BB149,115

Overview

The BB149,115 is a UHF variable capacitance diode fabricated using planar technology and encapsulated in the SOD323 plastic surface-mount device package. It features excellent linearity and high matching precision achieved through gliding matching and direct assembly procedures. The component provides a capacitance ratio of 9 at 28 V reverse bias with a capacitance value of 2.1 pF. It exhibits low series resistance and is designed for electronic tuning applications in UHF television tuners and voltage-controlled oscillators.

Feature Summary

• Excellent linearity characteristics
• High matching precision to 1% DMA
• Compact SOD323 plastic SMD package

Applications

• Electronic tuning in UHF television tuners
• Voltage-controlled oscillators (VCO)

Procurement Notes

Verify current manufacturing status as the base part number BB145 is listed as no longer manufactured. Confirm availability of the specific BB149,115 variant through authorized distributors. Check material declaration and RoHS compliance data sheets prior to ordering. Ensure design-in compatibility with existing supply chains given potential end-of-life transitions.

Selection Notes

Select this component for UHF frequency applications requiring precise capacitance tuning. Consider the unmatched BB159 if strict matching tolerances are not required. Evaluate the SOD323 package size constraints against board space limitations. Verify thermal and electrical requirements align with the low series resistance specifications.

Part Context

This component belongs to NXP's portfolio of UHF variable capacitance diodes. It shares functional similarities with other variants such as the BB146, BB149A, and BB159. These devices are commonly utilized in RF front-end circuits where stable varactor performance is critical for signal integrity and tuning accuracy.

Replacement Considerations

The BB159 serves as an unmatched alternative with identical electrical specifications but without tight tolerance requirements. Other similar UHF varactors include the BB135 and BB146. Verify pinout and package compatibility before substituting.