Can you offer a part# as an example & link to a data sheet.

____________
Brian Guralnick


----- Original Message ----- 
From: "Steve Baldwin" <[EMAIL PROTECTED]>
To: "Protel EDA Forum" <[EMAIL PROTECTED]>
Sent: Tuesday, March 05, 2002 4:25 PM
Subject: [PEDA] TSSOP Power Pad


| Does anyone have pointers to footprint guidelines for Power Pad 
| parts, particularly TSSOP (28 pin in this case).
| 
| If I put a pad down the same size as the powerpad and screen 
| solder onto it, I would expect the part to sit up on the meniscus 
| when the solder melts and I'd get poor/missed joints at the pins.
| I would have expected to have a pad the same size as the power 
| pad but to only screen a tiny bit of solder on to it.
| This is all conjecture and I didn't find anything useful with Google or 
| my usual PCB links.
| 
| Anyone know more about these things ?
| 
| Steve.
| 
| ======================================================
| Steve Baldwin                Electronic Product Design
| TLA Microsystems Ltd         Microcontroller Specialists
| PO Box 15-680, New Lynn      http://www.tla.co.nz
| Auckland, New Zealand        ph  +64 9 820-2221
| email: [EMAIL PROTECTED]      fax +64 9 820-1929
| ======================================================
| 
| 

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