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Product Detailed Parameters
- Description：JFET 2N-CH 50V 8SOIC
- Series：SST404
- Mfr：Linear Integrated Systems, Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- FET Type：2 N-Channel (Dual)
- Voltage - Breakdown (V(BR)GSS)：50 V
- Drain to Source Voltage (Vdss)：50 V
- Current - Drain (Idss) @ Vds (Vgs=0)：500 µA @ 10 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：500 mV @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：8pF @ 15V
- Resistance - RDS(On)：-
- Power - Max：300 mW
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：8-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：8-SOIC
- Grade：-
- Qualification：-
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Overview
The SST404 is a monolithic dual N-channel JFET pair manufactured by Linear Integrated Systems, Inc. (formerly Micross Components), housed in an SOIC-8 surface mount package. Designed for front-end amplification of low-level signals, it features very low noise and low input bias current. The device utilizes proprietary JFET processing techniques to achieve high breakdown voltage and good frequency response, making it suitable for sensitive medical, instrumentation, and infrared designs.
Feature Summary
- Very low noise performance with input voltage noise density less than 10 nV/√Hz at 10 Hz
- Extremely low input bias current below 2 pA
- High breakdown voltage exceeding 50 V
- Monolithic construction ensuring matched characteristics and stability
Applications
- Precision instrumentation circuits
- Low-noise input amplifiers
- Impedance converters
Procurement Notes
Verify the manufacturer designation carefully, as the SST404 was originally produced by Siliconix and later acquired by Micross Components, which is now part of Linear Integrated Systems. Confirm that the specific lot or revision matches the required specifications for low-noise applications. Ensure the SOIC-8 package type aligns with the PCB footprint requirements. Cross-reference datasheets from Calogic LLC if available, as they may hold related intellectual property or updated documentation for this component lineage.
Selection Notes
Select this component when ultra-low noise and high input impedance are critical for signal integrity. It is ideal for pre-amplifying weak signals from sensors or transducers before further processing. Consider the SOIC-8 package for space-constrained designs requiring surface mount technology. Evaluate the trade-off between the low noise floor and the high breakdown voltage to ensure compatibility with the circuit's operating voltage levels.
Part Context
The SST404 belongs to a family of monolithic dual JFET pairs designed for high-performance analog applications. Originally associated with Siliconix and subsequently Micross Components, these devices are known for their precision matching and low drift. The SOIC-8 variant provides a compact solution compared to traditional through-hole packages, facilitating automated assembly and reduced board space usage in modern electronic systems.
Replacement Considerations
Micross Components LS3954 series offers similar monolithic dual N-channel JFET configurations. Check pinout compatibility and electrical parameter overlaps before substitution.
