> From:   Richard.Prosser@POWERWARE.COM[SMTP:Richard.Prosser@POWERWARE.COM]
> Sent:         Monday, October 06, 2003 11:44 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      [EE]: Digital Signal Isolators.

> I'm trying to locate a digital isolator with a creepage distance of 14.4mm
> or greater (spec requirement). Routing out the board under the device will
> not help as the device pins must be separated by at least this distance.
> Data rate is 19k2 so speed is not too much of an issue and a power supply
> is available on both sides - at least to 10mA or so. I'm not fussy as to
> actual type of isolation, optical, magnetic etc.

> If an opto is around that meets the requirement then this would be easiest.

Try the Optek OPI 1264A, B, C (the suffix A, B, C indicates the current
transfer ratio, 2.5, 5.0, 10). Isolation voltage is 10KV. The drawing in the
Digi-Key catalog shows an opaque cylindrical housing with leads exiting
longitudinally from each end. See their part number 365-1031-ND, (also
-1032- and -1033- for the B and C versions). Price < $3 in ones.

John Power

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