Optoisolator Question...

[Jim Jose]

Hello NG,...

I am working on a project that I intend to use optoisolators as relays.
In my ECG catalog there is a quad optoisolator,... the ECG3221. The project
that I'm building will need 15 isolator circuits. Also, the voltage ratinmg
on the 3221 is 6 volts and I really could usesomething in the 9 to 12 volt
range. So...

1. Does anyone know if there's a 12 volt chip out there (4 circuits per
chip <quad> or better). If so, what is the part number and where would I
find the beast ?

2. What do these chips run pricewise ?

Thanks in advance ! Jim

 

[Bob Minchin]

Hello NG,...

I am working on a project that I intend to use optoisolators as relays.
In my ECG catalog there is a quad optoisolator,... the ECG3221. The project
that I'm building will need 15 isolator circuits. Also, the voltage ratinmg
on the 3221 is 6 volts and I really could usesomething in the 9 to 12 volt
range. So...

1. Does anyone know if there's a 12 volt chip out there (4 circuits per
chip <quad> or better). If so, what is the part number and where would I
find the beast ?

2. What do these chips run pricewise ?

Thanks in advance ! Jim

Hi Jim,

I can't find the part you talk about but I just can't imaging such a low voltage
Isolator.

I'm assuming your are talking about a transistor output type and the voltage of
interest is the Vceo. Am I right?

if so look at the Siemens ILQ 615-2 Vceo 30volts or the isocom ISQ201/ 202 or
203

these are readily available in the UK at an equivalent pprice of about 2$US.

Hope this helps or if I've got it wrong, come back with more detail and I'll try
to help.

Regards

Bob in UK