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Product Detailed Parameters
- Description：DIODE VARACTOR 15V 20MA SC79
- Series：-
- Mfr：Skyworks Solutions Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Capacitance @ Vr, F：3.6pF @ 6V, 50MHz
- Capacitance Ratio：3.4
- Capacitance Ratio Condition：C1/C6
- Voltage - Peak Reverse (Max)：15 V
- Diode Type：Single
- Q @ Vr, F：-
- Operating Temperature：-55°C ~ 125°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：SC-79, SOD-523
- Supplier Device Package：SC-79
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Overview
The SMV1235-079LF is a silicon hyperabrupt junction tuning varactor diode from the Skyworks SMV123x series, housed in an SC-79 package with a parasitic series inductance of 0.7 nH. It features a minimum reverse voltage rating of 15 V and a maximum forward current of 20 mA. Typical capacitance values are 12.65 pF at 1 V and 6.40 pF at 3 V. The device exhibits a typical capacitance ratio of 2.0 (CT@1V/CT@6V) and a series resistance of 0.60 Ω at 3 V and 500 MHz. Operating temperature ranges from -55 °C to +125 °C.
Feature Summary
- Hyperabrupt junction design optimized for low tuning voltage Voltage Controlled Oscillators (VCOs).
- Low series resistance characteristics suitable for high-Q resonators in wireless systems operating above 10 GHz.
- Rated for Moisture Sensitivity Level 1 (MSL1) and compatible with lead-free soldering up to 260 °C.
Applications
- Low tuning voltage Voltage Controlled Oscillators (VCOs)
- High-Q resonators in wireless system VCOs
- High-volume commercial RF systems
Procurement Notes
Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance and lead-free status via official datasheets. Check for recent Product Discontinuation Notifications regarding end-of-life status before finalizing procurement plans.
Selection Notes
Select this component based on required capacitance ratios and series resistance limits for specific VCO designs. Ensure the 15 V reverse voltage rating accommodates the maximum tuning voltage requirements. Verify that the SC-79 package dimensions align with the target PCB layout constraints.
Part Context
The SMV1235-079LF belongs to the SMV123x family of hyperabrupt junction varactors designed for RF tuning applications. This series includes variants with different capacitance values and package options such as SOD-323 and SOT-23, all sharing similar electrical performance profiles tailored for low phase noise oscillator circuits.
Replacement Considerations
SMV1234-079LF offers lower capacitance with higher series resistance. SMV1236-079LF provides higher capacitance with comparable series resistance. Both maintain the same SC-79 package and electrical ratings within the SMV123x series.
FAQ
What is the typical capacitance ratio for the SMV1235-079LF?
The typical capacitance ratio (CT@1V / CT@6V) is 2.0.
What is the maximum reverse voltage rating?
The absolute maximum reverse voltage rating is 15 V.
Is the SMV1235-079LF RoHS compliant?
Yes, the 'LF' suffix indicates a lead-free, RoHS-compliant package.
