BB148,135

Overview

The BB148,135 is a VHF variable capacitance diode fabricated in planar technology and encapsulated in the SOD323 (SC-76) very small SMD plastic package. It features excellent matching characteristics suitable for precision tuning applications. Key electrical parameters include a maximum reverse voltage of 30V and a capacitance ratio of 15.0 defined as C1/C28. The device operates within a junction temperature range of -55°C to 125°C. Capacitance values are specified at 1MHz, with typical minimum capacitance around 41.8 pF and maximum capacitance approximately 2.75 pF at 28V.

Feature Summary

• Fabricated using planar technology for consistent performance
• Encapsulated in the compact SOD323 (SC-76) surface-mount package
• Provides excellent capacitance matching for precise circuit tuning

Applications

• VHF frequency tuning circuits
• Voltage-controlled oscillator (VCO) varactor applications
• RF filter tuning networks

Procurement Notes

Verify the specific ordering suffix, such as 115 or 135, against your bill of materials, as these indicate different packaging configurations like tape and reel quantities. Confirm that the component status is acceptable for your production timeline, as some variants may be marked obsolete. Ensure the SOD323 package footprint matches your PCB design constraints before finalizing procurement orders.

Selection Notes

Select this component when a high capacitance ratio is required for wide tuning ranges in VHF bands. The SC-76 package is ideal for space-constrained designs requiring surface-mount assembly. Consider the 30V reverse voltage rating to ensure adequate headroom for your biasing conditions. Verify that the operating temperature range meets the environmental requirements of the target application.

Part Context

This part belongs to NXP's family of variable capacitance diodes designed for RF and microwave applications. These diodes utilize silicon planar technology to provide stable and predictable capacitance variation with applied reverse voltage. The BB148 series specifically targets VHF band operations, offering a balance between capacitance density and tuning linearity for communication and broadcasting equipment.

Replacement Considerations

Check for direct substitutes within the same NXP BB series, such as the BB149 for UHF applications if frequency requirements change. Ensure any replacement maintains the SOD323 package and similar capacitance ratios. Verify that alternative parts meet the same 30V reverse voltage and temperature specifications.