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SOP, TSOP, SSOP and TSSOP

Printed From: PCB Libraries Forum
Category: PCB Footprint Expert
Forum Name: Questions & Answers
Forum Description: issues and technical support
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=3548
Printed Date: 25 Sep 2025 at 4:23am


Topic: SOP, TSOP, SSOP and TSSOP
Posted By: m.elsayed
Subject: SOP, TSOP, SSOP and TSSOP
Date Posted: 24 Sep 2025 at 5:39pm
For this part"SST39VF3201C-70-4I-EKE-T" in this datasheet:

https://ww1.microchip.com/downloads/aemDocuments/documents/MPD/ProductDocuments/DataSheets/SST39VF3201C-SST39VF3202C-32-Mbit-x16-Multi-Purpose-Flash-Plus-20005020.pdf" rel="nofollow - https://ww1.microchip.com/downloads/aemDocuments/documents/MPD/ProductDocuments/DataSheets/SST39VF3201C-SST39VF3202C-32-Mbit-x16-Multi-Purpose-Flash-Plus-20005020.pdf"  

Has a package name of TSOP, however this package is not found in Footprint Expert. 

What should I do in this case.


Replies:
Posted By: Tom H
Date Posted: 24 Sep 2025 at 6:30pm
TSOP = Thin Small Outline Package 

TSOP was created by a the marketing department of a component manufacturer to refer to the low height profile of 1.60 mm. 

Since this was released years ago, the SOP package Height has changed to 1.20 and then to 1.00 and then to 0.80. 

Their marketing plan only worked for a couple years. 

TSOP is really just a metric pin pitch SOP. 

Manufacturers have referred to the SOP as:
  • TSOP - Thin Small Outline Package
  • SSOP - Shrink Small Outline Package (Fine Pitch)
  • TSSOP - Thin Shrink Small Outline Package (Thin and Fine Pitch)



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Posted By: m.elsayed
Date Posted: 24 Sep 2025 at 6:52pm
so is  this mean all these pacakges(TSOP-SSOP-TSSOP) should be created by SOP PCB tool package?


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