SMP4220TR

Overview

The InterFET SMP4220TR is an N-Channel Junction Field-Effect Transistor (JFET) in a surface-mount SOT-23 package, supplied in tape and reel format. It utilizes the InterFET N0016H geometry to achieve low noise performance of 6 nV/√Hz typical and low input capacitance of 3.5pF typical. The device features a gate-to-source breakdown voltage of -30V minimum and operates with drain-to-source saturation currents ranging from 0.5mA to 2mA depending on the variant. Forward transconductance ranges from 1000μS to 2000μS.

Feature Summary

• Utilizes InterFET N0016H geometry for optimized electrical characteristics
• Provides high input impedance with typically less than 10pA gate leakage
• Designed for sensitive amplifier stages in mid-frequency applications
• RoHS compliant with available surface mount, through-hole, and bare die options

Applications

• Mixers
• Oscillators
• Small Signal Amplifiers
• VHF Amplifiers

Procurement Notes

Verify that the specific order matches the required datasheet variant, as the 'A' suffix denotes screening for lower noise parameters. Confirm the packaging configuration aligns with production needs, noting that the TR suffix indicates tape and reel delivery. Ensure design validation covers all field use cases and extreme conditions, as application compliance remains the buyer's responsibility.

Selection Notes

Select this component for designs requiring high input impedance and low noise figures in mid-frequency circuits. The SOT-23 package facilitates compact surface-mount layouts. Consider the 'A' variant if strict noise specifications are critical, as standard variants may exhibit higher noise levels. Evaluate thermal derating requirements based on the specified power dissipation limits.

Part Context

This part belongs to the InterFET 2N4220/A and 2N4221/A family of N-Channel JFETs. These devices are engineered for sensitive amplifier stages and mid-frequency designs. The family includes various package options such as TO-72, TO-92, and SOT-23, catering to both through-hole and surface-mount manufacturing processes.

Replacement Considerations

Direct substitutes within the same family include the SMP4221TR. Verify pinout compatibility and electrical parameter alignment before substitution.