BB184,115

Overview

The BB184,115 is a silicon varactor diode manufactured by NXP Semiconductors. It is designed for RF tuning applications in VHF and UHF frequency bands. The device features a single PN junction with a capacitance range typically spanning from approximately 2 pF to 30 pF, depending on the applied reverse bias voltage. Key electrical parameters include a maximum reverse voltage rating of 30 V and a low series resistance to minimize insertion loss. The component is housed in a compact surface-mount package, specifically the SOD57 (SC-90) outline, facilitating automated assembly and integration into space-constrained circuit boards.

Feature Summary

• Provides variable capacitance for resonant circuit tuning
• Optimized for low-loss RF signal paths
• Capable of operation in high-frequency VHF/UHF ranges

Applications

• RF oscillator tuning circuits
• Voltage-controlled filters (VCF)
• Impedance matching networks in transceivers

Procurement Notes

Verify the specific suffix '115' against the official NXP datasheet to confirm the exact packaging type and tape/reel specifications. Ensure the component meets RoHS compliance requirements if mandated by the target application standards. Cross-reference the ordering code with current availability status as legacy components may have limited supply chains.

Selection Notes

Select this component based on the required capacitance ratio and Q-factor at the operating frequency. Evaluate the parasitic series resistance impact on circuit efficiency. Confirm that the package dimensions align with the PCB footprint design rules and that the thermal characteristics are suitable for the expected power dissipation levels in the final assembly.

Part Context

This component belongs to the family of silicon varactor diodes used for electronic tuning. It serves as a critical passive element in analog RF front-ends, replacing mechanical capacitors for dynamic frequency adjustment. Its performance is defined by the non-linear capacitance-voltage characteristic, enabling precise control over resonant frequencies in communication systems.

Replacement Considerations

Consult the official replacement guide for equivalent varactor diodes with similar C-V curves and voltage ratings. Verify pin compatibility and package dimensions before substituting with alternative manufacturers' parts to ensure seamless integration without redesigning the PCB layout.