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Lite-On LTVA: available from 21 distributors. Explore Optoelectronics on Octopart: the fastest source for datasheets, pricing, specs and availability. Photocoupler. Product Data Sheet. LTV/ / . (M, S, S-TA, S-TA1, S-TP). Series. Spec No.:DS Notice The content of data sheet is subject to change without prior notice. In the absence of confirmation by device specification sheets, SHARP takes no.

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How the optocoupler Type SFH acts when the positive line is open. I have two circuits.

Shahid on August 7, at 1: If the LED is good then we should check the phototransistor, you could measure it with the ohmmeter just like the LED between pins 3 and 4 the emitter and collectorand you should get a high resistance value both ways if the phototransistor is good.

Hi, First of all thanks for sharing such an useful information.

This site uses Akismet to reduce spam. An optocoupler or optoisolatoris a device that contains 817q light-emitting diode LED and a photosensor photodetector, such as a photoresistor, a photodiode, a phototransistor, …etc.

For response time or frequency response data, check the datasheet. In my example an ohmmeter is connected at the output, in order to see the change in resistance.

Please correct the pin numbers in image. Hi, Both methods are correct.

817a datasheet pdf

Better check the datasheet for a test circuit. The alcohol never solved anything, but neither did water or milk.


These information are very good indeed. Thanks for the easy to follow explanation of how datashee rest an optocoupler. Step 2 If the LED is good then we should check the phototransistor, you could measure it with the ohmmeter just like the LED between pins 3 and 4 the emitter and collectorand you should get a high resistance value both ways dataxheet the phototransistor is good.

For the triac pins 4 and 6with no voltage applied to the LED pins 1, 2check with an ohmmeter the resistance between pins 4 and 6, it should be high open circuit or at least greater than 1 megohm both ways, and this resistance should go down lower than datasehet when voltage is applied to the LED, and should remain low even if the voltage is no longer present on the LED.

Blumen on October 26, at 7: Hi, maybe a stupid question: Mihai on November 20, at 1: Mihai on October 28, at Thx and best regards, Geert.

Lite-On LTVA – PDF Datasheet – DIP Optocouplers In Stock |

Mihai on July 15, at 8: Thank you for the information… and i have one more clarifications. The purpose of ddatasheet optocoupler is to transfer signals from one circuit to another yet keep them galvanically isolated. You have JavaScript disabled or are viewing the site on a device that does no support JavaScript. I like the way you explain things.

Datashwet Akhlaq on May 30, at 9: If i give the input of V DC what will be the response of this optocoupler….

Sanu sebastian on August 19, at I use analog ohmmeter with 2 internal batteries, 3V to turn on LED pins 1 and 2and digital V-metar on diode tester mode on transistor side.


Viliam on September 7, at 1: Mihai on July 19, at 3: But what i want to mention is there is a different testing circuit on the datasheet of H11B1.

I was referring to the junction resistance.

LTVA datasheet & applicatoin notes – Datasheet Archive

Hi, The MOC, is a phototriac coupler, meaning that instead of the phototransistor, it has a phototriac, which is basically a triac with the gate driven by the LED. Sarfaraz on November 8, at 9: Your email address will not be published.

There is no law governing all things. Mihai on August 27, at It depends on the 2nd circuit you are supplying the voltage on collector of the optocoupler, optocoupler will never transfer the voltages of circuit1 to circuit2, it decreases resistance between your supplied voltages at collector and emitter on the input of circuit2.

Any help would be apreciated. Mihai on July 16, at 5: I only have a digital multi meter. I appriciate… I tried that emprical method for H11B1 optocoupler. Did you reffer to isolation resistance when you mention some phototransistors have high resistance? Siroos on October 14, at Michael on January 21, at 3: I guess, it should work mostly the same as a normal triac. I hope it helps.

Mihai on March 18, at