SMV2019-079LF

Overview

The SMV2019-079LF is a silicon hyperabrupt junction tuning varactor diode from Skyworks Solutions, packaged in the SC-79 (SOD-523) form factor. It features a maximum reverse voltage of 22 V and a typical capacitance ratio of 2.30 at 4 V to 20 V. The device exhibits a typical Q factor of 500 at 4 V and 50 MHz, with a series resistance of 0.07 Ω and an inductance of 0.7 nH. Operating temperatures range from -55 °C to +125 °C.

Feature Summary

• Low series resistance for efficient RF signal handling
• High capacitance ratio at low reverse voltages
• Moisture sensitivity level 1 rated for 260 °C soldering

Applications

• Low phase noise VCOs in wireless systems
• RF and microwave VCOs
• Phase shifters

Procurement Notes

Verify component authenticity through authorized Skyworks channels or certified distributors. Confirm RoHS compliance and lead-free status via official documentation. Ensure storage conditions adhere to MSL1 guidelines to prevent moisture absorption prior to solder assembly.

Selection Notes

Select this component when designing circuits requiring minimal parasitic inductance and low series resistance. The SC-79 package suits space-constrained surface mount layouts. Verify that the required capacitance tuning range aligns with the specified 0.26 pF to 0.95 pF limits across the operating voltage.

Part Context

This part belongs to the SMV2019 to SMV2023 series of hyperabrupt junction tuning varactors. While sharing similar electrical characteristics and packaging options, specific variants differ in nominal capacitance values and package types such as SOT-23 or SOD-882.

Replacement Considerations

SMV2019-040LF serves as a direct functional substitute within the same series, differing primarily by its SOD-323 package and lower parasitic inductance of 0.45 nH compared to the 0.7 nH found in the SMV2019-079LF.