SMV1235-001

Overview

The SMV1235-001 is a silicon hyperabrupt junction tuning varactor diode from the Skyworks SMV123x series, housed in an SOT-23 package with a series inductance of 1.5 nH. It features a typical capacitance of 6.4 pF at 3 V reverse bias and 12.65 pF at 1 V. The device supports a minimum reverse voltage of 15 V and operates within a temperature range of -55 °C to +125 °C. Electrical specifications include a maximum series resistance of 0.60 Ω at 500 MHz and 3 V, ensuring low phase noise performance for RF applications.

Feature Summary

• Hyperabrupt junction design optimized for low tuning voltage operation
• Low series resistance characteristics suitable for high-Q resonators
• Moisture Sensitivity Level 1 (MSL1) rated for 260 °C soldering

Applications

• Voltage Controlled Oscillators (VCOs)
• High-Q resonators in wireless system VCOs
• High-volume commercial systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for discontinuance notifications prior to procurement. Ensure storage conditions adhere to moisture sensitivity guidelines to prevent damage during solder assembly processes.

Selection Notes

Select this component when a capacitance value near 6.4 pF at 3 V is required for VCO designs. The SOT-23 package suits space-constrained layouts. Evaluate the 1.5 nH series inductance impact on circuit resonance frequency. Compare against other series members like SMV1234 or SMV1236 if different capacitance ranges are needed.

Part Context

This part belongs to the SMV123x family of surface mount plastic varactor diodes designed for RF and microwave applications. The series includes variants with different capacitance values and packaging options such as SC-70, SOD-323, and Green™ packages. All devices share similar electrical characteristics tailored for low phase noise performance.

Replacement Considerations

Direct substitutes within the same series include SMV1235-004, SMV1235-074, and SMV1235-079LF. These alternatives share identical electrical specifications but differ in packaging markings and lead-free compliance status.