Editing Signetics (section)

==Notable devices==
Signetics introduced a number of innovative analog and digital integrated circuits which became [[de facto standard]] products widely used in mass-produced electronics. Freely-distributed application notes published by Signetics were key in educating students and practicing engineers in the usefulness and simplicity of their ICs. Some designs remain iconic and are still used today in basic electronics lab exercises.<ref name="Cimbala">{{cite web |last1=Cimbala |first1=John M. |title=The 555 Timer IC |url=https://www.me.psu.edu/cimbala/me345/Lectures/The_555_Timer_IC.pdf |website=ME345 |publisher=Penn State University |access-date=2022-02-27}}</ref> 
* The Signetics [[555 timer IC]] was probably their best-known new product. Still widely manufactured and used today in original and updated versions, the basic design appears in many simple electronic timers, oscillators, and other basic electronic systems.
* The Signetics NE565 was a pioneering implementation of powerful [[phase-locked loop]] technology in an IC, which along with the [[voltage-controlled oscillator]] (VCO) NE566, helped advance digital communications.
* The [[Signetics 2650]] was an [[8-bit]] [[microprocessor]] introduced in the early 1970s and used in several video games and game systems (e.g. the [[Arcadia 2001]]).<ref name="arcadia">{{cite web|url=http://www.old-computers.com/museum/computer.asp?st=2&c=835|title=Emerson Arcadia 2001|publisher=old-computers.com|access-date=2013-02-08}}</ref> and in the early [[telesoftware]] broadcasts.
* The [[Signetics 8X300]] was a [[bipolar junction transistor|bipolar]] microprocessor developed by [[Scientific Micro Systems]] but manufactured by Signetics starting in 1976. It was mostly used as a controller chip due to its limited instruction set and its high speed.
* The Signetics 2513<ref>[http://www.applefritter.com/files/signetics2513.pdf 2513 text display ROM]</ref><ref>{{Cite web | url=https://www.datasheetarchive.com/pdf/download.php?id=5065adad5e4757ac90073038091de3931e7380&type=M&term=2513 | title=Datasheet Archive 2513 datasheet download }}</ref> was a [[character generator]] chip used in the [[TV Typewriter]],<ref>{{cite journal | url=https://deramp.com/swtpc.com/TV_Typewriter/page_06.pdf| last = Lancaster | first = Don | title = TV Typewriter | journal =[[Radio-Electronics]] | volume = 44 | issue = 9 | pages =43–52 | publisher = Gernsback Publications | location = New York | date = September 1973}}</ref> [[Apple I]], and early versions of the [[Apple II]], as well as [[Atari, Inc.|Atari]]'s earliest arcade games.
* The Signetics 82S100 FPLA (Field Programmable Logic Array) was the first commercially successful user [[programmable logic device]], the forerunner of the modern [[FPGA]].<ref name = "Signetics 82S100">{{cite journal | title = FPLA's give quick custom logic| journal = EDN | volume = 20 | issue = 13 | pages = 61 | publisher = Cahners Publishing | location = Boston, MA | date = July 20, 1975 }} Press release on Signetics 82S100 and 82S101 field programmable logic arrays. Sixteen inputs pins, 8 output pins and 48 product terms. NiCr fuse link programming.</ref><ref>{{cite journal |last1=Birkner |first1=John |title=How the FPGA came to be, Part 2 |journal=Electronic Engineering Journal |date=8 December 2021 |url=https://www.eejournal.com/article/how-the-fpga-came-to-be-part-2/ |access-date=10 April 2022}}</ref>
* [[NE5532]], a widely used audio [[op amp]], now generic and produced by many other manufacturers. According to one 1993 article, NE5532 was "the standard audio op amp to which others are compared".<ref>{{cite book|title=Electronic Musician|year=1993|publisher=Polyphony Publishing Company|page=51}}</ref>
* [[NE5517]], an [[operational transconductance amplifier]], still in production by NXP Semiconductors and also generically made by other manufacturers; it is given as a classic OTA example in a number of textbooks.<ref name="Rybin2011">{{cite book|author=Yu. K. Rybin|title=Electronic Devices for Analog Signal Processing|year=2011|publisher=Springer Science & Business Media|isbn=978-94-007-2205-7|page=21}}</ref><ref name="Haidekker2013">{{cite book|author=Mark A. Haidekker|title=Linear Feedback Controls: The Essentials|year=2013|publisher=Newnes|isbn=978-0-12-405513-1|page=227}}</ref>