Re: Future: 0603 versus 0402 parts

On Sun, 25 Mar 2007 13:17:29 -0800, the renowned John Larkin
<jjlarkin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

On 25 Mar 2007 11:49:06 -0700, "Frank Raffaeli"
<SNIPrf_man_frTHIS@xxxxxxxxx> wrote:

On Mar 25, 12:28 pm, Joerg <notthisjoerg...@xxxxxxxxxxxxxxxxxxxxx>
wrote:
vasile wrote:
On Mar 14, 12:01 am, Joerg <notthisjoerg...@xxxxxxxxxxxxxxxxxxxxx>
wrote:

Ok, have to decide whether to default to 0603 or 0402 for resistors and
stuff on a new design. Wow, this time I am not size constrained.

Both are OK for common design. Using 0402 means you haven't too many
BGAs onboard.

No BGA. I don't like them. It's mostly TSSOP and, where I can get away
with it, SO.

Else you need 0201. 0402 could be manually soldered. I've solder
desolder many
of them in small prototypes series ( 10 to 20 pcs of PCB)

I suggest either 0402 with at least 0603 pad size for test points or
0603 without test points.

I am leaning towards 0603.

--
Regards, Joerg

http://www.analogconsultants.com

I've been using 0603 as my 'default' for years, but I'm seeing others,
especially high-volume manufacture, defaulting to 0402 more and more.

For very high volume consumer products designed in China, 0603 is
still preferred. for cellular handsets, 0201 and 0402 only ... some
even smaller.

Frank

SMT Magazine did a recent, mediocre article on embedded passives. It
would be nice if all our sloppy-tolerance resistors were screened on
the bottom of the board. Is anybody doing this? Caps would be even
better, but screened caps are too wimpy to be bypasses.

John

Eh? You don't want the potential problems. Stay with the SMT
resistors, IMHO. You're not manufacturing 75-cent TV remotes.

.

Relevant Pages

  • Re: Future: 0603 versus 0402 parts
    ... stuff on a new design. ... BGAs onboard. ... would be nice if all our sloppy-tolerance resistors were screened on ... but screened caps are too wimpy to be bypasses. ...
    (sci.electronics.design)
  • Re: Future: 0603 versus 0402 parts
    ... stuff on a new design. ... BGAs onboard. ... It's mostly TSSOP and, ... but screened caps are too wimpy to be bypasses. ...
    (sci.electronics.design)
  • Re: Future: 0603 versus 0402 parts
    ... stuff on a new design. ... BGAs onboard. ... would be nice if all our sloppy-tolerance resistors were screened on ... but screened caps are too wimpy to be bypasses. ...
    (sci.electronics.design)
  • Re: Future: 0603 versus 0402 parts
    ... On Mar 25, 12:28 pm, Joerg ... stuff on a new design. ... BGAs onboard. ... defaulting to 0402 more and more. ...
    (sci.electronics.design)
  • Re: Future: 0603 versus 0402 parts
    ... stuff on a new design. ... but screened caps are too wimpy to be bypasses. ... The really nice thing was active laser trim where you could trim the response of an RF circuit to perfection. ...
    (sci.electronics.design)