Isolated UART communication

Hi All,

I want suggestions about making high-speed opto-isolated UART
communications between
1. Microcoltroller to Microcontroller at TTL Levels.
2. RS232

Rohan wrote:
> Hi All,
>
> I want suggestions about making high-speed opto-isolated UART
> communications between
> 1. Microcoltroller to Microcontroller at TTL Levels.
> 2. RS232
>

Go to Analog Devices Web pages <http://www.analog.com/>,
and click 'isolators'.

--

Tauno Voipio
tauno voipio (at) iki fi

On May 3, 11:51 pm, Tauno Voipio <tauno.voi...@INVALIDiki.fi> wrote:
> Rohan wrote:
> > Hi All,
>
> > I want suggestions about making high-speed opto-isolated UART
> > communications between
> > 1. Microcoltroller to Microcontroller at TTL Levels.
> > 2. RS232
>
> Go to Analog Devices Web pages <http://www.analog.com/>,
> and click 'isolators'.
>
> --
>
> Tauno Voipio
> tauno voipio (at) iki fi

Hi,
Thanks.
I forgot to add that I need a cheap working solution for mass
production. Something with normal optocouplers.
is it possible.
Thanks,
Rohan

On 3 May 2007 11:40:41 -0700, Rohan <> wrote:

>Hi All,
>
>I want suggestions about making high-speed opto-isolated UART
>communications between

What is high speed ? 110/9600/115k2/12Mbit/s ?
What isolation requirements 0.5 kV, 2.5 kV, 110 kV or 400 kV ?

>1. Microcoltroller to Microcontroller at TTL Levels.

Standard 20 mA current loop or +/-10 mA bipolar current loop.

>2. RS232

At least RS-232C did not specify speeds above 9k6, so going to 20 mA
current loop would be sufficient.

Paul

Rohan wrote:

> Hi,
> Thanks.
> I forgot to add that I need a cheap working solution for mass
> production. Something with normal optocouplers.
> is it possible.
> Thanks,
> Rohan

You still have not said how fast you need to go!

We use H11L1 optos (Schmitt, ~1us, 1.6mA ), as a good trade off between
speed and price.

-jg

"Jim Granville" <> wrote in message
news:463a57a6$...
> Rohan wrote:
>
> > Hi,
> > Thanks.
> > I forgot to add that I need a cheap working solution for mass
> > production. Something with normal optocouplers.
> > is it possible.
> > Thanks,
> > Rohan
>
> You still have not said how fast you need to go!

In his first line:

> Hi All,
>
> Any suggestions about making high-speed (16k baud) opto-isolated UART

Meindert

Meindert Sprang wrote:

> "Jim Granville" <> wrote in message
> news:463a57a6$...
>> Rohan wrote:
>>
>> > Hi,
>> > Thanks.
>> > I forgot to add that I need a cheap working solution for mass
>> > production. Something with normal optocouplers.
>> > is it possible.
>> > Thanks,
>> > Rohan
>>
>> You still have not said how fast you need to go!
>
> In his first line:
>
>> Hi All,
>>
>> Any suggestions about making high-speed (16k baud) opto-isolated UART
>
> Meindert

I don't know where you got the parenthesised portion of the text from but it
was not in the original post of this thread nor any subsequent one from the
OP.

Original message was:-

> Hi All,
>
> I want suggestions about making high-speed opto-isolated UART
> communications between
> 1. Microcoltroller to Microcontroller at TTL Levels.
> 2. RS232


--
************************************************** ******************
Paul E. Bennett ....................<email://>
Forth based HIDECS Consultancy .....<http://www.amleth.demon.co.uk/>
Mob: +44 (0)7811-639972
Tel: +44 (0)1235-811095
Going Forth Safely ..... EBA. www.electric-boat-association.org.uk..
************************************************** ******************

"Paul E. Bennett" wrote:
>
.... snip ...
>
> I don't know where you got the parenthesised portion of the text
> from but it was not in the original post of this thread nor any
> subsequent one from the OP.

Second post in the thread, which included:

> Any suggestions about making high-speed (16k baud) opto-isolated
> UART communications between

It was posted 2 min after the first post.

--
<http://www.cs.auckland.ac.nz/~pgut001/pubs/vista_cost.txt>
<http://www.securityfocus.com/columnists/423>
<http://www.aaxnet.com/editor/edit043.html>
<http://kadaitcha.cx/vista/dogsbreakfast/index.html>
cbfalconer at maineline dot net



--
Posted via a free Usenet account from http://www.teranews.com

CBFalconer wrote:

> "Paul E. Bennett" wrote:
>>
> ... snip ...
>>
>> I don't know where you got the parenthesised portion of the text
>> from but it was not in the original post of this thread nor any
>> subsequent one from the OP.
>
> Second post in the thread, which included:
>
>> Any suggestions about making high-speed (16k baud) opto-isolated
>> UART communications between
>
> It was posted 2 min after the first post.

My newsreader had organised that into a different thread so it was unseen
when I queried the parenthesis portion. Sorry.

--
************************************************** ******************
Paul E. Bennett ....................<email://>
Forth based HIDECS Consultancy .....<http://www.amleth.demon.co.uk/>
Mob: +44 (0)7811-639972
Tel: +44 (0)1235-811095
Going Forth Safely ..... EBA. www.electric-boat-association.org.uk..
************************************************** ******************

Meindert Sprang wrote:
> "Jim Granville" <> wrote in message
> news:463a57a6$...
>
>>Rohan wrote:
>>
>>
>>>Hi,
>>>Thanks.
>>>I forgot to add that I need a cheap working solution for mass
>>>production. Something with normal optocouplers.
>>>is it possible.
>>>Thanks,
>>>Rohan
>>
>>You still have not said how fast you need to go!
>
>
> In his first line:

Nope, Not on what I was reading; but no matter, the advice I gave
was still sound.

-jg