BB189,115

Overview

The BB189 is a planar technology variable capacitance diode housed in an SOD523 ultra-small leadless plastic surface-mounted device package. It features excellent linearity and matching performance achieved through Direct Matching Assembly, with a capacitance ratio of at least 6.3 between 2 V and 25 V reverse bias. The device exhibits low series resistance and minimal reverse current. Key electrical characteristics include a typical capacitance of 14.15 pF to 15.75 pF at 2 V and 1.89 pF to 2.18 pF at 25 V, measured at 1 MHz. The maximum reverse voltage rating is 32 V, and the junction temperature range extends from -55 °C to +125 °C.

Feature Summary

• Excellent linearity for signal integrity
• High precision matching via Direct Matching Assembly procedure
• Ultra-small leadless plastic SMD package design

Applications

• Voltage Controlled Oscillators (VCO)
• Electronic tuning in UHF television tuners

Procurement Notes

Verify the specific ordering suffix and package variant when sourcing components. Confirm that the received units match the SOD523 package outline and marking codes specified in the official datasheet. Ensure storage conditions remain within the defined temperature limits to maintain component reliability before assembly.

Selection Notes

Select this component for applications requiring precise capacitance tuning in high-frequency circuits. The tight matching tolerance makes it suitable for balanced circuit designs where component consistency is critical. Evaluate the low series resistance and high capacitance ratio to ensure compatibility with the target oscillator frequency range and tuning sensitivity requirements.

Part Context

This component belongs to NXP Semiconductors' portfolio of UHF variable capacitance diodes designed for RF tuning applications. It utilizes planar technology to achieve stable performance across varying temperatures. The device is intended for integration into compact electronic systems where space constraints necessitate small form-factor packages while maintaining high electrical precision.

Replacement Considerations

Consult official replacement lists or cross-reference guides provided by NXP Semiconductors for verified substitute part numbers. Do not assume functional equivalence with other variable capacitance diodes without verifying pinout, package dimensions, and electrical specifications against the original datasheet.