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Product Detailed Parameters
- Description：JFET N-Channel -25V Low Ciss
- Series：SMP5485
- Mfr：InterFET
- Package：Strip
- FET Type：N-Channel
- Voltage - Breakdown (V(BR)GSS)：-
- Drain to Source Voltage (Vdss)：25 V
- Current - Drain (Idss) @ Vds (Vgs=0)：6 mA @ 15 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：2.5 V @ 10 nA
- Input Capacitance (Ciss) (Max) @ Vds：3.5pF @ 15V
- Resistance - RDS(On)：220 Ohms
- Power - Max：350 mW
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The InterFET SMP5485 is an N-Channel Junction Field Effect Transistor (JFET) utilizing the proprietary N0026S geometry. It features a Gate-to-Source Breakdown Voltage of -25V, a Drain-to-Source Saturation Current range of 4mA to 10mA, and a Gate-to-Source Cutoff Voltage between -0.5V and -4V. The device exhibits a Forward Transconductance of 3000μS to 3500μS, Input Capacitance of 5pF, Reverse Transfer Capacitance of 1pF, and Output Capacitance of 2pF at 1MHz.
Feature Summary
- Utilizes InterFET N0026S geometry for optimized performance
- Designed for low noise applications with typical input noise of 4 nV/√Hz
- Features extremely low gate leakage current, typically less than 10pA at room temperature
- Offers minimal input capacitance to support high-frequency signal integrity
Applications
- VHF/UHF Amplifiers
- Low Noise Amplifier (LNA) stages
- High-frequency signal processing circuits
Procurement Notes
Verify the specific suffix against official documentation to confirm packaging type, as standard designations may vary between bulk, tape and reel, or chip tray formats. Ensure the ordering part number matches the required mechanical package and binning specifications provided in the manufacturer's datasheet before finalizing procurement.
Selection Notes
Select this component when designing VHF/UHF amplifiers requiring low noise and low leakage characteristics. The SMP5485 provides a balanced combination of transconductance and capacitance suitable for high-frequency analog applications. Consider the available package options, including surface mount SOT23 and through-hole TO-92, based on board layout constraints.
Part Context
The SMP5485 belongs to the 2N5484-5-6 series of N-Channel JFETs manufactured by InterFET. This family shares identical electrical characteristics but differs in physical packaging. The SMP5485 specifically denotes the surface-mount variant housed in an SOT23 package, offering flexibility for automated assembly processes compared to its through-hole counterparts.
Replacement Considerations
The 2N5485 serves as the direct through-hole equivalent with identical electrical parameters. For bare die requirements, the 2N5485COT or 2N5485CFT variants are available. Verify pinout compatibility and thermal management requirements when substituting between package types.
FAQ
What is the typical gate leakage current for the SMP5485?
The gate leakage current is typically less than 10pA at room temperature.
What is the maximum continuous forward gate current rating?
The maximum continuous forward gate current is rated at -25 mA.
Does the SMP5485 support RoHS compliance?
Yes, the SMP5485 is RoHS compliant.
