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((short description|Thin surface mount IC package))
((distinguish|text=[[Thin shrink small outline package]] (TSSOP)))
((Refimprove|date=July 2007))
[[Image:TSOP 32 (T1) BW.svg|thumb|An outline drawing of a Type I TSOP with 32 leads]]

'''Thin small outline package''' ('''TSOP''') is a type of [[surface mount]] [[Integrated circuit|IC]] package. They are very low-profile (about 1mm) and have tight lead spacing (as low as 0.5mm).

They are frequently used for RAM or Flash memory ICs due to their high pin count and small volume.  In some applications, they are being supplanted by [[ball grid array]] packages which can achieve even higher densities. The prime application for this technology is memory. [[static random access memory|SRAM]], [[flash memory]], [[FSRAM]] and [[E2PROM]] manufacturers find this package well suited to their end-use products. It answers the needs required by telecom, cellular, memory modules, [[PC Card|PC card]]s (PCMCIA cards), wireless, netbooks and countless other product applications.

TSOP is the smallest leaded form factor for flash memory.<ref>

((cite web|url=http://glacier.lbl.gov/~gtp/DOM/dataSheets/Intel_Packaging.pdf 
|title=Small Outline Package Guide 
|author=Intel 
|page=1-1 
|date=1999 
|access-date=December 17, 2021 
|url-status=dead 
|archive-url=https://web.archive.org/web/20170211223522/http://glacier.lbl.gov/~gtp/DOM/dataSheets/Intel_Packaging.pdf 
|archive-date=February 11, 2017 ))</ref>


== History ==

The TSOP package was developed to fit the reduced package height available in a [[PCMCIA PC Card]].<ref>
Texas Instruments.
[http://www.ti.com/lit/an/scza001a/scza001a.pdf "Recent Advancements in Bus-Interface Packaging and Processing"].
1997.
p. 2
</ref>

==Physical properties==
[[File:IBM PCMCIA Data-Fax Modem V.34 FRU 42H4326 - Atmel AT29C010A-9352.jpg|thumb|TSOP type I: [[Atmel]] AT29C010A]]
TSOPs are rectangular in shape and come in two varieties: Type I and Type II. Type I ICs have the pins on the shorter side and Type II have the pins on the longer side. The table below shows basic measurements for common TSOP packages.
<ref>[http://www.siliconfareast.com/tsop.htm SiliconFarEast: "TSOP - Thin Small Outline Package"]
</ref>

===Type I===
{| class=wikitable
!width=80|Part number
!width=50|Pins	
!width=80|Body width (mm)
!width=80|Body length (mm)
!width=80|Lead pitch (mm)
|-
|TSOP28	
|28	
|8.1
|11.8	
|0.55	
|-
|TSOP28/32	
|28/32	
|8
|18.4	
|0.5	
|-
|TSOP40	
|40	
|10
|18.4
|0.5
|-
|TSOP48	
|48	
|12
|18.4
|0.5
|-
|TSOP56
|56
|14
|18.4
|0.5
|}

===Type II===
{| class=wikitable
!width=80|Part number
!width=50|Pins	
!width=80|Body width (mm)
!width=80|Body length (mm)
!width=80|Lead pitch (mm)
|-
|TSOP6 (SOT457)<ref>((cite web | url=https://www.nexperia.com/packages/SOT457.html | title=Sc-74; Tsop6 (Sot457) ))</ref>	
|6	
|1.5
|2.9	
|0.95
|-
|TSOP20/24/26	
|20/24/26	
|7.6
|17.14	
|1.27	
|-
|TSOP24/28	
|24/28	
|10.16
|18.41	
|1.27	
|-
|TSOP32	
|32	
|10.16
|20.95	
|1.27
|-
|TSOP40/44	
|40/44	
|10.16
|18.42
|0.8	
|-
|TSOP50	
|50	
|10.16
|20.95	
|0.8	
|-
|TSOP54	
|54	
|10.16
|22.22	
|0.8	
|-
|TSOP66	
|66	
|10.16
|22.22	
|0.65
|}

== HTSOP ==
HTSOP (Heatsink TSOP) is a variant of TSOP with an [[Small outline integrated circuit#Exposed pad|exposed pad]] on the bottom side.((Citation needed|date=May 2023)) The pad is soldered to the [[Printed_circuit_board|PCB]] to transfer heat from the package to the PCB.

==Similar packages==
There are a variety of small form-factor IC carrier available other than TSOPs
* [[Small-outline integrated circuit]] (SOIC)
* Plastic small-outline package (PSOP)
* [[Shrink small-outline package]] (SSOP)
* [[Thin shrink small outline package|Thin-shrink small outline package]] (TSSOP)

==See also==
* [[Integrated circuit]]
* [[Chip carrier]] Chip packaging and package types list

==References==
((Reflist))

==External links==
((Commons Category|TSOP integrated circuit packages))
* [https://amkor.com/packaging/leadframe/tsop/ TSOP Package Information] from [[Amkor Technology]]

((Semiconductor packages))

[[Category:Chip carriers]]

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