Editing Pin compatibility (section)

== Pin-to-pin compatibility ==

''Pin-to-pin compatible'' devices share an assignment of functions to pins, but may have differing electrical characteristics (supply [[voltage]]s, or [[Electronic oscillator|oscillator]] frequencies) or thermal characteristics ([[thermal design power|TDP]]s, [[Thermal profile#Soldering of electronic products|reflow curve]]s, or  [[Operating temperature#Ranges|temperature tolerances]]). As a result, their use in a system may require that portions of the system, such as its power delivery subsystem, be adapted to fit the new component.

A common example of pin-to-pin compatible devices which may not be electrically compatible are the [[7400 series]] integrated circuits. The 7400 series devices have been produced on a number of different manufacturing processes, but have retained the same [[pinout]]s throughout. For example, all 7405 devices provide six [[NOT gate]]s (or inverters) but may have incompatible supply voltage tolerances.

* 7405 – Standard [[Transistor Transistor Logic|TTL]], 4.75–5.25 V.
* 74C05 – [[CMOS]], 4–15 V.
* 74LV05 – Low-voltage CMOS, 2.0–5.5 V.

In other cases, particularly with [[computer]]s, devices may be pin-to-pin compatible but made otherwise incompatible as a result of [[market segmentation]]. For example, [[Skylake (microarchitecture)#Server processors|Intel Skylake]] desktop-class [[Intel Core#Skylake microarchitecture|Core]] and [[Xeon E3 v5|Xeon E3v5]] processors both use the [[LGA 1151]] socket, but [[motherboard]]s using C230-series [[chipset]]s will only be compatible with Xeon-branded processors, and will not work with Core-branded processors.<ref name="intel-ark-i36100-compatibilities">{{cite web | url=http://ark.intel.com/products/90729/Intel-Core-i3-6100-Processor-3M-Cache-3_70-GHz#@compatibility | title=Intel Core i3-6100 Processor (3M Cache, 3.70 GHz) Specifications | publisher=Intel Corporation | accessdate=4 March 2016}}</ref><ref name="intel-brief-e31200v5">{{cite web | url=http://www.intel.co.uk/content/dam/www/public/us/en/documents/product-briefs/xeon-e3-1200v5-brief.pdf | title=Intel Xeon Processor E3-1200 V5 Product Family Brief | publisher=Intel Corporation | accessdate=4 March 2016 | pages=4}}</ref>