On Sun, 2010-11-28 at 08:01 +1300, Brent Brown wrote:

> =20
> > *2 Conformal coating or washing of the components is not acceptable
> > because they are not hermetically sealed.
> >=20
> That indeed would be bad. However the data sheet I looked at covers a
> whole range of parts, seems to depend on exactly where you look... (keep
> reading till you find the specs you prefer?!)  eg:
>=20
> http://www.farnell.com/datasheets/45562.pdf
>=20
> >From page 12 of above doc:
>=20
> MHz Chip Type Notice (Soldering and Mounting) for Automotive
> CSTCC/CSTCR/CSTCE_V/CSTCE_G/CSTCV/CSACV Series
>=20
> 2. Wash
> (1) Cleaning Solvents
> HCFC, Isopropanol, Tap water, Demineralized water,
> Cleanthrough750H, Pine alpha 100S, Techno care FRW
>=20
> 4. Others
> Conformal coating of the component IS acceptable.
> However, the resin material, curing temperature, and
> other process conditions should be evaluated to
> confirm that stable electrical characteristics are
> maintained.
>=20
> The assumption I made was that the CSTCE8M00G55Z is a CSTCE_G series
> device so has the above specs. I could the be wrong. The low number of
> boards (20) I've made so far with the parts have been washed and then
> conformal coated without any problems.
>=20
> Brent.
>=20


www.murata.com/products/catalog/pdf/p17e.pdf

CSTCE 8M00 G 55Z=20

  All of the CSTCC, CSTCE, and CSTCW parts are marked with a
"*2" which points to the objectionable foot-note.


--=20
James D Baker
jdbaker@mchsi.com


--=20
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