BB173X

Overview

The BB173X is a variable capacitance diode fabricated in planar technology and encapsulated in the SOD523 (SC-79) very small SMD plastic package. It is designed for VHF applications with a maximum reverse voltage of 32V and a maximum forward current of 20mA. The device exhibits a capacitance of 2.754pF at 28V reverse bias measured at 1MHz, with a capacitance ratio of 15.0.

Feature Summary

• Planar technology fabrication
• Very small SMD plastic package
• Single diode configuration

Applications

• VHF variable capacitance circuits

Procurement Notes

Verify component status as the BB173X is listed as obsolete by NXP Semiconductors. Check last time buy dates and lead times through authorized distributors. Confirm RoHS compliance and packaging details such as reel or tape specifications before ordering. Ensure availability aligns with production requirements due to end-of-life status.

Selection Notes

Select this component for VHF applications requiring a single varactor diode in an SOD523 package. Consider the 32V reverse voltage limit and 20mA forward current rating. Evaluate the capacitance characteristics at specific bias voltages for circuit tuning needs. Verify compatibility with existing PCB footprints and assembly processes.

Part Context

The BB173X belongs to NXP's portfolio of variable capacitance diodes, commonly known as varactors or varicap diodes. These components are essential for frequency tuning and voltage-controlled oscillators in radio frequency circuits. The SOD523 package offers space-saving benefits for compact electronic designs.

Replacement Considerations

As the BB173X is obsolete, identify alternative varactor diodes from NXP or other manufacturers with similar electrical specifications and package dimensions. Ensure replacement parts meet the required voltage, current, and capacitance ratio parameters for VHF applications.