BB208-02,115

Overview

The BB208-02 is a planar technology variable capacitance diode housed in an SOD523 (SC-79) ultra-small surface-mount plastic package. It features a continuous reverse voltage rating of 10 V and a maximum operating junction temperature of +125 °C. Electrical characteristics at Tj = 25 °C include a typical diode capacitance of 19.9 pF at VR = 1 V, decreasing to 4.5–5.4 pF at VR = 7.5 V. The device exhibits a low series resistance of 0.35 Ω typ at f = 100 MHz and VR = 3 V. Reverse current is limited to 10 nA at VR = 10 V. The capacitance ratio Cd(1V)/Cd(7.5V) ranges from 3.7 to 5.2.

Feature Summary

• Ultra-small SMD plastic packaging for space-constrained designs
• Very low series resistance for efficient RF performance
• Excellent CV linearity with high capacitance tuning ratios

Applications

• Voltage Controlled Oscillators (VCO)
• Voltage Controlled Crystal Oscillators (VCXO)
• Temperature Controlled Crystal Oscillators (TCXO)

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm tape-and-reel quantities and marking codes. Confirm that the component status remains active or qualified for production before finalizing design-in decisions. Ensure compliance with RoHS directives if required by the target application specifications.

Selection Notes

Select this component when minimal footprint area is critical due to its SOD523 package dimensions. Evaluate the capacitance range requirements against the specified 19.9 pF to 4.5 pF span. Consider the low series resistance benefit for high-frequency applications where signal loss must be minimized within the oscillator circuit topology.

Part Context

This part belongs to NXP Semiconductors' discrete varactor diode portfolio designed for low-voltage RF tuning applications. It shares functional similarities with the BB208-03 but utilizes a different physical package outline. The product data sheet defines it as a standard planar technology device suitable for general-purpose frequency control circuits.

Replacement Considerations

The BB208-03 serves as a package variant within the same family, offering identical electrical characteristics in an SOD323 outline. Verify pin compatibility and mechanical envelope constraints before substituting between these two specific package types.