[sdiy] MIDI optocoupler query

Richie Burnett rburnett at richieburnett.co.uk
Fri Jan 5 21:28:53 CET 2018


It's the 5kv creepage distance that makes the package large.

Sent from my Xperia SP on O2

---- Tom Wiltshire wrote ----

>Hi Tim,
>
>The 6N138 offers 5kV isolation, 300% CNR and 20mA current. Putting those parameters in as minimums (combined with SMD packages) gives this list:
>
>http://uk.farnell.com/webapp/wcs/stores/servlet/Search?catalogId=15001&langId=44&storeId=10151&categoryId=700000021001&pf=113080807,111978345,111978347,111978348,111978349
>
>The HCPL 0700 or 0701 look likely candidates. Indeed, these share a data sheet with the classic 6N138/139 MIDI opts:
>
>http://www.farnell.com/datasheets/1266261.pdf
>
>HTH,
>Tom
>
>==================
>       Electric Druid
>Synth & Stompbox DIY
>==================
>
>> On 5 Jan 2018, at 19:59, Tim Ressel <timr at circuitabbey.com> wrote:
>> 
>> Yeah, that "SMT" package is just a DIP with the legs modded for reflowing. I was hoping for a part that is smaller than a dip. 
>> --tr
>> 
>> On 1/5/2018 11:53 AM, Pete Hartman wrote:
>>> Olivier of Mutable Instruments says he has better success with a 6N137 than a 6N138.
>>> 
>>> Turns out the '137 has an SMT version
>>> 
>>> https://www.mouser.com/productdetail/lite-on/6n137s?qs=sGAEpiMZZMtd3yBnp8bAgJVeHfvx%252b1RWwJnXPJ0hWKA%3D
>>> 
>>> And that was just one of several options.
>>> 
>>> Pete
>>> 
>>> 
>>> 
>>> On Fri, Jan 5, 2018 at 1:37 PM, Tim Ressel <timr at circuitabbey.com> wrote:
>>> Thanks but this is a production design and can't use obsolete parts.
>>> 
>>> --tr
>>> 
>>> 
>>> 
>>> On 1/5/2018 11:35 AM, Jean-Pierre Desrochers wrote:
>>> Best is Sharp PC900 SMT:
>>> Obsolete but still available through eBay
>>> https://www.ebay.com/itm/20-PIECE-LOT-PC900V0YSZX-SHARP-OPTOISO-5KV-OPEN-COL
>>> LECTOR-6DIP-/302575333531?roken=cUgayN&soutkn=9QY7wa
>>> 
>>> JP
>>> 
>>> -----Message d'origine-----
>>> De : Synth-diy [mailto:synth-diy-bounces at synth-diy.org] De la part de Tim
>>> Ressel
>>> Envoyé : 5 janvier 2018 13:55
>>> À : SYNTH DIY
>>> Objet : [sdiy] MIDI optocoupler query
>>> 
>>> Hi,
>>> 
>>> Is there a small SMT opto that is known to work as a MIDI receiver? The
>>> 6N138 is on the portly side and I am out of room on my board.
>>> 
>>> Thanks!
>>> 
>>> 
>>> -- 
>>> --Tim Ressel
>>> Circuit Abbey
>>> timr at circuitabbey.com
>>> 
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>> 
>> -- 
>> --Tim Ressel
>> Circuit Abbey
>> 
>> timr at circuitabbey.com
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>
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