BF244C

Overview

The BF244C is an N-channel RF JFET designed for amplifier and mixer applications up to 450 MHz. It features a maximum drain current of 50 mA, a gate-source breakdown voltage of 30 V, and total device dissipation of 350 mW. The zero-gate voltage drain current ranges from 12 to 25 mA. Forward transfer admittance reaches 6.5 mmhos at 200 MHz, with a cut-off frequency of 700 MHz. Input capacitance is 3.0 pF, and the noise figure is 1.5 dB at 100 MHz. Operating temperature spans -55°C to +150°C.

Feature Summary

• Optimized for RF amplifier and mixer operations in the UHF band
• Low input and reverse transfer capacitance for high-frequency performance
• High cut-off frequency supporting signal processing up to 700 MHz
• Designed for analog switching requiring low capacitance

Applications

• RF amplifiers operating up to 450 MHz
• Mixer circuits in radio frequency systems
• Analog switching applications requiring low capacitance

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status via official documentation. Check for obsolete status as the datasheet indicates discontinuation by Fairchild Semiconductor. Ensure storage and handling procedures align with specified temperature ranges to maintain device integrity.

Selection Notes

Select the BF244C when designing circuits requiring N-channel JFETs for frequencies up to 450 MHz. Consider the 30 V breakdown voltage and 50 mA drain current limits for power management. Evaluate the 1.5 dB noise figure for sensitive receiver stages. Compare forward transfer admittance specifications against circuit gain requirements.

Part Context

The BF244C belongs to the BF244 series, which includes BF244A and BF244B variants differentiated primarily by zero-gate voltage drain current thresholds. Originally manufactured by Fairchild Semiconductor, the product line has been discontinued. The device utilizes silicon technology and is housed in a TO-92 package.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.

FAQ

What is the maximum operating frequency for the BF244C?

The BF244C is designed for applications operating up to 450 MHz, with a cut-off frequency (F(Yfs)) of 700 MHz.

What is the typical noise figure of the BF244C?

The noise figure is typically 1.5 dB when measured at VDS = 15 V, VGS = 0, RG = 1.0 kΩ, and f = 100 MHz.

What is the maximum drain current rating?

The absolute maximum drain current (ID) is rated at 50 mA.