Photocoupler s Features. 1. Current transfer ratio PC Anode mark. PC Internal connection diagram. PC PC PC PC PC PC 1. Notice The content of data sheet is subject to change without prior notice. In the absence PCXNNSZ0F Series contains an IRED optically Photocoupler. Dual-in-line package: LTV 1-channel type. LTV 2-channel type. LTV- 4-channel type. * Wide lead spacing package: LTVM: 1-channel type.

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PC817 (EL817)

Ado on November 14, at I hope it helps. For response time or frequency response data, check the datasheet. Shahid on August 7, at 1: The question is which one is the right testing method? Geert Van Droogenbroeck on November 18, at Mihai on July 15, at 8: Blumen on October 26, at 7: This IC is used to provide electrical isolation between two circuits, one part of the circuit is connected to the IR LED and the other to Photo-transistor.

Leave a Reply Cancel reply Your email address will not be published. There is no law governing all things. The nice thing about standards is that you have so many to choose from.

More details can be found at the PC datasheet which is available for download at the datadheet of this page. The ground line of the IR LED pin 2 and the ground line of the transistor pin 4 will not be connected together. Ootocoupler on March 6, at 2: 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.


How to test an optocoupler – AntiMath

I was referring to the junction resistance. Michael on January 21, at 3: Sarfaraz on November 8, at 9: Step 2 If the LED is good opocoupler 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.

I guess, it should work mostly the same as a normal triac. Please correct the pin numbers in image.

These information are very good indeed. Mihai on July 16, at 5: Mihai on March 18, at I like optocouplee way you explain things. Sunil on March 3, at 3: Hi, Both methods are correct.

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 adtasheet least greater than 1 megohm both ways, and this resistance should go down lower than ohms when voltage is applied to the LED, and should remain low even if the voltage is no longer present on the LED.

But when the Logic optocoupoer is made high, this high voltage should be a minimum of 1.

PC (EL) [] : Sunrom Electronics/Technologies

This will short the collector and emitter and hence the Logic Output voltage will become zero. Pls let me know. First of all thanks for sharing such an useful information. Siroos on October 14, at When Firefox stops working, you fire up Chrome. Mohamed on October 9, at 9: Viliam on September 7, at 1: Here is the web site. This is where the optlcoupler occurs. The LED is basically a diode, and it should not conduct both ways not get values on the meter both ways.


The complete working can also be understood form the GIF file above.

Nupra on March 18, at 6: 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. Arvind Vijaykumar on Dataxheet 1, at There pull-up resistor 1K acts as a load resistor.

Did you reffer to isolation resistance when you mention some phototransistors have high resistance? Some features may not work properly.

You helped me understand how to use a tester on a optocoupler Thanks.

The output will not get high as soon as the input logic is made low and vice versa. 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. Here I want to show you how to check if an optocoupler is working.

The alcohol never solved anything, but neither did water or milk. TL — Programmable Reference Voltage.

Connected to ground 3 Emitter Emitter pin of transistor. If i give the input of V DC what will be the response of this optocoupler….