SMV1800-079LF

Overview

The SMV1800-079LF is a silicon hyperabrupt junction tuning varactor diode designed for battery-operated wireless systems. It operates with a maximum reverse voltage of 30 V and features a typical capacitance ratio of 16 (measured at 0.5 V to 28 V). The device exhibits a series resistance of 3 Ω at 470 MHz and 1.5 V reverse bias, supporting frequencies up to and above 2.5 GHz. Packaged in an ultra-small SC-79 form factor, it offers low parasitic inductance of 0.7 nH.

Feature Summary

• Cross-compatible with NXP BB181 specifications
• Optimized for low phase noise Voltage-Controlled Oscillators (VCOs)
• Ultra-small SC-79 package suitable for space-constrained designs

Applications

• Low-noise and wideband UHF and VHF VCOs
• Satellite tuners
• Tunable couplings
• Wireless systems including GSM, PCS, and CDMA

Procurement Notes

Verify the component status as the datasheet is dated November 2012. Confirm RoHS compliance and lead-free packaging requirements against current project standards. Ensure ESD precautions are followed during handling, as the device is sensitive to electrostatic discharge.

Selection Notes

Select this component when a high capacitance ratio and low series resistance are required for VCO applications. Verify that the 30 V reverse voltage rating meets the circuit's peak reverse voltage requirements. Consider the SC-79 package dimensions for PCB layout constraints.

Part Context

This part belongs to Skyworks' hyperabrupt junction varactor family, specifically engineered for frequency tuning in RF circuits. The SMV1800-079LF variant utilizes the SC-79 surface-mount package, providing a compact solution for modern wireless communication devices requiring precise frequency control.

Replacement Considerations

The datasheet explicitly states cross-compatibility with NXP’s BB181. Verify pinout and electrical parameters before substitution. No other specific replacement part numbers are documented in the provided source material.