ct micro rev 3 proprietary & confidential page 1 feb, 2015 ct357 series dc input 4-pin mini-flat phototransistor optocouple r package outline schematic features ? ?? ? high isolation 3750 v rms ? ?? ? multiple ctr selection available ? ?? ? dc input with transistor output ? ?? ? creepage distance 5mm ? ?? ? operating temperature range - 55 c to 110 c ? ?? ? green package ? ?? ? regulatory approvals ul - ul1577 (e364000) vde - en60747-5-5(vde0884-5) cqc ? gb4943.1, gb8898 iec60065, iec60950 description these series of general purpose optocoupler consists of a photo transistor optically coupled to a gallium arsenide infrared-emitting diode in a 4-lea d mini-flat package. applications ? ?? ? dc-dc converters ? ?? ? programmable controllers ? ?? ? telecommunication equipment ? ?? ? hybrid substrates that require high density mounting
ct micro rev 3 proprietary & confidential page 2 feb, 2015 ct357 series dc input 4-pin mini-flat phototransistor optocouple r absolute maximum rating at 25 o c symbol parameters ratings units notes v iso isolation voltage 3750 v rms t opr operating temperature -55 ~ +110 o c t stg storage temperature -55 ~ +150 o c t sol soldering temperature 260 o c p tot total power dissipation 200 mw emitter i f forward current 50 ma i f(trans) peak transient current ( 1 s p.w,300pps) 1 a v r reverse voltage 6 v p d power dissipation 70 mw detector p c power dissipation 150 mw b vceo collector-emitter breakdown voltage 80 v b veco emitter-collector breakdown voltage 6 v i c collector current 50 ma
ct micro rev 3 proprietary & confidential page 3 feb, 2015 ct357 series dc input 4-pin mini-flat phototransistor optocouple r electrical characteristics t a = 25c (unless otherwise specified) emitter characteristics symbol parameters test conditions min typ max units notes v f forward voltage i f =10ma - 1.24 1.4 v i r reverse current v r = 6v - - 5 a c in input capacitance f= 1mhz - 10 250 pf detector characteristics symbol parameters test conditions min typ max units notes b vceo collector-emitter breakdown i c = 100 a 80 - - v b veco emitter-collector breakdown i e = 1ma 7 - - v i ceo collector-emitter dark current v ce = 20v, i f =0ma - - 100 na transfer characteristics symbol parameters test conditions min typ max units notes ctr current transfer ratio ct357 i f = 5ma, v ce = 5v 50 - 600 % CT357A 80 - 160 ct357b 130 - 260 ct357c 200 - 400 ct357d 300 - 600 v ce(sat) collector-emitter saturation voltage i f = 20ma, i c = 1ma - 0.06 0.2 v r io isolation resistance v io = 500v dc 5x10 10 - - ? c io isolation capacitance f= 1mhz - 0.5 1 pf switching characteristics symbol parameters test conditions min typ max units notes t r rise time i c = 2ma, v ce = 2v, r l = 100 ? - 6 18 s t f fall time - 8 18
ct micro rev 3 proprietary & confidential page 4 feb, 2015 ct357 series dc input 4-pin mini-flat phototransistor optocouple r typical characteristic curves
ct micro rev 3 proprietary & confidential page 5 feb, 2015 ct357 series dc input 4-pin mini-flat phototransistor optocouple r typical characteristic curves
ct micro rev 3 proprietary & confidential page 6 feb, 2015 ct357 series dc input 4-pin mini-flat phototransistor optocouple r package dimension dimensions in mm unless otherwise stated recommended solder mask dimensions in mm unless otherwise stated
ct micro rev 3 proprietary & confidential page 7 feb, 2015 ct357 series dc input 4-pin mini-flat phototransistor optocouple r marking information note: ct : denotes ?ct micro? 357 : product number r : ctr rank v : vde option y : fiscal year ww : work week k : manufacturing code ordering information ct357x(v)(z) x = part no. (x=a,b,c,d, none) v = vde option (v or none) z = tape and reel option (t1 or t2) option description quantity t1 surface mount lead forming ? with option 1 taping 30 00 units/reel t2 surface mount lead forming ? with option 2 taping 30 00 units/reel ct 357r vywwk
ct micro rev 3 proprietary & confidential page 8 feb, 2015 ct357 series dc input 4-pin mini-flat phototransistor optocouple r carrier tape specifications dimensions in mm unless otherwise stated option t1 option t2
ct micro rev 3 proprietary & confidential page 9 feb, 2015 ct357 series dc input 4-pin mini-flat phototransistor optocouple r reflow profile profile feature pb-free assembly profile temperature min. (tsmin) 150c temperature max. (tsmax) 200c time (ts) from (tsmin to tsmax) 60-120 seconds ramp-up rate (t l to t p ) 3c/second max. liquidous temperature (t l ) 217c time (t l ) maintained above (t l ) 60 ? 150 seconds peak body package temperature 260c +0c / -5c time (t p ) within 5c of 260c 30 seconds ramp-down rate (t p to t l ) 6c/second max time 25c to peak temperature 8 minutes max.
ct micro rev 3 proprietary & confidential page 10 feb, 2015 ct357 series dc input 4-pin mini-flat phototransistor optocouple r disclaimer ct micro reserves the right to make changes without further notice to any products herein to improve reliability, function or design. ct micro does not assume any liability arising out of the application or use of any produc t or circuit described herein; neither does it convey any license under its patent rights, nor the rights of others. ___________________________________________________ ___________________________________ discoloration might occur on the package surface af ter soldering, reflow or long term use. this does not impact the product performa nce nor the product reliability. ct micro are not authorized for use as critical com ponents in life support devices or systems without express written approval of ct micr o international corporation. 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain li fe, or (c) whose failure to perform when properly used in accordance with instruction for use provided in the labelling, can be reasonably expected to result in significant injury to the user. 2. a critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.
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