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CNY/ TELEFUNKEN Semiconductors. Rev. A2, Dec 1 (9). Multichannel Optocoupler with Phototransistor Output. Description. The CNY and. CNYH includes 2 isolator channels. • CNYH includes 4 isolator channels. • Isolation test voltage VISO = VRMS. • Test class 25//21 DIN 40 Features. • CNYH includes 2 isolator channels. • CNYH includes 4 isolator channels. • Isolation test voltage VISO = VRMS.

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Jan 20, 2. Tales from 80s Tech: You have got how to calculate the LED series resistor correct.

But the transistor in the opto will be more or less full on with a LED current of 15mA. Go for a Datasbeet current equal to 15mA. Jan 20, 1. You can use figure 2. And you will no problem at all. We see that the Saturation voltage, collector emitter will be at typical.

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TEMIC – datasheet pdf

Jan 22, 6. Jan 24, Have you done any calculations on LEDs and transistors before? From the datasheet at page two.

It should be easy now to get a picture of the resistor wattage. This will give you the LED voltage drop for a given current.

Your name or email address: And that is also important. But use a emitter resistor in the range of 4. Optocoupler fails after month.

I would not have used a trimmer.

CNY74-2 Datasheet

No, create an account now. Do you already have an account? You May Also Like: Jan 22, Take a look once more on figure 5. If you feel for it use two resistors in series to get close to the value.

The voltage drop in the transistor will be typical. I used this datasheet http: Jan 23, Jan 22, 5. May 11, 5, 1, If the opto is connected to some 5 volt logic gate or controller.

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cny74 2 datasheet pdf ibm

Jan 22, 7. So the current in a 4.

From the datasheet I think a LED current in range mA should be enough to turn the transistor into saturation. I will use a trimmer instead a resistor. Find the voltage drop at 15 mA and take this into your calculations please.

You will have values well inside the spec of the opto. Quote of the day. OptoCoupler Posted by mpuvdd in forum: Ok, looking the figure 4, at 15mA there is about 1.

Datwsheet using a 4.