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< Back SD5400/SD5000 Linear Systems Mar 17, 2023 Introducing Family of Quad N-channels NEWS RELEASE FOR INFORMATION CONTACT: Linear Systems, Inc. Sales Department Phone: (510) 490-9160 Email: sales@linearsystems.com Linear Systems Announces the Immediate Availability of SD5400 / SD5000 Family of Quad N-Channel Enhancement Mode Lateral DMOS Analog Switches FREMONT, CA – Linear Systems is announcing the immediate availability of the SD5400 / SD5000 Family of Quad N-Channel Enhancement Mode Lateral DMOS Analog Switches, specifically designed for high-speed switching applications. These ultra-fast switches offer improved accuracy, speed, and throughput, with less glitching or distortion than JFETs or multiplexers. Designed for high-frequency RF operation, they provide switching speeds of 1ns with a unique combination of 70 ohms "ON" resistance and a reverse transfer capacitance of 0.5 pF. A maximum threshold of 1.5 volts permits simple TTL and CMOS driving for small signal applications. The SD5400 / SD5000 can switch analog signals up to +/- 10 volts, while the SD5401 / SD5001 can switch signals up to +/- 5 volts. All versions include gate ESD protection with zener diodes. The surface mount versions, SD5400 / SD5401, are available in 14 and 16 pin narrow body SOIC packages. The thru-hole versions, SD5000N / SD5001N, are available in 16 pin DIP packages. All package types are available with special electrical selection, including bare die form. Summary of Features : - High Speed Switching (td (ON) / (OFF) = 1ns max) - Ultra Low Reverse Capacitance (Crss = 0.5 pF max) - Low Turn-On Threshold Voltage (Vgs(th) = 1.5V max) - Switches Analog Signals up to +/- 10 volts - CMOS and TTL Compatible - Second Source Replacement for Calogic and Siliconix SD5400 / SD5000 Families - Available in Surface Mount SOIC-14, 16 pin, PDIP-16 Packages, and Bare Die Applications: - ATE (Automatic Test Equipment) Analog Switch - Analog to Digital and Digital to Analog Converters - Laser Drivers - Medical Imaging - Multiplexer - Sample and Hold - Switch Driver - Vision Systems Delivery: Factory Stock For more information, contact Linear Systems at sales@linearsystems.com or call (510) 490-9160. About Linear Systems Founded in 1987, Linear Systems is a full-service, privately-held designer and manufacturer of small-signal discrete semiconductors. The Fremont, CA-based company was founded by John H. Hall, co-founder of Intersil and founder of Micro Power Systems. Linear Systems' product line includes 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. Datasheets, application notes, SPICE models, and additional information can be downloaded at www.linearsystems.com.

< Back Millions of Devices in Stock! Linear Systems Mar 17, 2023 LS844 Monolithic Dual Small-Signal JFET, 3N163 Small-Signal MOSFET, LS320 BiFET and Many More! NEWS RELEASE FOR INFORMATION CONTACT: Linear Systems, Inc. Sales Department Phone: (510) 490-9160 Email: sales@linearsystems.com Linear Systems Announces Large-Scale Availability of Ultra Low Noise JFETs and Small-Signal Semiconductors FREMONT, Calif. – August 26, 2021 – Linear Systems, a world-class producer of ultra-low-noise JFETs and other small-signal discrete semiconductors, announces the large-scale availability of five of its top-performing components. These components, ranging from low-noise monolithic dual JFETs to small-signal MOSFETs, are available in wafer form in quantities ranging from one million to ten million for immediate packaging and shipment. All parts meet Linear Systems' industry-leading datasheet specifications and are available for fast delivery due to substantial buffer stock of wafers. Parts available for shipment include : 1. LS844 Monolithic Dual Small-Signal JFET: One million dice in wafer form in stock. This low-noise front-end amplifier features high Common Mode Rejection Ratio and excellent matching over a wide range of temperatures. [Download Data Sheet] 2. 3N163 Small-Signal MOSFET : Three million dice in wafer form in stock. Ideal for sensor applications such as gas detection and piezo devices, with half the noise of competitors' parts. [Download Data Sheet] 3. LS320 BiFET Amplifier: 1.3 million dice in wafer form in stock. A high-input impedance, single monolithic amplifier, designed as a direct replacement for Amperex equivalent parts. Perfect for high impedance sense amplifier applications. [Download Data Sheet] 4. 2N/PN/SST4391 N-Channel JFET Series: 2.5 million dice in wafer form in stock. This single, low-noise N-channel JFET switch is ideal for low-noise, high-gain, low-resistance switching and amplifier applications. [Download Data Sheet] 5. 2N/PN/SST4117A N-Channel JFET Series: 14.3 million dice in wafer form in stock. This single, low-capacitance, ultra-high-input-impedance N-channel JFET amplifier is a direct replacement for Fairchild, NXP, and Siliconix-Vishay parts. [Download Data Sheet] These parts are also available in bare die and sorted wafer form. In addition to these million-plus parts inventories, Linear Systems keeps substantial quantities of all its parts on hand, including the industry-leading LSK389 monolithic dual N-channel ultra-low-noise JFET. About Linear Systems Founded in 1987, Linear Systems is a Silicon Valley-based designer, manufacturer, and seller of precision, high-performance, small-signal discrete semiconductors. Linear Systems produces ultra-low-noise monolithic dual and single JFETs, bipolar transistors, high-speed DMOS switches, small-signal MOSFETs, ultra-low-leakage diodes, and BiFET amplifiers. These parts are designed into world-class products in fields such as Test & Measurement, Audio, Scientific Optical, Military Sensor, Hydrophone/Sonobuoys, Industrial Controls, and Hybrids. For these and other parts, download Linear Systems' [Product Selection Guide] and [Databook]. For more information, visit www.linearsystems.com .

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back LS840 Series LOW-NOISE, LOW-DRIFT, LOW CAPACITANCE, MONOLITHIC DUAL N-CHANNEL JFET AMPLIFIER The LS840 Series Low-Noise, Low-Drift, Low-Capacitance, Monolithic Dual N-Channel JFET Amplifier is a pin-for-pin replacement for the Fairchild, Motorola, National and Siliconix-Vishay part series. Available in the TO-71 6L, TO-78 6L, PDIP 8L 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: LS840 TO-71 6L RoHS LS841 TO-71 6L RoHS LS842 TO-71 6L RoHS LS840 TO-78 6L RoHS LS841 TO-78 6L RoHS LS842 TO-78 6L RoHS LS840 PDIP 8L RoHS LS841 PDIP 8L RoHS LS842 PDIP 8L RoHS LS840 SOIC 8L RoHS LS841 SOIC 8L RoHS LS842 SOIC 8L RoHS LS840 Die LS841 Die LS842 Die Datasheet Spice Model Application Notes

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back 2N/LS3954 Series LOW NOISE, LOW DRIFT, MONOLITHIC DUAL, N-CHANNEL JFET The 2N/LS3954 Series Low Noise, Low Drift, Monolithic Dual, N-Channel JFETs are ideal for amplifier applications. The series is a pin-for-pin replacement for National & Siliconix-Vishay 2N3954 Series. These devices are available in TO-71 6L, PDIP 8L and SOIC 8L RoHS package types, 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: LS3954A TO-71 6L RoHS LS3954 TO-71 6L RoHS LS3955 TO-71 6L RoHS LS3956 TO-71 6L RoHS LS3958 TO-71 6L RoHS LS3954A PDIP 8L RoHS LS3954 PDIP 8L RoHS LS3955 PDIP 8L RoHS LS3956 PDIP 8L RoHS LS3958 PDIP 8L RoHS LS3954A SOIC 8L RoHS LS3954 SOIC 8L RoHS LS3955 SOIC 8L RoHS LS3956 SOIC 8L RoHS LS3958 SOIC 8L RoHS LS3954A Die LS3954 Die LS3955 Die LS3956 Die LS3958 Die Datasheet Spice Model Application Notes

TIGHTLY MATCHED, MONOLITHIC DUAL, NPN TRANSISTOR < Back LS310 Series TIGHTLY MATCHED, MONOLITHIC DUAL, NPN TRANSISTOR The LS310 Series, Tightly Matched, Monolithic Dual, NPN Transistor is a direct replacement for Analog Devices MAT series and National LM3494 series. It is ideal for Tight Matching, Small Signal Transistor Amplifier & Switching Applications. It is available the in TO-71 6L, TO-78 6L, PDIP 8L, SOIC 8L, SOT-23 6L and DFN 8L 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: LS310 TO-71 6L RoHS LS311 TO-71 6L RoHS LS312 TO-71 6L RoHS LS313 TO-71 6L RoHS LS310 TO-78 6L RoHS LS311 TO-78 6L RoHS LS312 TO-78 6L RoHS LS313 TO-78 6L RoHS LS310 PDIP 8L RoHS LS311 PDIP 8L RoHS LS312 PDIP 8L RoHS LS313 PDIP 8L RoHS LS310 SOIC 8L RoHS LS311 SOIC 8L RoHS LS312 SOIC 8L RoHS LS313 SOIC 8L RoHS LS310 SOT-23 6L RoHS LS311 SOT-23 6L RoHS LS312 SOT-23 6L RoHS LS313 SOT-23 6L RoHS 311 DFN 8L RoHS 312 DFN 8L RoHS LS310 Die LS311 Die LS312 Die LS313 Die Datasheet Spice Model Application Notes

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back SST/U440 Series WIDEBAND HIGH GAIN MONOLITHIC DUAL N-CHANNEL JFET AMPLIFIER The SST/U440 Series Wideband, High-Gain, Monolithic Dual N-Channel JFET Amplifier is targeted for use in a wide range of precision instrumentation and sensor applications. The series is available inThe SST/U440 Series Wideband, High-Gain, Monolithic Dual N-Channel JFET Amplifier is targeted for use in a wide range of precision instrumentation and sensor applications. The series is available in the TO-71 6L and SOIC 8L RoHS package, as well as in die form. Advance d 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: U440 TO-71 6L RoHS U441 TO-71 6L RoHS SST440 SOIC 8L RoHS SST441 SOIC 8L RoHS Datasheet Spice Model Application Notes

< Back LSK389 App Note Introduction The LSK389 is the industry’s lowest noise Dual N-Channel JFET, 100% tested, guaranteed to meet 1/f and broadband noise specifications, while eliminating burst (RTN or popcorn) noise entirely. The product displays high transconductance and very good matching. It is the JFET of choice for low noise applications, especially those requiring a differential amplifier input stage. Read More

SINGLE, LOW NOISE, LOW CAPACITANCE, HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER < Back LSK170 Series SINGLE, LOW NOISE, LOW CAPACITANCE, HIGH INPUT IMPEDANCE, N-CHANNEL JFET AMPLIFIER The LSK170 Single, Low Noise, Low Capacitance, High Input Impedance, N-Channel JFET Amplifier is a direct replacement for Toshiba 2SK170. It is ideal for Ultra Low Noise Audio/Acoustic Applications. Available in the TO-92 3L RoHS, SOT-23 3L RoHS and SOT-89 3L RoHS package, 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 Below are the options you have when ordering this part series: LSK170A TO-92 3L RoHS LSK170B TO-92 3L RoHS LSK170C TO-92 3L RoHS LSK170D TO-92 3L RoHS LSK170A SOT-23 3L RoHS LSK170B SOT-23 3L RoHS LSK170C SOT-23 3L RoHS LSK170D SOT-23 3L RoHS LSK170A SOT-89 3L RoHS LSK170B SOT-89 3L RoHS LSK170C SOT-89 3L RoHS LSK170D SOT-89 3L RoHS LSK170A Die LSK170B Die LSK170C Die LSK170D Die Datasheet Spice Model Application Notes

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

LOG CONFORMANCE, MONOLITHIC DUAL, NPN TRANSISTOR < Back LS318 LOG CONFORMANCE, MONOLITHIC DUAL, NPN TRANSISTOR Previous Next

< 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.

< Back Design Specs for JFETs Introduction Junction field effect transistors (JFETs) are used and are useful in many different circuit topologies. Because these devices function as voltage controlled current sources (VCCS) as opposed to current controlled current sources (CCCS), they offer designers certain flexibilities in designs not available when using bipolar transistors (which are CCCS devices). JFETs can also be used as voltage controlled variable resistors and voltage-controlled switches. JFETs have extremely high input impedances (on the order of giga-ohms) and extremely low input leakage currents (on the order of pico-amps). Selected parts are designed to have excellent performance in high and very high frequency (VHF) circuits. Read More