< Back Ansberry Named VP Linear Systems Mar 17, 2023 Michael Ansberry - VP for Process Engineering. Ansberry Named VP NEWS RELEASE FOR INFORMATION CONTACT: Laura Madonna, Marketing Analyst Linear Integrated Systems, Inc. Phone: (510) 490-9160 Email: laura@linearsystems.com ANSBERRY NAMED VP FOR PROCESS ENGINEERING AT LINEAR INTEGRATED SYSTEMS FREMONT, CA – 06/27/2018. Linear Integrated Systems, Inc., is proud to announce and welcome Michael Ansberry as the company’s Vice President for Process Engineering. Ansberry will be responsible for all aspects of the company’s semiconductor fabrication operations. Ansberry joins Linear Integrated Systems (Linear Systems) from Lumileds, where he was Director of Operations. Lumileds is a lighting company that designs and manufactures LEDs for automotive, general and specialty lighting applications. Prior to Lumileds, he worked in process engineering at Sipex, Micro Power Systems and other Silicon Valley semiconductor companies. While Ansberry’s most recent experience is in managing large-scale LED production, he has extensive process engineering experience with the types of world-class semiconductors produced by Linear Systems. “Linear Systems makes the best parts in their class, and I’m very glad to be joining the team here,” Ansberry said. “Ultra-low-noise discrete components are critical for a wide range of applications and joining Linear Systems during this period of growth is exciting.” Linear Systems CEO Cindy L. Johnson said Ansberry's hiring is a key part of the company’s program to expand to meet a growing demand for its products. “Efforts to produce more precise and capable sensors are leading designers to incorporate our ultra-low-noise JFETs and other parts into their devices,” Linear Integrated Systems, Inc., is a full-service, privately-held, 30-year-old designer and manufacturer of small-signal discrete semiconductors. The Fremont, CA company was founded by John H. Hall, co-founder of Intersil and founder of Micro Power Systems. Linear Systems’ product line consists of: Ultra-Low-Noise N-Channel and P-Channel Dual and Single JFETs, High-Speed Lateral DMOS Switches, Bipolar Transistors, BIFET Amplifiers, Current-Regulating Diodes, Low-Leakage Diodes, MOSFETs, PhotoFETS, and Voltage Controlled Resistors. Data sheets can be downloaded at linearsystems.com .

MONOLITHIC DUAL AND SINGLE, PNP TRANSISTOR < Back LS3550 Series MONOLITHIC DUAL AND SINGLE, PNP TRANSISTOR The LS3550 Monolithic Dual and Single, PNP Transistor is a Higher Current Version of the MP350, MP351, and MP352 Series. It is ideal for Small Signal Transistor, Super Beta Amplifier & Switching Applications. It is available the in TO-71 6L RoHS, TO-78 6L RoHS, PDIP 8L ROHS and SOIC 8L RoHS package, as well as bare die. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: LS3550A TO-71 6L RoHS LS3550B TO-71 6L RoHS LS3550C TO-71 6L RoHS LS3550A TO-78 6L RoHS LS3550B TO-78 6L RoHS LS3550C TO-78 6L RoHS LS3550A PDIP 8L RoHS LS3550B PDIP 8L RoHS LS3550C PDIP 8L RoHS LS3550A SOIC 8L RoHS LS3550B SOIC 8L RoHS LS3550C SOIC 8L RoHS LS3550A Die LS3550B Die LS3550C Die Datasheet Spice Model Application Notes

< Back AEA Linear Systems Mar 17, 2023 AEA’s Ribbon Microphones & Linears’ JFETs AEA When John Kurlander sought to capture the vast array of sound for the Lord of the Rings movies, he turned to Wes Dooley and his ribbon microphones. And for years, when Wes needed ultra-low-noise semiconductors to build and amplify those microphones, he turned to Linear Systems, Inc. “Linear Systems has kept that tradition going of making parts that are competitive with the [discontinued Toshiba] SK170s and 389s,” Dooley said in a recent interview. “And that gives us the ability to make compact, high-performance audio products.” “We make the quietest ribbon mic in the world, the A440, and the higher SPL A840. Both of them use the [Linear Systems] LSK389, for the output drivers and their current supply,” Dooley said. Dooley's company, Audio Engineering Associates (AEA), also uses the LSK389 in front ends of its RPQ and RPQ 500 preamplifiers, which were designed for use with ribbon microphones. AEA's microphone business started with ribbon mics for classical music used as movie scores. “John Kurlander did all three Lord of the Rings using AEA mics on strings left and right almost as strong in the mix as the main orchestra mics,” Dooley said. “When you work with such people, one really learns to be of service.” AEA's customer list reads like a Who's Who of Grammy and Academy Award-winning recording engineers and artists. Among the many examples, sound engineer Michael Bishop, winner of eight Grammy awards, extensively uses AEA's A840 microphones and AEA preamps for his recordings. Shawn Murphy, who's worked on over 330 films and won an Academy award for Jurassic Park, also relies on AEA's preamps and microphones. One of the best parts of AEA's website is the long list of reviews and mentions by users . Dooley, a lifelong ribbon microphone enthusiast and developer, got into the business by repairing ribbon mics built by RCA during the golden age of radio. “We started servicing mics in '76 when RCA shut down making them,” he said. “Many of our favorite RCA designs were from the mid '30s, when a designer's foremost tool was listening to live music. Critical listening was the gold standard as acoustical measurements were cumbersome.” “We've adopted that approach, which is: musicality trumps metrics. The mic has to sound good to people in the music business,” Dooley said. “If it doesn't sound good, measurements don't matter. Once you have a mic that sounds good to people who have experienced ears, then measurements are very important, as they are the key to consistent production.” “So we first strive to make sure it sounds musical, and then we measure what it does,” Dooley said. “Because, as one of my mentors, Richard Heyser, said, if it measures well but doesn't sound right, then you're measuring the wrong things. Often you find you don't know what the right thing to measure is. Over time you discover what those metrics might be. Ultimately, it's a matter of how it sounds. Since we come from an acoustic music tradition, it's pretty simple: you put the mic in front of live music, and compare that live sound with the reproduction, to see how close it is.” Dooley told the story of working with legendary bluegrass fiddle player/violinist Richard Greene. Greene, along with his wife, a violinist with the LA Chamber Orchestra, recorded samples using over 20 microphones. “The next day, when they had 'fresh ears,' they listened to all the recordings and said the one made using our ribbon microphones was the best,” Dooley said. “And that's what we try for, for the musicians to experience that this is the closest they've ever heard to an actual performance.” Asked to comment for this article, Greene had high praise for Dooley and his microphones. “Silky, smooth, best violin sound I ever heard, Wes is amazing and his tech support and other free maintenance are over the top,” Greene wrote. “I will never have any use for any other mic on my violin. I have the AEA 440.” Dooley said this close interaction with artists drives how he builds microphones and preamps. “The whole thing,” he said, “is to build tools they need. That is the key to survival for a small business doing high-performance products.” The LSK389 “is a very good part for manufacturing,” Dooley said. AEA uses the “C” grade of the LSK389. “We started with the 'A' [grade], but then we realized it didn't make any difference for what we were doing,” he said. The LSK389 is graded by IDSS ; all three grades have the same ultra-low-noise characteristics. The Linear Systems LSK389 part used by AEA is an ultra-low-noise junction field effect transistor. Linear System Founder and CEO John H. Hall began working on a JFET similar to Toshiba's 2SK389 about the time that the Japanese company began to discontinue the device 10 years ago. “Toshiba kept its production process for the 389 secret, so we had to figure out on our own how to build something to the same specification, which was extremely difficult,” Hall said. Expertise brought to Linear Systems is based on processes and products Hall developed since 1962 at Amelco, Union Carbide, Intersil, and Micro Power Systems. Hall, a protégé of Silicon Valley legend Dr. Jean Hoerni, was the director of IC Development at Union Carbide, co-founder and vice president of R&D at Intersil, and founder/president of Micro Power Systems. Much of Linear Systems' current development work focuses on lower-noise JFETs. The production techniques Hall conceived to squeeze the last bit of noise out of the 389 led to development of another part, the LSK489. The LSK489 has less transconductance than the 389, and though this increases noise slightly, it makes the part easier to design into new circuits. “While the 389 is the perfect part for some users, such as Wes Dooley, who need the lowest noise levels in existence, we found that the high gate-to-drain capacitance of the 389 caused problems for some of our other customers,” Hall said. “Building a high transconductance part, such as the 389, formed part of the basis for providing ultra-low-noise levels, but the high input capacitance causes intermodulation distortion in some higher-frequency applications,” Hall said. “Since we had created some advanced processing techniques to make the 389, we decided to go back and look at creating a part with lower capacitance using the same processes.” Though Dooley's ribbon microphone and other devices take advantage of the 389's low noise level, other developers could tolerate a slightly higher noise level in a part that has much lower input capacitance due to a lower transconductance, Hall said. The lower capacitance and other features make the LSK489 a lower-noise, functional replacement for Linear Systems' LS840-series of JFETs, as well as the Siliconix U401-403 series. Dooley's precision ribbon microphones are perfect applications of the LSK389, Hall said. “Both ribbon microphones and JFETs are very difficult to design and build, but there's really no other way to achieve the level of performance needed than to do the work this way.” The circuit design work using the LSK389s was done for AEA by Fred Forssell of http://www.forsselltech.com . For more on Dooley's microphones, go to: http://www.ribbonmics.com Data sheets for the LSK389 and LSK489, the application notes for the LSK489, and a good paper on general JFET theory and use can be downloaded at: http://linearsystems.com .

LOG CONFORMANCE, MONOLITHIC DUAL, NPN TRANSISTOR < Back LS318 LOG CONFORMANCE, MONOLITHIC DUAL, NPN TRANSISTOR The LS318 Log Conformance, Monolithic Dual, NPN Transistor is a direct replacement for the Micro Power Systems MP318 Series. It is ideal for Log Conformance, Transistors Amplifier & Switching Applications. It is available the in TO-71 6L RoHS, TO-78 6L RoHS, PDIP 8L ROHS and SOIC 8L RoHS package, as well as bare die. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: LS318 TO-71 6L RoHS LS318 TO-78 6L RoHS LS318 PDIP 8L RoHS LS318 SOIC 8L RoHS LS318 Die Datasheet Spice Model Application Notes

LS3250 Single NPN High-Speed Switching Transistor < Back LS3250S - Single LS3250 Single NPN High-Speed Switching Transistor Previous Next

Welcome to our Literature page, where you can delve into a treasure trove of white papers and application notes covering our range of parts. Explore insights on ultra-low noise JFETs, DMOS, Current Regulating Diodes, JFET Switches, and low-leakage diodes, all designed to empower your understanding of our products. Literature Linear Systems offers an extensive library of technical resources tailored for analog circuit designers. Our collection includes detailed data books, product selection guides, cross-references, datasheets, original application notes, and white papers. This comprehensive literature serves as an invaluable reference for engineers, students, and hobbyists seeking to optimize their signal chain designs. By providing in-depth insights into small-signal discrete semiconductors and JFET applications, our materials empower you to create efficient and innovative analog circuits. Explore our resources to enhance your design process and stay at the forefront of analog technology. Datasheets Linear Systems provides detailed datasheets summarizing our components’ performance in ways to assist designers seeking to find the right part quickly. Our data sheets include typical/minimum/maximum performance data, along with an array of curves illustrating part performance so designers understand how these devices will contribute to overall system performance. Cross Reference Linear Systems continues to produce a wide range of JFET, DMOS and other standard products also previously manufactured by Siliconix, Fairchild and other companies. This cross reference provides buyers with a tool to quickly find replacements for discontinued standard products. Application Notes Linear Systems has a wide range of application notes written by top industry professionals to assist designers in making optimal use of our components in their products.

Learn about Linear Systems’ commitment to quality, including our ISO 9001 certified processes, rigorous testing, and focus on reliable, high-performance analog semiconductors. ISO Certificate RoHS/REACH TSCA POPs / PFAS Prop 65 CMRT EMRT

Navigate the Purchase Order Terms and Conditions page for our Fremont-based semiconductor manufacturer and gain insights into our business practices. Purchase Order Terms and Conditions A. The term "Company" as used herein shall mean Linear Integrated Systems, Inc. B. The term "Buyer" as used herein shall mean a party placing a purchase order for the Company products (the "Products"). C. THESE TERMS AND CONDITIONS OF SALE (THE "TERMS") ARE THE ONLY TERMS AND CONDITIONS OF THE AGREEMENT BETWEEN THE PARTIES. ANY AND ALL ADDITIONAL OR DIFFERENT TERMS, WHETHER IN A PURCHASE ORDER OR OTHER DOCUMENT GIVEN BEFORE OR AFTER THESE TERMS, ARE SPECIFICALLY REJECTED AND SHALL NOT BECOME PART OF THESE TERMS UNLESS AGREED TO IN WRITING BY THE COMPANY. 1. SCOPE These Terms apply to all quotations and offers made by and purchase orders accepted by the Company. Acceptance of Buyer's order is conditioned upon Buyer's acceptance of these Terms, whether by written acknowledgment, implication, or acceptance and payment of goods ordered. Any conflicting or additional terms provided by the Buyer are specifically rejected. Any changes in these Terms must be agreed upon in writing by a corporate officer of the Company. 2. PRICES, TAXES, AND DUTIES Prices are quoted in U.S. Dollars and may change without notice. Prices are firm and not subject to renegotiation, except at the Company's discretion. All prices exclude international duties, foreign taxes, and US federal, state, and local taxes. Buyer shall pay all applicable taxes and duties and indemnify the Company against any related expenses. Any price reductions based on volume discounts will be revoked if the Buyer reduces the number of parts purchased below discount levels. All price quotations are valid for 30 days, and parts must be delivered within 180 days from the quotation date. 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< Back Specialty Semiconductor - Linear Systems Linear Systems Oct 7, 2024 Linear Systems has designed, manufactured and distributed the best specialty semiconductors in their respective classes since 1987. Working in three Silicon Valley fabrication facilities, our components are world leaders in applications ranging from military underwater listening to the largest space telescope camera in existence. Linear Systems: A Leading Specialty Semiconductor Manufacturer Linear Systems is a well-known and highly respected company in the field of specialty semiconductors . With over 60 years of experience, they have established themselves as a leader in the industry, providing high-quality components for various electronic applications. Products Offered by Linear Systems As mentioned earlier, Linear Systems specializes in manufacturing a wide range of semiconductor products. Let's take a closer look at some of their popular offerings: JFET Amplifiers Junction Field-Effect Transistor (JFET) amplifiers are widely used for low-noise applications such as audio amplifiers and sensors. At Linear Systems, these amplifiers are designed and produced with precision, ensuring low noise, high gain, and excellent linearity. Switches Switching circuits are an essential component in many electronic systems. Linear Systems offers a variety of switches, including analog switches for audio signals and digital switching for data signals. Low Leakage Diodes Low leakage diodes play a crucial role in applications where maintaining low currents is critical. Linear Systems' diodes offer ultra-low leakage current, making them suitable for use in precision instrumentation and other sensitive circuitry. Current Regulating Diodes Current regulating diodes help maintain a constant output current even with fluctuations in input voltage or load resistance. These diodes are commonly used in power supplies and are available in various tolerances at Linear Systems. Voltage References Voltage references provide a stable reference voltage for precise measurements and circuit operation. Linear Systems offers a range of high-precision, low-drift voltage references to meet the demands of modern electronic systems. Quality Standards Linear Systems is committed to providing exceptional quality products to its customers. They adhere to strict industry standards and have earned certifications such as ISO9001:2015 and AS9100D for their dedication to quality management. Their products undergo rigorous testing and screening to ensure they meet the highest standards of reliability, performance, and durability. Customer Support Apart from their top-notch products, Linear Systems also prides itself on providing excellent customer support. Their team of knowledgeable engineers is always available to assist with any technical questions or concerns. Linear Systems also offers customization services to meet specific customer requirements, ensuring their products perfectly fit the needs of each application. Conclusion In conclusion, Linear Systems is a trusted and reliable supplier of high-quality semiconductor components. With a wide range of products, strict quality standards, and exceptional customer support, they are a go-to choice for many industries and applications. Whether it's switches, diodes, voltage references, or other specialized components, Linear Systems has you covered. Experience the difference in performance and reliability with Linear Systems today. So why wait? Choose Linear Systems for your next electronic project and see the difference in quality and performance. With their commitment to excellence, you can trust Linear Systems to deliver top-notch products and customer support every time. Upgrade your electronic systems with Linear Systems components and elevate your projects to new heights of precision and reliability. Trust in their expertise and experience the difference that Linear Systems brings to the world of semiconductors. Keep exploring their wide range of products and discover how they can enhance your electronic designs. With a track record of over 35 years in the industry, Linear Systems has established itself as a leader in semiconductor manufacturing, setting the standard for quality, reliability, and customer satisfaction. Experience it for yourself and join the thousands of satisfied customers worldwide who rely on Linear Systems for their electronic component needs. So don't settle for mediocre performance and reliability in your electronic systems, choose Linear Systems and elevate your projects to the next level. Trust in their commitment to excellence and experience the difference with Linear Systems today.

MONOLITHIC DUAL, NPN TRANSISTOR < Back IT124 MONOLITHIC DUAL, NPN TRANSISTOR The IT124 Monolithic Dual, NPN Transistor, Super Beta is a direct replacement for th Intersil IT124. It is ideal for Small Signal Transistor, Super Beta, Amplifier & Switching Applications. It is available the in TO-71 6L RoHS, TO-78 6L RoHS, PDIP 8L ROHS and SOIC 8L RoHS package, as well as bare die. Advanced screening options are available for our diverse product lineup, featuring JFETS, Bipolar transistors, MOSFETs, current regulators, and Diodes. Our special screening covers all the parameters listed in the standard datasheet, including comprehensive package pin-out. Connect with our experienced technical team to discuss your specific needs and tailor your requirements—email us at support@linearsystems.com or call (510) 490-9160. MOQ applies to these specialized services. Ordering Information Below are the options you have when ordering this part series: IT124 TO-71 6L RoHS IT124 TO-78 6L RoHS IT124 PDIP 8L RoHS IT124 SOIC 8L RoHS IT124 Die Datasheet Spice Model Application Notes