)* c (pf) (note 4) device max max min ma max max max typ szmd 24 c 24 0.1 28 5.0 43 2 .0 100 18 other voltages available upon request. 2. v br is measured with a pulse test current i t at an ambient temperature of 25 3. surge current waveform per figure 3. 4. measured at 1mhz 0v. rohs compliant product a suffix of ?-c? specifies halogen & lead-free sot-23 millimete r millimete r ref. min. max. ref. min. max. a 2.80 3.00 g 0.10 ref. b 2.25 2.55 h 0.55 ref. c 1.20 1.40 j 0.08 0.15 d 0.90 1.15 k 0.5 ref. e 1.80 2.00 l 0.95 typ. f 0.30 0.50 3 2 1
elektronische bauelemente SZMD24C 1 0 0w, 24 v transient voltage suppressors for esd protection 01-june-2002 rev. a page 2 of 2 http://www.secosgmbh.com/ any changes of specification will not be informed individually. ratings and characteristics curves a pplications information device connection options the szmd series is designed to protect one bi-directional or two uni-directional data or l/o lines operating at 24 volts.connection options are as follows: ? bidirectional:pin 1 is connected to the data line and pin 2 is connected to ground (since the device lls symmetrical,these conmtions may be re- ver3ed).for best results,the ground connection should be made directly to a ground plane on the board.the path length should be kept as short as possible to minimize parasitic inductance-pin 3 is not connected. ? unidirectional:data lines are connected to pin1 and pin2.pin 3 is connected to ground.for best results,this pin should be connected directly to a ground plane on the board.the path lengh should be kept as short as possible to minimize parasitic inductance. 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 sl99.01 for more detailed information): ? place the tvs near the input terminals or connec- tors to restrict transient coupling. ? minimize the path length between the tvs and the protected line. ? minimize all conductive loops including power and ground loops. ? the esd transient return path toground should be kept as short as possible. ? never run critical signals near board edges ? use ground planes whenever possib|e. 0 10 20 30 40 50 60 70 80 90 100 110 0 5 10 15 20 25 30 time (us) percent of i pp e -t td = i pp /2 wave form paramete rs: tr = 8 s td = 20 s pulse waveform 0 10 20 30 40 50 60 70 80 90 10 0 11 0 0 25 50 75 100 125 150 ambient tempe r ature - t a ( o c) % of rated power or i pp power derating curve clamping voltage vs. peak pulse current 0 10 20 30 40 50 60 0 1 2 3 peak pulse current - i pp (a) clamping voltage - v c (v) waveform parameter s tr = 8s td = 20 s
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