PCB Libraries Forum : SOT353 with Different Pin 1 Orientation https://www.PCBLibraries.com/forum/ Sun, 05 Apr 2026 17:04:07 +0000 Sun, 20 Feb 2022 12:21:01 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=3061 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[SOT353 with Different Pin 1 Orientation : OK, I will pull the part from...]]> https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12218.html#12218 Author: ChrisChris
Subject: 3061
Posted: 20 Feb 2022 at 12:21pm

OK, I will pull the part from POD on Monday when it's ready.

Thanks, Tom!


]]> Sun, 20 Feb 2022 12:21:01 +0000 https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12218.html#12218 <![CDATA[SOT353 with Different Pin 1 Orientation : SOT-353-180D is my name, to differentiate...]]> https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12217.html#12217 Author: ChrisChris
Subject: 3061
Posted: 20 Feb 2022 at 12:19pm

SOT-353-180D is my name, to differentiate the two. Anyway, the datasheet indicates case labeling will have a pin 1 marker, so assembly will be confused if I don't crate a custom part for this.


So how should I handle this?

Thanks,
Chris

]]> Sun, 20 Feb 2022 12:19:59 +0000 https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12217.html#12217 <![CDATA[SOT353 with Different Pin 1 Orientation : The Diodes part number seriesMMBD4448HCQW...]]> https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12216.html#12216 Author: Tom H
Subject: 3061
Posted: 20 Feb 2022 at 12:19pm

The Diodes part number series MMBD4448HCQW on POD will be updated by Monday morning with the new Case Code - SOT353-180D 

Thank you for reporting this issue. 

]]> Sun, 20 Feb 2022 12:19:20 +0000 https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12216.html#12216 <![CDATA[SOT353 with Different Pin 1 Orientation : I guess Diodes, Inc. has multiple...]]> https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12215.html#12215 Author: Tom H
Subject: 3061
Posted: 20 Feb 2022 at 12:09pm

I guess Diodes, Inc. has multiple pin configurations for their SOT-353. Very unusual for a top-rated component manufacturer. 

Diodes does not call the Case Code for the MMBD4448HCQW part number SOT353-180D. 

Nor does it actually print the pin assignments in the MMBD4448HCQW datasheet - 
MMBD4448HCQW-7-F Diodes Incorporated | Discrete Semiconductor Products | DigiKey



 
Here's another part number: 


 
]]> Sun, 20 Feb 2022 12:09:20 +0000 https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12215.html#12215 <![CDATA[SOT353 with Different Pin 1 Orientation : FYI... I checked and you have...]]> https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12213.html#12213 Author: ChrisChris
Subject: 3061
Posted: 20 Feb 2022 at 11:25am

FYI... I checked and you have this part available for free in POD but it is wrong. 

Pin 1 should be as I've indicated above in SOT353-180D. 

The part number is Diodes Inc. MMBD4448HCQW.

]]> Sun, 20 Feb 2022 11:25:18 +0000 https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12213.html#12213 <![CDATA[SOT353 with Different Pin 1 Orientation : Hello,I have a somewhat odd example...]]> https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12212.html#12212 Author: ChrisChris
Subject: 3061
Posted: 20 Feb 2022 at 11:22am

Hello,

I have a somewhat odd example of an SOT353 package with 2 different pin 1 cases as follows:



I created the SOT353 with the Calculator and then cloned the part and renamed it SOT353-180D. I now need to customize this version by moving the pin 1 chamfer to the upper right without renumbering the pads. How would you recommend doing this? It does not seem like I can open a part in FP Designer that was created using the calculator. Is my only option to create this part from scratch in FP Designer?

Thanks,
Chris
]]> Sun, 20 Feb 2022 11:22:24 +0000 https://www.PCBLibraries.com/forum/sot353-with-different-pin-1-orientation_topic3061_post12212.html#12212