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Product Detailed Parameters
- Description：JFET 2N-CH 25V 8SOIC
- Series：SST440
- Mfr：Linear Integrated Systems, Inc.
- Package：Tube
- FET Type：2 N-Channel (Dual)
- Voltage - Breakdown (V(BR)GSS)：25 V
- Drain to Source Voltage (Vdss)：-
- Current - Drain (Idss) @ Vds (Vgs=0)：-
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：-
- Input Capacitance (Ciss) (Max) @ Vds：3pF @ 10V
- Resistance - RDS(On)：-
- Power - Max：500 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 SST440 is a monolithic dual N-channel JFET amplifier in an 8-pin SOIC package. It serves as a direct replacement for the discontinued Siliconix U/SST440 and U/SST441. Key electrical parameters include a gate-to-source breakdown voltage of -25V, a forward transconductance ranging from 4.5 to 9 mS, and an input capacitance of 3 pF. The device features a common mode rejection ratio (CMRR) of at least 85 dB and low gate leakage current of ≤ 1 pA.
Feature Summary
- Direct replacement for discontinued Siliconix U/SST440 and U/SST441 devices
- High common mode rejection ratio ensuring precise differential signal handling
- Extremely low gate leakage current for minimal signal distortion
- Monolithic dual chip design reduces parasitics for high-frequency performance
Applications
- Wideband differential amplifiers
- High-speed temperature-compensated single-ended input amplifiers
- High-speed comparators
- Impedance converters and vibration detectors
Procurement Notes
Verify that the specific order suffix matches the required variant, as the datasheet distinguishes between U/SST440 and U/SST441 based on matching characteristics. Confirm the package type is the 8-lead SOIC with symmetrical pinout. Ensure the component meets the absolute maximum ratings for storage and operating junction temperatures during procurement planning.
Selection Notes
Select this component when replacing legacy Siliconix parts in existing designs requiring tight matching characteristics. Consider the 85 dB CMRR and low noise specifications for precision applications. Evaluate the 3 pF input capacitance for high-frequency bandwidth requirements. Verify that the 500 mW power dissipation rating fits the thermal constraints of the target enclosure.
Part Context
Linear Integrated Systems manufactures the SST440 using proprietary processes derived from expertise at Amelco, Union Carbide, Intersil, and Micro Power Systems. Founded in 1987, the company focuses on high-performance discrete semiconductors. This part belongs to the U Series, which includes both TO-71 and SOIC package options for different manufacturing needs.
Replacement Considerations
This component is explicitly documented as a direct replacement for the discontinued Siliconix U/SST440 and U/SST441. Designers migrating from these legacy parts should verify pin compatibility within the SOIC package.
