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MONOLITHIC DUAL, P-CHANNEL ENHANCEMENT MODE MOSFET < Back 3N165 Series MONOLITHIC DUAL, P-CHANNEL ENHANCEMENT MODE MOSFET The 3N165 Series Monolithic Dual, P-Channel Enhancement Mode MOSFET is a direct replacement for Intersil and Siliconix-Vishay part. It is ideal for Amplifier and switching Applications. This part series is available in the Available in the TO-99 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: 3N165 TO-99 8L RoHS 3N166 TO-99 8L RoHS 3N165 SOIC 8L RoHS 3N1646 SOIC 8L RoHS 3N163 Die 3N164 Die Datasheet Spice Model Application Notes

HIGH VOLTAGE, SUPER BETA, MONOLITHIC DUAL, NPN TRANSISTOR < Back LS301 Series HIGH VOLTAGE, SUPER BETA, MONOLITHIC DUAL, NPN TRANSISTOR The LS301 Series High Voltage, Super Beta, Monolithic Dual, NPN Transistor is a direct replacement for the Micro Power Systems MP301, MP302, MP303 Series. It is ideal for Small Signal Transistors, 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: LS301 TO-71 6L RoHS LS302 TO-71 6L RoHS LS303 TO-71 6L RoHS LS301 TO-78 6L RoHS LS302 TO-78 6L RoHS LS303 TO-78 6L RoHS LS301 PDIP 8L RoHS LS302 PDIP 8L RoHS LS303 PDIP 8L RoHS LS301 SOIC 8L RoHS LS302 SOIC 8L RoHS LS303 SOIC 8L RoHS LS301 Die LS302 Die LS303 Die Datasheet Spice Model Application Notes

Linear Systems has been designing, manufacturing, and distributing high-performance JFET Amplifiers, DMOS Switches, Current Regulating Diodes, Bipolar Transistors, and JFET Switches since 1987. Our specialty semiconductors are recognized as the best in their class for precision, reliability, and performance. Building Excellence, One Part at a Time Since 1987, Linear Systems has been a leader in manufacturing specialty semiconductors. Operating from three Silicon Valley fabrication facilities, we serve a wide range of industries, including defense, aerospace, professional audio, and more. Our components are integral to applications such as military underwater surveillance, space telescope cameras, high-fidelity audio equipment, and advanced aerospace sensors. Our dedicated team is committed to delivering high-quality, reliable components, ensuring timely delivery to meet our customers' needs. Request a Quote Tailored Solutions to Meet Your Exact Specifications Get Started Connect with our expert technical team to discuss your project today: Call (510) 490-9160 or Email support@linearsystems.com How We Help You At Linear Systems, we understand that every application has unique demands. That’s why we offer advanced screening and customization options across our full product range, including N-Channel and P-Channel JFETs, High-Speed N-Channel Lateral DMOS Switches, Single and Quad Current-Regulating Diodes, Ultra Low-Leakage Diodes, NPN and PNP Bipolar Transistors, N-Channel and P-Channel Small Signal MOSFETs, and BIFET devices. Our advanced screening process allows for precise parameter selection, covering all specifications listed in our standard data sheets, including detailed package pin-outs. Whether you need tighter tolerances, specific performance metrics, or custom sorting, we can tailor our parts to meet your exact requirements. Let’s build exactly what you need. View Products High-Performance Components for Demanding Applications At Linear Systems, we specialize in precision analog components engineered for exceptional performance in the most demanding industries. Our flagship LSK series of ultra-low-noise JFETs—including the LSK389 and LSK170—delivers industry-leading noise performance trusted in critical applications worldwide. These monolithic dual and single N-Channel JFETs provide outstanding performance at competitive prices, complemented by a wide range of high-performance Improved Standard JFETs. For high-speed switching, our lateral DMOS switches set the standard for speed and reliability. Available as single and quad nanosecond switches with or without protection diodes, they enable fast, precise switching in demanding applications. Our PAD/JPAD/SSTPAD ultra-low-leakage diodes protect sensitive circuit inputs with leakage currents as low as -1 pA (PAD1). They’re ideal for op-amps, ADC analog inputs, analog multiplexers, and RS485 line receivers. The SST500 series of current-regulating diodes ensures consistent performance in high-reliability environments, such as test equipment, medical devices, and instrumentation. Using JFET technology, these diodes simplify circuit integration while maintaining precision. From precision JFETs to specialized diodes and switches, Linear Systems delivers components that meet the highest standards of performance and reliability. Explore our: Low-Noise JFETS Explore our: Low Leakage Diodes Explore our: Current Regulating Diodes Explore our: High-Speed DMOS Switches

< Back Consider the JFET Introduction Though not as well known as the bipolar transistor or op amp, this long-established transistor still excels in where you need to optimize circuit behavior, such as for lowest noise. Many engineers are somewhat familiar with discrete bipolar transistors, such as the venerable 2N2222. They are also comfortable with the MOSFET (metal-oxide semiconductor field-effect transistor) as a discrete device for amplifying analog signals and switching power signals, as well as its role as the key digital structural element in large-scale ICs. But alongside these devices is the JFET (junction field-effect transistor), which was developed soon after the bipolar transistor. To many designers, the JFET is the nearly ideal three-terminal solid-state device, and its operation and parameters are analogous to the vacuum-tube triode. The difference is that the JFET is, of course, a low-voltage, much-more efficient device, although it can't deliver the power that a vacuum tube can. For applications which require extremely low noise, the JFET is often offers superior performance compared to any other discrete device, as well as op amps. Read More

SINGLE, LOW-LEAKAGE, LOW-NOISE, N-CHANNEL JFET AMPLIFIER < Back LS846 SINGLE, LOW-LEAKAGE, LOW-NOISE, N-CHANNEL JFET AMPLIFIER The LS846 Single, Low-Leakage, Low-Noise, N-Channel JFET Amplifier is a single version of LS844 Series. It is ideal for Low Noise and Low Leakage Applications. Available in the TO-72 4L, TO-92 3L and SOT-23 3L RoHS package, as well as die form. 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: LS846 TO-72 4L RoHS LS846 TO-92 3L RoHS LS846 SOT-23 3L RoHS LS846 Die Datasheet Spice Model Application Notes

< Back Linear Systems Capabilities Statement Linear Systems Jun 3, 2024 Who we are and what we do Founded in 1987, Linear Systems is a U.S.-owned, U.S.-based precision discrete semiconductor company. We specialize in developing and manufacturing high-quality, small-signal discrete devices for a variety of high-end applications, including test/measurement, instrumentation, space, military, medical, audio, and sensors. With a wide range of proprietary and standard components, we are committed to providing top-tier solutions to meet the demands of our diverse clientele. Download our Capabilities Statement to read the full document and discover how Linear Systems can meet your semiconductor needs. 2024 Capabilities Statement .pdf Download PDF • 378KB

< Back DMOS App Note Introduction This Application Note describes in detail the principle of operation of the SD210/5000 series of high-speed analog switches and switch arrays. It contains an explanation of the most important switch characteristics, application examples, test data, and other application hints. Read More

< Back JFETs for VC Circuits Introduction Linear Integrated Systems manufactures a variety of FETs (Field Effect Transistors). In particular they have a variety of matched dual products. There are advantages in having matched devices. For example, if you are building a twochannel stereo audio product, having two or four devices in the same package allows for the two audio channels to be more closely matched. This paper will explore using FETs in voltage controlled circuits. Several approaches will be shown: 1. Using FETs as voltage controlled resistors. 2. Using FETs as voltage controlled amplifiers and active mixers. 3. Using FETs as voltage controlled phase shifters for processing music. 4. Using FETs as voltage controlled band pass filters. We will also explore ways to reduce nonlinearities or distortions and automatically bias the FETs. Read More

Linear Systems Purchase Order Terms and Conditions 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. The Company may extend the validity of quotations at its discretion. 3. PAYMENT TERMS Payments shall be in U.S. Dollars. Net terms may be granted upon approval. Customer agrees to remit payment for the invoice in full by the agreed-upon due date. Should payment extend beyond the specified Net Terms, Customer acknowledges and accepts that any outstanding fee not settled within five (5) days from its due date shall accrue interest at a rate of 2.5% per month, commencing from the fifth (5th) day after the due date until payment is made. Upon payment, all fees become nonrefundable. Linear Systems retains the right, at its discretion and at any point, to adjust the monthly interest rate for overdue invoices. The Company may require payment in advance or C.O.D. The Company may suspend performance or require cash payment or other assurances if Buyer’s financial condition warrants it. Payment must be made in Alameda County, California, where any collection action may be brought. Cancellations or reschedules must be requested in writing within seven (7) days of order submission. 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The warranty does not apply to products subject to misuse, neglect, or unauthorized modifications. The Company's liability is limited to rescreening, reprocessing, replacing nonconforming products, or issuing credit for the purchase price. Warranty is contingent upon full payment. All other warranties are disclaimed. 7. INFRINGEMENT Buyer indemnifies the Company against any claims of intellectual property infringement resulting from compliance with Buyer’s designs or specifications. The Company is not liable for any infringement claims arising from the use of products in combination with non-Company products. 8. FORCE MAJEURE The Company is not liable for failure to perform due to unforeseen circumstances or causes beyond its control, such as natural disasters, war, or labor shortages. Delivery dates may be deferred during such delays. 9. CANCELLATIONS AND RESCHEDULES No cancellations or reschedules will be accepted within thirty (30) days of the earliest requested ship date. 10. LIMITATION OF LIABILITY The Company, its employees, officers, and directors are not liable for any breach of this Agreement, product order, or terms and conditions for business interruption costs, special, incidental, or consequential damages. Liability is limited to the amount paid by the Buyer for the products giving rise to the claim. 11. LIFE SUPPORT AND OTHER APPLICATIONS The Company's products are not authorized for use in life support devices or other critical applications without express written approval. Buyer assumes full risk and liability for such use and indemnifies the Company against related claims. 12. MIL-STD CLASS H AND CLASS K APPLICATIONS The Company's products are not authorized for use in MIL-STD Class H and Class K applications without express written approval. Buyer assumes full risk and liability for such use and indemnifies the Company against related claims. 13. 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Buyer’s purchases are final and subject to terms and conditions for NCNR parts. 17. DATECODE POLICY Linear Systems does not accept any restrictions on the sale or shipment of parts based on the device date code unless there are design-specific technical requirements agreed upon by both Linear Systems and the buyer. Linear Systems reserves the right to ship any date code for customer orders and samples. Linear Systems does not acknowledge a correlation between field failures and date codes exceeding 36 months. The Linear Systems Warranty applies to all products regardless of device date codes. 18. CONTROLLING LAW These terms and conditions are governed by the laws of the State of California, with sole jurisdiction and venue in Alameda County, California. 19. GENERAL LEGAL Linear Systems sells product based on our Terms & Conditions, not those of the purchaser. These terms constitute the entire contract and supersede all previous communications. Any changes must be agreed upon in writing. Unenforceable sections do not affect the remaining terms. Failure to enforce any provision does not waive it. Notices must be in writing and sent to the specified Company address. The prevailing party in any legal action is entitled to recover attorney's fees and costs. Rev K 052825 Privacy Policy Collection of Personal Information Visitors to the Linear Integrated Systems' web site are not required to reveal any personal information in order to use many of the features of the site. However, in some instances, Linear Systems requests that users provide certain personal information in order to facilitate future communications, make a purchase of Linear Systems' products, or receive other materials from Linear Systems. What does Linear Systems do with my personal information? 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SD/SST210 SINGLE, HIGH SPEED N-CHANNEL LATERAL DMOS FET SWITCH < Back SD/SST210 Series SD210 SINGLE, HIGH SPEED N-CHANNEL LATERAL DMOS FET SWITCH The SD/SST210 Series is a Single, High Speed N-Channel Lateral DMOS FET Switch, ideal for Ultra-High Speed Switching Applications. Linear Systems acquired the Siliconix Lateral DMOS FET Switch product line, so our version is the same maskset, same process and is an exact pin-for-pin replacement . It is available in the TO-72 4L RoHS and SOT-143 4L 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: SD210DE TO-72 4L RoHS SD214DE TO-72 4L RoHS SST210 SOT-143 4L RoHS SST214 SOT-143 4L RoHS Datasheet Spice Model Applicaton Notes

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back SST/U421 Series LOW LEAKAGE, LOW DRIFT, MONOLITHIC DUAL, N-CHANNEL JFET The SST/U421 Series Low-Noise, Low-Drift, Monolithic Dual N-Channel JFET Amplifier is designed for a broad spectrum of precision instrumentation and sensor applications. This series is offered in TO-71 6L, TO-78 7L, PDIP 8L, and SOIC 8L RoHS-compliant packages, as well as in die form. 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 The following options are available for ordering this part series: U421 TO-71 6L RoHS U422 TO-71 6L RoHS U423 TO-71 6L RoHS U424 TO-71 6L RoHS U425 TO-71 6L RoHS U426 TO-71 6L RoHS U421 TO-78 7L RoHS U422 TO-78 7L RoHS U423 TO-78 7L RoHS U424 TO-78 7L RoHS U425 TO-78 7L RoHS U426 TO-78 7L RoHS SST421 SOIC 8L RoHS SST422 SOIC 8L RoHS SST423 SOIC 8L RoHS SST424 SOIC 8L RoHS SST425 SOIC 8L RoHS SST426 SOIC 8L RoHS U421 Die U422 Die U423 Die U424 Die U425 Die U426 Die Datasheet Spice Model Application Notes

< Back Solving the Noise Puzzle Introduction Noise is one of the more important aspects of circuit design. Lower noise in audio amplifier design means better quality audio. Low-noise in instrument design means more reliable and accurate measurements at lower voltage and current levels. And low-noise in current source designs means less noise injected into the electronic system. One of the most basic approaches to reduce noise in an amplifier is to use low-noise components. This would include low-noise bipolar transistors and low-valued resistors. Although one can use low-noise operational amplifiers in the design of low-noise circuits or low-noise current sources it is often not done. This is because lower noise can be often be obtained with a well-thought out discrete design. And that’s because discrete transistors offer much more design customization capability for specific circuit applications – like optimized collector biasing. One must remember that monolithic chip designs are built for the most part for general purpose applications. It is hard to tailor a specific op amp or current source chip for a specific source resistance, specific power consumption requirement and a specific bandwidth that will lower the overall noise – that is unless you add-on more compensation components. Read More