SMV1705-079LF Skyworks Varactor Diode (Small Outline Diode Flat Lead) In Stock
Skyworks SMV1705-079LF is a low-noise silicon variable capacitance (varactor) diode in the SC-79 2-pin package with 18.3pF nominal capacitance, 2.8 minimum capacitance ratio, and 12V minimum breakdown voltage. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Skyworks
- Package
- Small Outline Diode Flat Lead
- Pin Count
- 2
- Lifecycle
- END OF LIFE
- Datasheet
- SMV1705-079LF Datasheet PDF
- Category
- Varactor Diode
- Price
- From $1.9118(MOQ 19)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SMV1705-079LF?
- 18.3pF nominal capacitance with ±5.46% tolerance for precise voltage-controlled tuning in VCO circuits
- Minimum capacitance ratio of 2.8 enabling wide tuning range in RF oscillator and PLL designs
- Low-noise silicon varactor construction minimizing phase noise in VHF and UHF frequency synthesizers
- Compact SC-79 2-pin package (1.2mm × 0.8mm) for space-constrained RF PCB layouts
- 12V minimum breakdown voltage providing reliable operation in standard RF bias networks
What is SMV1705-079LF used for?
The SMV1705-079LF is designed for voltage-controlled oscillator (VCO) tuning, phase-locked loop (PLL) filter networks, and frequency agile RF circuit designs operating in VHF and UHF bands. Its 18.3pF capacitance and 2.8:1 capacitance ratio allow broad frequency tuning with a single varactor in resonator tanks, reducing component count in compact wireless modules. This varactor diode is specified in FM tuner front ends, satellite receiver circuits, and narrowband RF transceiver designs where low phase noise and reliable silicon performance are critical.
What are the specifications of SMV1705-079LF?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Additional Feature | LOW NOISE |
| Breakdown Voltage-Min | 12V |
| Configuration | SINGLE |
| Diode Cap Tolerance | 5.46% |
| Diode Capacitance Ratio-Min | 2.8 |
| Diode Capacitance-Nom | 18.3pF |
| Diode Element Material | SILICON |
| Diode Type | VARIABLE CAPACITANCE DIODE |
| Frequency Band | S BAND |
| JESD-30 Code | R-PDSO-F2 |
| JESD-609 Code | e3 |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Dissipation-Max | 0.25W |
| Qualification Status | Not Qualified |
| Rep Pk Reverse Voltage-Max | 12V |
| Surface Mount | YES |
| Terminal Finish | MATTE TIN |
| Terminal Form | FLAT |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Variable Capacitance Diode Classification | HYPERABRUPT |
| Package | Small Outline Diode Flat Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.80 |
Where can I find the SMV1705-079LF datasheet?
SMV1705-079LF Datasheet DownloadOfficial datasheet from Skyworks
What are equivalent replacements for SMV1705-079LF?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What tuning range can the SMV1705-079LF achieve in a typical VCO resonator tank circuit?
With a nominal capacitance of 18.3pF and a minimum capacitance ratio of 2.8, the SMV1705-079LF can tune resonator tank circuits over a frequency ratio of approximately sqrt(2.8) ≈ 1.67, meaning a VCO centered at 100 MHz could cover roughly 60 MHz to 167 MHz with appropriate coil selection. The exact tuning range depends on the parallel inductance and additional fixed capacitance in the tank network.
How does the low-noise characteristic of the SMV1705-079LF benefit PLL synthesizer phase noise performance?
The SMV1705-079LF is specifically characterized as a low-noise varactor, meaning its series resistance and thermal noise contribution are minimized compared to standard varactor diodes. In PLL synthesizers operating at 400 MHz to 2.4 GHz, lower varactor series resistance reduces in-band phase noise by 3dB to 6dB, improving receiver selectivity and transmitter spectral purity in narrowband wireless applications.
Why is the SC-79 package of the SMV1705-079LF advantageous for RF PCB layouts?
The SC-79 package measures approximately 1.2mm × 0.8mm, making it one of the smallest 2-pin SOD-form packages available, which minimizes parasitic lead inductance in the range of 0.3nH to 0.5nH. This low parasitic inductance allows the SMV1705-079LF to maintain accurate varactor behavior at VHF and UHF frequencies above 300 MHz, where larger SOD-123 or DO-35 packages would introduce significant series inductance errors.
What reverse bias voltage range should be used to exploit the SMV1705-079LF capacitance tuning characteristic?
The SMV1705-079LF has a minimum breakdown voltage of 12V, allowing reverse bias tuning voltages from approximately 0.5V to 8V or 9V before approaching breakdown. Most varactor tuning circuits apply 1V to 6V reverse bias to sweep through the 18.3pF nominal down to below 7pF capacitance, well within the safe operating range. Exceeding 10V reverse bias approaches the 12V breakdown floor and should be avoided in production designs.
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About Skyworks
Skyworks is a leading electronic component manufacturer. FindMyChip sources Skyworks ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 19+ | $2.1000 | $39.90 |
| 50+ | $2.0896 | $104.48 |
| 150+ | $2.0007 | $300.11 |
| 250+ | $1.9118 | $477.95 |
In Stock · 24h Response · Worldwide Shipping
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