1/5 ita6v5b1 / ita10b1 ita18b1 / ita25b1 ? august 2001- ed: 2 bidirectional transil tm array for dataline protection so-8 differential data transmission lines protection : - rs-232 - rs-423 - rs-422 - rs-485 applications application specific discretes a.s.d. tm 1 2 3 4 i/o 1 i/o 2 i/o3 i/o4 gnd gnd 8 7 6 5 functional diagram n high surge capability transil array i pp = 40 a (8/20 m s) n peak pulse power : 300 w (8/20 m s) n up to 5 bidirectional transil functions n low clamping factor (v cl /v br )at high current level n low leakage current n esd protection up to 15kv features transil diode arrays provide high overvoltage protection by clamping action. their instantaneous response to transient overvoltages makes them particularly suited to protect voltage sensitive devices such as mos technology and low voltage supplied ics. the ita series allies high surge capability against energetic pulses with high voltage performance against esd. description iec 1000-4-2 : level 4 iec 1000-4-4 : level 4 iec 1000-4-5 : level 2 mil std 883c - method 3015-6 : class 3 (human body model) complies with the following standards :
ita6v5b1 / ita10b1 / ita18b1 / ita25b1 2/5 symbol parameter v rm stand-off voltage v br breakdown voltage v cl clamping voltage i rm leakage current @ v rm i pp peak pulse current a t voltage temperature coefficient c junction capacitance electrical characteristics (t amb = 25c) symbol parameter value unit p pp peak pulse power dissipation (8/20 m s) (see note 1) tj initial = t amb 300 w i pp peak pulse current (8/20 m s) (see note 1) tj initial = t amb 40 a i 2 t wire i 2 t value (see note 1) 0.6 a 2 s t stg t j storage temperature range maximum operating junction temperature -55to+150 125 c c t l maximum lead temperature for soldering during 10s 260 c absolute maximum ratings (t amb = 25c) 100 50 0 20 s t %i pp 8s pulse wave form 8/20 s types i rm @v rm v br @i r v cl @i pp v cl @i pp a tc max. min. 8/20 m s max. 8/20 m s max. max. note 2 note 2 note 2 note 3 m avvmavava10 -4 /c pf ita6v5b1 10 5 6.5 1 10 10 12 25 4 750 ita10b1 4 8 10 1 15101925 8570 ita18b1 4 1518 1 25102825 9350 ita25b1 4 2425 1 3310382512300 note 2 : between i/o pin and ground. note 3 : between two input pins at 0v bias ,f=1 mhz. preferred types in bold note 1 : for surges greater than the specified maximum value, the i/o will first present a short-circuit and after an open circuit caused by the wire melting.
ita6v5b1 / ita10b1 / ita18b1 /ita25b1 3/5 p(w) 1e-03 1e-02 1e-01 1e+00 1e+01 1e+02 1e+01 1e+02 1e+03 1e+04 t initial = 25 c j o t(ms)expo p p ita25b1 ita18b1 ita10b1 ita6v5b1 p fig. 1 : typical peak pulse power versus exponential pulse duration. i(a) 1e-02 1e-01 1e+00 1e+01 1e+00 1e+01 1e+02 1e+03 dc exponential waveform t(ms) fig. 3 : peak current i dc inducing open circuit of the wire for one input/output versus pulse duration (typical values). fig. 4 : junction capacitance versus reverse applied voltage for one input/output (typical values). fig. 2 : clamping voltage versus peak pulse current (exponential waveform 8/20 m s). fig. 5 : relative variation of leakage current versus junction temperature
ita6v5b1 / ita10b1 / ita18b1 / ita25b1 4/5 this monolithic transil array is based on 6 unidirectional transils with a common cathode and can be configurated to offer up to 5 bidirectional functions. this imposes a maximum differential voltage between 2 input pins (see opposite table). types maximum differential voltage between two input pins at 25c ita6v5b1 + / - 3.5 v ita10b1 + / - 5.0 v ita18b1 + / - 9.0 v ita25b1 + / - 12.5 v application information ita 25 b 1 rl integrated transil array v min br bidirectional packaging: rl = tape & reel = tube package: so-8 plastic order code typical application : rs232 junction. gnd cts rts tx rx
ita6v5b1 / ita10b1 / ita18b1 /ita25b1 5/5 type marking ita6v5b1 6v5b1 ita10b1 10b1 ita18b1 18b1 ita25b1 25b1 marking information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written ap- proval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics ? 2001 stmicroelectronics - printed in italy - all rights reserved. stmicroelectronics group of companies australia - brazil - china - finland - france - germany - hong kong - india - italy - japan - malaysia malta - morocco - singapore - spain - sweden - switzerland - united kingdom - u.s.a. http://www.st.com package mechanical data so-8 (plastic) ref. dimensions millimetres inches min. typ. max. min. typ. max. a 1.75 0.069 a1 0.1 0.25 0.004 0.010 a2 1.65 0.065 b 0.35 0.48 0.014 0.019 b1 0.19 0.25 0.007 0.010 c 0.50 0.020 c1 45 (typ) d 4.8 5.0 0.189 0.197 e 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 f 3.8 4.0 0.15 0.157 l 0.4 1.27 0.016 0.050 m 0.6 0.024 s 8 (max) packaging : preferred packaging is tape and reel. weight : 0.08g.
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