BB179,335

Overview

The NXP BB179,335 is a planar technology variable capacitance diode designed for UHF tuner applications. It provides excellent matching performance with a tolerance of 2% DMA and features low series resistance to ensure great linearity. The device is suitable for Voltage Controlled Oscillators (VCO) and electronic tuning circuits in the UHF band. Key electrical characteristics include a capacitance value (C28) of 2.1 pF with a ratio of 9. This component supports precise frequency control in high-frequency signal processing systems.

Feature Summary

• Planar technology construction for reliable performance
• Excellent capacitance matching within 2% DMA tolerance
• Low series resistance for minimal signal loss
• High linearity for accurate voltage-controlled oscillation

Applications

• Voltage Controlled Oscillators (VCO)
• Electronic tuning in UHF tuners
• RF circuit frequency adjustment

Procurement Notes

Verify the specific suffix '335' against official NXP documentation to confirm tape-and-reel packaging specifications and quantity per reel. Ensure compatibility with UHF design requirements by checking datasheet parameters for C28 and ratio values before procurement.

Selection Notes

Select this component when designing UHF tuners requiring precise capacitance matching and low series resistance. Consider the 2.1 pF C28 value and 9 ratio for VCO stability. Verify package type and thermal characteristics against board layout constraints.

Part Context

The BB179 belongs to NXP's legacy UHF variable capacitance diode family, often referenced in RF manual editions. It serves as a fundamental component for frequency synthesis and tuning in broadcast and communication equipment, offering a balance of linearity and matching precision.

Replacement Considerations

Check NXP RF manuals for equivalent models such as BB146 or BB149 if pinout or electrical parameters differ. Verify that substitute diodes maintain the required 2% DMA matching and UHF operational range.