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Product Detailed Parameters
- Description：JFET N-CH 40V 10MA SOT23-3
- Series：LSK170A
- Mfr：Linear Integrated Systems, Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：40 V
- Drain to Source Voltage (Vdss)：40 V
- Current - Drain (Idss) @ Vds (Vgs=0)：2.6 mA @ 10 V
- Current Drain (Id) - Max：10 mA
- Voltage - Cutoff (VGS off) @ Id：200 mV @ 1 nA
- Input Capacitance (Ciss) (Max) @ Vds：20pF @ 15V
- Resistance - RDS(On)：-
- Power - Max：400 mW
- Operating Temperature：-55°C ~ 135°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The LSK170A SOT-23 3L ROHS is a single N-channel JFET designed for ultra-low noise and high input impedance applications. It features a gate-to-source breakdown voltage of -40V minimum, a typical transconductance of 22mS, and an input capacitance of 20pF maximum. The device offers a narrow IDSS range of 2.6mA to 6.5mA and operates within a junction temperature range of -55°C to +135°C.
Feature Summary
- Ultra-low noise performance optimized for both high and low frequencies
- High input impedance with uniquely linear VGS transfer function
- Narrow IDSS range facilitating ease of design in low voltage applications
- Direct pin-for-pin replacement for Toshiba's 2SK170
Applications
- Audio amplifiers and preamplifiers
- Discrete low-noise operational amplifiers
- Guitar pickups and effects pedals
- Microphones and audio mixer consoles
- Acoustic sensors and hydrophones
Procurement Notes
Verify the specific package type (SOT-23) and RoHS compliance status when ordering. Confirm that the A-grade IDSS range matches your circuit requirements. Ensure proper handling procedures are followed due to the high input impedance sensitivity. Check for custom part availability if tighter specifications are needed beyond standard grades.
Selection Notes
Select this component for designs requiring minimal noise contribution at audio frequencies. The narrow IDSS range simplifies biasing in portable or battery-operated circuits. Consider the SOT-23 package for space-constrained PCB layouts where surface mount technology is preferred over through-hole alternatives.
Part Context
This device belongs to the LSK170 series of high input impedance, ultra-low noise JFETs. It serves as an improved functional replacement for Interfet models IF1320, IF1330, IF1331, and IF4500. The series is available in TO-92, SOT-23, and SOT-89 packages to suit various mounting needs.
Replacement Considerations
- Toshiba 2SK170
- Interfet IF1320
- Interfet IF1330
- Interfet IF1331
- Interfet IF4500
FAQ
What is the typical noise voltage at 1kHz?
The typical noise voltage is 0.9nV/√Hz at 1kHz.
Is this device compatible with the 2SK170 pinout?
Yes, it is a direct pin-for-pin replacement for Toshiba's 2SK170.
What is the maximum power dissipation?
The continuous power dissipation is 400mW at +25°C.
