TECHNET Archives

February 2005

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
"Dehoyos, Ramon" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Dehoyos, Ramon
Date:
Fri, 18 Feb 2005 13:13:20 -0500
Content-Type:
text/plain
Parts/Attachments:
text/plain (135 lines)
        This seems to be a case for standardization. Is anyone from IPC or part vendor industry reading?
        Ramon


	

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Cheryl Johnson
Sent: Friday, February 18, 2005 11:55 AM
To: [log in to unmask]
Subject: Re: [TN] Flipped transistor?


And let the one who ...
has NEVER had a SOT23 layed out wrong (with the 3 pins, every possible order
is used by every different vendor - even among "same" part numbers...)
...cast the first stone...

Sincerely,
-----------------------------------
Cheryl Johnson, C.I.D.+
Manager
ExcelStor US Office, Engineering Services
Email: [log in to unmask]
Tel: (303) 684-7291
Fax: (303) 684-7268
Mobile: (303) 809-5815
-----------------------------------


-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Matthew Lamkin
Sent: Friday, February 18, 2005 9:32 AM
To: [log in to unmask]
Subject: Re: [TN] Flipped transistor?


It may not be what it was intended to be designed for, but once the
component is soldered in what difference does it make?
Fair do's if it's going to be used on the next deep space probe or something
really intensive, but for a general use board that is just going to sit
there what harm can come of it?

Vibration will barely make any difference either way up.

So the component is upside down, but for an SOT23 the gap is not great when
the legs are bent back.

Don't worry, life's full of too many hassles.
If it works, don't fix it.

Just out it down to being an Aussie part. ;-)

maybe best to raise an ECN though.lol

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Bissonnette,
Jean-Francois
Sent: Friday, February 18, 2005 3:25 PM
To: [log in to unmask]
Subject: [TN] Flipped transistor?


Here is a first for me!

Before I go ruffling some feathers I would like to have others opinion.
I've just been informed of a modification on a boards that requires to
install a SOT23 NPN transistor to be fliped on its back in order to be
soldered.  The poor leads are then bent backward to contact with the board's
lands of some other component.

Engineering did not raise a flag on that yet... I'm worried to say the least
because I'm convinced that this is a NO NO!

Anyone has seen that in the past?

Thanks!

Jean-François

***** CONFIDENTIALITY NOTE *****
The content contained in this e-mail transmission is legally privileged and
confidential information intended only for the use of the individual or
entity named herein. If the reader of this transmission is not the intended
recipient, you are hereby notified that any dissemination, distribution, or
copying of this transmission is strictly prohibited.

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 1.8e
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2