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Product Detailed Parameters
- Description：JFET N-Channel -25V Low Ciss
- Series：SMP5484
- 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)：2.5 mA @ 15 V
- Current Drain (Id) - Max：-
- Voltage - Cutoff (VGS off) @ Id：1.5 V @ 10 nA
- Input Capacitance (Ciss) (Max) @ Vds：3.5pF @ 15V
- Resistance - RDS(On)：320 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 SMP5484 is an N-channel Junction Field-Effect Transistor (JFET) utilizing the proprietary N0026S geometry. It operates with a Gate-to-Source Breakdown Voltage of -25 V and a Drain-to-Source Saturation Current range of 1 mA to 5 mA. The device features a typical input capacitance of 4.3 pF and gate leakage current below 10 pA at room temperature. Forward transconductance ranges from 2500 μS to 3500 μS depending on binning. It is housed in a surface-mount SOT23 package.
Feature Summary
- Utilizes InterFET N0026S geometry for optimized performance
- Designed for low noise applications with typical noise figure of 4 nV/√Hz
- Features extremely low gate leakage current, typically less than 10 pA
- Offers low input capacitance to support high-frequency operation
Applications
- VHF/UHF Amplifiers
- Low Noise Amplifier (LNA) stages
- High-impedance input circuits
Procurement Notes
Verify the specific suffix designation when ordering. The SMP5484 indicates the base part number in SOT23 packaging. Confirm whether bulk or tape-and-reel quantities are required, as specifications differ between standard bulk shipping and reel configurations. Ensure the selected variant matches the required IDSS and VGS(off) binning limits for the target circuit design.
Selection Notes
Select the SMP5484 when low noise and minimal gate leakage are critical requirements for VHF or UHF signal paths. Compare the specific electrical binning limits against the application's sensitivity thresholds. Consider the SOT23 package constraints regarding thermal dissipation and physical footprint relative to alternative through-hole options like the TO-92 variant.
Part Context
The SMP5484 belongs to the 2N5484 series of N-channel JFETs manufactured by InterFET. This family includes variants such as the 2N5485 and 2N5486, which share similar breakdown characteristics but differ in saturation current and transconductance ranges. The series is engineered specifically for radio frequency amplifier designs requiring stable performance at high frequencies.
Replacement Considerations
Direct functional equivalents within the same series include the SMP5485 and SMP5486, though their electrical parameters for saturation current and transconductance vary. Cross-family replacements require verification of pinout compatibility and matching breakdown voltage ratings.
