SINGLE, N-CHANNEL ENHANCEMENT MODE MOSFET < Back 3N170 Series SINGLE, N-CHANNEL ENHANCEMENT MODE MOSFET The 3N170 Series Single, N-Channel Enhancement Mode MOSFET is a direct replacement for Intersil and Siliconix-Vishay equivalent part. It is ideal for Amplifier and Switching Applications. The part series is available in the TO-72 4L RoHS and SOT-143 4L RoHS package, as well 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: 3N170 TO-72 4L RoHS 3N171 TO-72 4L RoHS 3N170 SOT-143 4L RoHS 3N171 SOT-143 4L RoHS Datasheet Spice Model Application Notes

LOG CONFORMANCE, MONOLITHIC DUAL, PNP TRANSISTOR < Back LS358 LOG CONFORMANCE, MONOLITHIC DUAL, PNP TRANSISTOR Previous Next

Linear Systems designs and manufactures the highest-performance line of monolithic dual JFETs in the industry. Contact us for a quote! Back SST/U401 Series LOW-NOISE, LOW-DRIFT, MONOLITHIC DUAL N-CHANNEL JFET AMPLIFIER The SST/U401, 402, 403, 404, 405 and 406 Low-Noise, Low-Drift, Monolithic Dual N-Channel JFET amplifiers are targeted for use in a wide range of precision instrumentation and sensor applications. They are available in the TO-71 6L, SOIC 8L and SOT-23 6L 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: U401 TO-71 6L RoHS U402 TO-71 6L RoHS U403 TO-71 6L RoHS U404 TO-71 6L RoHS U405 TO-71 6L RoHS U406 TO-71 6L RoHS SST401 SOIC 8L RoHS SST402 SOIC 8L RoHS SST403 SOIC 8L RoHS SST404 SOIC 8L RoHS SST405 SOIC 8L RoHS SST406 SOIC 8L RoHS U401 Die U402 Die U403 Die U404 Die U405 Die U406 Die Datasheet Spice Model Application Notes

MONOLITHIC DUAL, PNP TRANSISTOR < Back IT130 Series MONOLITHIC DUAL, PNP TRANSISTOR The IT130 Series Monolithic Dual, PNP Transistor is a direct replacement for the Intersil IT130 Series. It is ideal for Small Signal Transistor 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 st andard 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: IT130A TO-71 6L RoHS IT130 TO-71 6L RoHS IT131 TO-71 6L RoHS IT132 TO-71 6L RoHS IT130A TO-78 6L RoHS IT130 TO-78 6L RoHS IT131 TO-78 6L RoHS IT132 TO-78 6L RoHS IT130A PDIP 8L RoHS IT130 PDIP 8L RoHS IT131 PDIP 8L RoHS IT132 PDIP 8L RoHS IT130A SOIC 8L RoHS IT130 SOIC 8L RoHS IT131 SOIC 8L RoHS IT132 SOIC 8L RoHS IT130A Die IT130 Die IT131 Die IT132 Die Datasheet Spice Model Application Notes

LS3250 Single NPN High-Speed Switching Transistor < Back LS3250S - Single The LS3250 Single is a high-performance NPN high-speed switching transistor designed for demanding applications in both analog and digital circuits. Engineered for high-speed switching with low saturation voltage, it enhances efficiency while minimizing power loss, making it ideal for general-purpose switching and signal processing across a wide range of industrial and consumer electronics applications. Available Packages: Die Form (waffle pack ) SOT-23 (3L) (surface-mount ) TO-92 (3L) (through-hole ) Key Features & Benefits: Low Saturation Voltage: Enhances efficiency and reduces power loss Compact Packaging: Versatile options for surface-mount and through-hole applications High-Speed Switching: Optimized for fast, reliable performance in critical circuits Applications: High-speed switching circuits Analog circuit amplification Signal processing Consumer electronics Advanced Screening Options: 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 available when ordering this part series: Standard Part Call-Out: LS3250S DIE LS3250S SOT-23 3L RoHS LS3250S TO-92 3L RoHS Select Part Call-Out:Select parts include SEL + 4-digit numeric code LS3250S DIE SELXXXX LS3250S SOT-23 3L RoHS SELXXXX LS3250S TO-92 3L RoHS SELXXXX High-performance NPN high-speed switching transistor designed for demanding applications in both analog and digital circuits. Datasheet Spice Model Application Notes

LOW LEAKAGE, MONOLITHIC DUAL, PICO-AMP DIODE < Back DPAD/SSTDPAD Series JPAD SERIES SINGLE, PICO AMP, LOW LEAKAGE DIODES The DPAD Series Low Leakage, Monolithic Dual, Pico-Amp Diode is a direct replacement for the Siliconix-Vishay part series. It is ideal for Pico Amp, Ultra Low Leakage, Protection Diode Applications. This part series is available in the TO-72 4L RoHS, TO-78 5L RoHS and SOIC 8L 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: DPAD1 TO-72 4L RoHS DPAD2 TO-72 4L RoHS DPAD5 TO-72 4L RoHS DPAD10 TO-72 4L RoHS DPAD20 TO-72 4L RoHS DPAD50 TO-72 4L RoHS DPAD100 TO-72 4L RoHS DPAD1 TO-78 5L RoHS DPAD2 TO-78 5L RoHS DPAD5 TO-78 5L RoHS DPAD10 TO-78 5L RoHS DPAD20 TO-78 5L RoHS DPAD50 TO-78 5L RoHS DPAD100 TO-78 5L RoHS DPAD1 SOIC 8L RoHS DPAD2 SOIC 8L RoHS DPAD5 SOIC 8L RoHS DPAD10 SOIC 8L RoHS DPAD20 SOIC 8L RoHS DPAD50 SOIC 8L RoHS DPAD100 SOIC 8L RoHS DPAD1 Die DPAD2 Die DPAD5 Die DPAD10 Die DPAD20 Die DPAD50 Die DPAD100 Die Datasheet Spice Model Application Notes

MONOLITHIC DUAL, NPN TRANSISTOR < Back IT124 MONOLITHIC DUAL, NPN TRANSISTOR Previous Next

< Back John H. Hall Linear Systems Mar 17, 2023 In Remembrance of Linear Systems' Founder John H. Hall FREMONT, CA - Linear Systems, Inc., a California developer and manufacturer of small-signal discrete semiconductors, announced the passing of its founder and CEO, John H. Hall. Hall was a pioneer in the development of low power CMOS integrated circuits. He founded or co-founded multiple innovative Silicon Valley companies, including Intersil, MicroPower Systems, and Integrated Wave Technologies, Inc., in addition to Linear Integrated Systems. Over the course of his career, Hall received 21 patents covering advanced semiconductor processes and designs. Hall was a protégé of Dr. Jean Hoerni, one of the "Traitorous Eight" who left Shockley Semiconductor Laboratory and co-founded rival Fairchild Semiconductor. In turn, many of Hall's former employees such as David Fullagar went on to become major Silicon Valley contributors. "John's professional contributions over a 60-year career were matched only by his generosity toward the people around him," said Cindy L Johnson,. "He is greatly missed by his family and friends." In accordance with Hall's wishes Linear Integrated Systems will continue its work as a world-class developer and producer of specialized discrete semiconductors, A year before Mr. Hall died he appointed Cindy L. Johnson as president. In 2014 the board of directors appointed Cindy L. Johnson as CEO. Chief Executive Officer Cindy L. Johnson Cindy L. Johnson has 37 years of Silicon Valley experience, starting her career with MicroPower Systems in 1977. Johnson began her career working for John H. Hall at Micro Power Systems and in 1986 was a co-founder of Linear Integrated Systems, Inc. Johnson has served as president and chief financial officer (CFO) of Linear and will continue as CFO in addition to assuming the position of CEO.

TIGHTLY MATCHED, MONOLITHIC DUAL, NPN TRANSISTOR < Back LS3250 Series - Dual TIGHTLY MATCHED, MONOLITHIC DUAL, NPN TRANSISTOR The LS3250 Tightly Matched, Monolithic Dual, NPN Transistor is a Higher Current Version of the MP310, MP311, MP312, and MP313 Series. It is ideal for Higher Current, 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: LS3250A TO-71 6L RoHS LS3250B TO-71 6L RoHS LS3250C TO-71 6L RoHS LS3250A TO-78 6L RoHS LS3250B TO-78 6L RoHS LS3250C TO-78 6L RoHS LS3250A PDIP 8L RoHS LS3250B PDIP 8L RoHS LS3250C PDIP 8L RoHS LS3250A SOIC 8L RoHS LS3250B SOIC 8L RoHS LS3250C SOIC 8L RoHS LS3250A Die LS3250B Die LS3250C Die Datasheet Spice Model Application Notes

< Back LSJ689 Press Release Linear Systems Mar 17, 2023 Ultra Low Noise P-Channel Dual JFET NEWS RELEASE CONTACT: Linear Integrated Systems, Inc. 510-490-9160 sales@linearsystems.com LINEAR INTEGRATED SYSTEMS ANNOUNCES ULTRA LOW NOISE P-CHANNEL DUAL JFET Fremont, California – June 1, 2016 – Linear Integrated Systems, a leading full-service manufacturer of specialty linear semiconductors, announces the immediate availability of its LSJ689, a 1.8 nV/Hz @ 1kHz, low-capacitance, monolithic dual P-Channel JFET. The LSJ689 serves as the P-Channel complement to the popular monolithic dual N-Channel JFET, the LSK489. This addition to Linear Systems' family of Ultra-Low-Noise JFETs provides designers with expanded options beyond traditional N-Channel JFETs. The monolithic dual construction of the LSJ689 and LSK489 offers superior solutions for tighter Idss (drain-source saturation current) matching and improved thermal tracking compared to using individually matched JFETs. As the availability of P-Channel JFETs has declined, complementary single N-Channel and P-Channel JFETs have become increasingly limited to a few industry standards. In response, Linear Systems developed the LSK170 and LSJ74 families, providing complementary N & P-Channel single JFETs. Now, the LSJ689 and LSK489 monolithic dual JFETs provide further design flexibility, with significantly lower capacitance—4 pF versus the 25 pF of LSK170 and LSJ74. The LSJ689 and LSK489 are well-suited for differential input stages in amplifier, phono, and preamplifier designs. Additional applications include voltage-controlled resistors, thermal stable source followers, sample and hold circuits, and current matched sources. The LSJ689 is available in RoHS-compliant SOT-23 6L, SOIC-A 8L, and TO-71 6L package options. The SOT-23 6L and SOIC-A 8L packages are ideal for space-constrained circuits in audio and instrumentation applications. Key Features: - Complement to the Ultra Low Noise Monolithic Dual N-Channel JFET LSK489 - Ultra Low Noise (typically 1.8 nV/Hz @ 1kHz) - Nearly Zero Popcorn Noise - Idss (drain-source saturation current) matching to 10% max - Low Offset/Tight Matching (|Vgs1 - Vgs2| = 20mV max) - Low Capacitance (Ciss = 4 pF) - High Input Impedance - High Breakdown Voltage (BVGSS = 40V Min) - Monolithic Dual (2 JFETs on one piece of silicon, offering better matching and thermal tracking) - Available in Surface Mount SOIC-A 8L and compact SOT-23 6L packages - Lead-free/RoHS Compliant Applications: - Microphone Amplifiers, Phono Preamplifiers, Audio Amplifiers, and Preamps - Discrete Low-Noise Operational Amplifiers - Battery-Operated Audio Preamps - Audio Mixer Consoles, Acoustic Sensors, Sonic Imaging - Instrumentation Amplifiers - Wideband Differential Amplifiers - High-Speed Comparators - Impedance Converters - Voltage-Controlled Resistors, Sample and Hold, Source Followers Availability: Sampling now in SOIC-A 8L, TO-71 6L, and SOT-23 6L package options. Delivery: Factory Stock About Linear Integrated Systems Founded in 1987, Linear Integrated Systems is a precision semiconductor company providing high-quality discrete components. The company’s expertise is built upon processes and products developed at Amelco, Union Carbide, Intersil, and Micro Power Systems by founder John H. Hall. Hall, a protégé of Silicon Valley legend Dr. Jean Hoerni, previously served as Director of IC Development at Union Carbide, co-founder and Vice President of R&D at Intersil, and founder/president of Micro Power Systems. Linear Systems is a U.S.-based, full-service manufacturer of specialty linear products headquartered in Fremont, California. The company’s small-signal discrete product lines are specifically designed to meet new design and second-source requirements in the audio, hybrid, medical, space, and test and measurement markets. Our product lines include BIFET Amplifiers, Bipolar Transistors, Current Regulating Diodes, JFETs, High-Speed Lateral DMOS Switches, Low Leakage Diodes, and MOSFETs. Linear Integrated Systems provides pin-for-pin replacements for more than 2,000 discrete devices, including those currently offered or previously discontinued by Interfet, Intersil, Micro Power Systems, Motorola, National, Fairchild, Toshiba, and Siliconix-Vishay. Engineers are encouraged to contact Linear Systems for assistance with applications or special testing needs.

SINGLE, HIGH FREQUENCY, N-CHANNEL JFET AMPLIFIER < Back J/SST/U308 Series SINGLE, HIGH FREQUENCY, N-CHANNEL JFET AMPLIFIER The J/SST/U308 Series Single, High Frequency, N-Channel JFET Amplifier is a direct replacement for the Fairchild, NXP and Siliconix-Vishay equivalent part. It is ideal for High Frequency Applications. The series is available in the TO-92 3L RoHS, TO-18 3L RoHS and SOT-23 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: J308 TO-92 3L RoHS J309 TO-92 3L RoHS J310 TO-92 3L RoHS U308 TO-18 3L RoHS U309 TO-18 3L RoHS U310 TO-18 3L RoHS SST308 SOT-23 3L RoHS SST309 SOT-23 3L RoHS SST310 SOT-23 3L RoHS U308 Die U309 Die U310 Die Datasheet Spice Model Application Notes

Ultra-Low Noise, High Input Impedance, N-Channel JFET Amplifier < Back LSBF862 Ultra-Low Noise, High Input Impedance, N-Channel JFET Amplifier The LSBF862 Single, Ultra-Low Noise, High Input Impedance, N-Channel JFET Amplifier is a direct, improved replacement for the discontinued NXP BF862. It is designed for applications requiring exceptional noise performance and high-impedance signal amplification. Engineered for precision and reliability, the LSBF862 provides superior noise characteristics, higher breakdown voltage, and greater flexibility through selectable testing and screening options. It is ideal for low-noise audio, acoustic, and sensor front-end applications. Available in the SOT-23 3L RoHS package, as well as in custom die form, the LSBF862 supports both legacy and next-generation designs. Key Features Low 10 Hz Noise High Input Impedance, Low Capacitance Higher −40 V Gate-Source Breakdown Voltage Radiation Tolerant (No Special Hardening Required) Symmetrical Geometry — Source/Drain Interchangeable Special Testing Available for VGS, IDSS, and Other DC Parameters Benefits Superior Noise Performance for Audio, Acoustic, Instrumentation and Sensor Applications Seamless Drop-In Replacement for the BF862 — No Redesign Required Supports Repairs and Spares for Legacy Designs Available Customization by Specialized Screening and Selection Applications Audio & Acoustic Amplifiers Charge, Buffer, and Sample-and-Hold Circuits Discrete Operational Amplifiers Transimpedance Amplifiers (TIAs) Photodiode and Piezoelectric Preamplifiers Microphone, Hydrophone, and Sonar Front-Ends Medical Instrumentation: ECG, EEG, EKG, MRI, PET High-Impedance Probes and Spectrum Analyzers Frequently Asked Questions (FAQ) Is the LSBF862 a direct BF862 replacement? Yes. It is a drop-in, improved replacement with lower noise, higher breakdown, and long-term availability. Is it in active production? Yes. Current available inventory of SOT-23 3 Lead package and Die Form, with no plans to discontinue. Is the LSBF862 available with special sorting or matching? Yes. 100% Special testing is offered Additional Special Screening & Customization Options Special screening is available across Linear Systems’ product lineup — including JFETs, MOSFETs, Bipolar Transistors, Current Regulators, and Diodes. Available in the SOT-23 3L RoHS package, as well as in die form. Connect with our technical team to tailor your requirements: Email support@linearsystems.com or call (510) 490-9160 MOQ applies to all specialized services. Click Here to Request Free LSBF862 Samples Ordering Information Below are the available configurations for the LSBF862 series: Standard Part Call-Out Select Part Call-Out (Select Parts Include SEL + 4 Digit Numeric Code) LSBF862 SOT-23 3L RoHS LSBF862 SOT-23 3L RoHS SELXXXX LSBF862 Die LSBF862 Die SELXXXX When ordering, include the full Linear Systems part number and package type. Custom screening selections (VGS, IDSS, etc.) available upon request. Datasheet Spice Model Application Notes