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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Dtaasheet on November 8, at 9: Evis on November 12, at 7: Mihai on July 19, at 3: I have two circuits. Sunil on March 3, at 3: Step 2 If the LED is good then we should check the phototransistor, you could measure it with the ohmmeter just daasheet 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.

Pls let me know. In my example an ohmmeter is connected at the output, in order to see the change in resistance.

817a datasheet pdf

Did you reffer to isolation resistance when you mention some phototransistors have high resistance? Mihai on March 6, at 2: I guess, it should work mostly the same as a normal triac.


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

Muhammad Akhlaq on May 30, at 9: The purpose of an optocoupler is to transfer signals from one circuit to another yet keep them galvanically isolated. Here I want to show you how to check if an optocoupler is working.

How can i test them? Mihai on October 28, at Sanu sebastian on August 19, at Viliam on September 7, at 1: Mihai on November 20, at 1: Wade on February 5, at 9: How the optocoupler Type SFH acts when the positive line is open. If the input is at 2V DC, then the output resistance should be around — ohms.

Leave a Reply Cancel dataeheet Your email address will not be published. Please correct the pin numbers in image. The nice thing about standards is that you have so many to choose from.

LTVA datasheet & applicatoin notes – Datasheet Archive

It depends on the datashert 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.


Mihai on June 10, at Thank you for the information. Hi, Both methods are correct.

For response time or frequency response data, check the datasheet. I hope it helps. Blumen on October 26, at 7: Geert Van Droogenbroeck on November 18, at Learn how your comment data is processed.

How to test an optocoupler – AntiMath

There is no law governing all things. Siroos on October 14, at These information are very good indeed. Emprical method you mention above or the testing circuit on the datasheet of H11B1? 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.

If you get a value either way or no value at all, then certainly there is a problem with the LED, and you should find another optocoupler. You helped me understand how to use a tester on a optocoupler Thanks. This site uses Akismet to reduce spam.