SDT400 dc input optocoupler the SDT400 consists of a phototransistor optically coupled to a light emitting diode. optical coupling between the input led an d output phototransistor allows for high isolation levels while maintaining low-level dc signal control capability. the SDT400 provides an optically isolated method of controlling many interface applications such as telecommunications, industrial control and instrumentation c ircuitry. description features applications options/suffixes schematic diagram maximum ratings approvals high input-to-output isolation package (5000 vrms) x low input power consumption x high stability x miniature 4 pin dip package x ctr (ctr:min 50% at if=5ma vce=5v) x registers, copiers, automatic vending machines x system appliances, measuring instruments x computer terminals, plcs x telecommunications, telephones x home appliances x digital logic inputs x microprocessor inputs x switching power supply, laser beam printers, etc. x surface mount option x -s tape and reel option x -tr parameter unit min typ max storage temperature c -55 125 operating temperatu re c -40 100 input forward current ma 50 input peak forward current a 1 reverse input control voltage v 6 total power dissipation mw 200 ul and c-ul approved, file #e201932 x rev 1.0 solid state optronics, inc. 1.888.377.4776 www.ssousa.com vde approved , license #40011227 x 1. anode 2. cathode 3. emitter 4. collector x -h 0.4" lead spacing option
SDT400 dc input optocoupler electrical characteristics - 25 parameter unit min typ max test conditions input specifications forward voltage v 1.2 1.4 if = 20ma reverse current p 10 vr = 4v a output specifications collector-emitter breakdown voltage v 60 ic = 10ua emitter-collector breakdown voltage v 6 ie = 10ua dark current p 0.1 vce = 20v a floating capacitance p 0.6 1 v = 0, f=1mhz f saturation voltage v 0.1 0.2 if = 20ma, ic = 1ma current transfer ratio % 50 600 if = 5ma, vce = 5v rise time p 4 ic = 2ma, vc e e e e e ee e e
SDT400 dc input optocoupler performance data rev 1.0 solid state optronics, inc. 1.888.377.4776 www.ssousa.com fig. 2 current transfer ratio vs. forward current forward current i f (ma) current transfer ratio ctr (%) fig. 3 collector power dissipation vs. ambient temperature ambient temperature ta (c) collector power dissipation pc (mw) fig. 5 forward current vs. ambient temperature ambient temperature ta (c) forward current i f (ma) fig. 6 forward current vs. forward voltage forward voltage v f (v) forward current if (ma) fig. 4 collector dark current vs. ambient temperature ambient temperature ta (c) collector dark current iceo (a) fig. 7 collector current vs. collector- emitter voltage collector-emitter voltage v ce (v) collector current ic (ma) fig. 1 collector-emitter saturation voltage vs. forward current forward current i f (ma) collector-emitter saturation voltage vce (v) fig. 8 response time vs. load resistance load resistance r l (k ohm) response rise time (us) fig. 9 response time vs. load resistance load resistance r l (k ohm) response rise time (us)
SDT400 dc input optocoupler mechanical dimensions (unit in: mm) 4 pin dual in-line package (SDT400) 4 pin surface mount device (SDT400-s) rev 1.0 solid state optronics, inc. 1.888.377.4776 www.ssousa.com 4 pin h type with 0.4" l ead spacing (SDT400-h)
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