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Product Detailed Parameters
- Description：SC-79 N-TYPE SINGLE LEAD FREE
- Series：SMV1231
- Mfr：Skyworks Solutions Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Capacitance @ Vr, F：0.61pF @ 6V, 500MHz
- Capacitance Ratio：2.8
- Capacitance Ratio Condition：C1/C6
- Voltage - Peak Reverse (Max)：15 V
- Diode Type：Single
- Q @ Vr, F：-
- Operating Temperature：-55°C ~ 125°C
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：SC-79, SOD-523
- Supplier Device Package：SC-79
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Overview
The SMV1231-079LF is a silicon hyperabrupt junction tuning varactor diode from the Skyworks SMV123x series, housed in an SC-79 surface-mount package. It features a typical capacitance of 1.58 pF at 1 V reverse bias and a maximum reverse voltage rating of 15 V. The device exhibits a low series resistance of 2.90 Ω at 3 V and 500 MHz, supporting high-Q resonator applications. Operating temperatures range from -55 °C to +125 °C, with a storage temperature limit of +150 °C. The component includes a parasitic series inductance (Ls) of 0.7 nH.
Feature Summary
- Designed for Voltage Controlled Oscillators (VCOs) requiring low tuning voltage operation.
- Low series resistance facilitates high-Q resonators in wireless systems operating above 10 GHz.
- Characterized for capacitance and resistance variations over the full operating temperature range.
Applications
- Low tuning voltage Voltage Controlled Oscillators (VCOs)
- High-Q resonators in wireless system VCOs
- High-volume commercial RF systems
Procurement Notes
Verify the specific ordering suffix '-079' against current Skyworks documentation to confirm the SC-79 package configuration. Confirm RoHS compliance status as lead-free variants are standard. Check for Moisture Sensitivity Level 1 (MSL1) handling requirements prior to soldering. Ensure ESD precautions are followed during assembly.
Selection Notes
Select this component when a low capacitance value near 1.6 pF is required for high-frequency tuning. The SC-79 package provides a compact footprint suitable for dense PCB layouts. Verify that the 15 V reverse voltage rating meets the circuit's peak reverse bias requirements. Consider the 0.7 nH series inductance impact on impedance matching networks.
Part Context
The SMV1231-079LF belongs to the SMV123x family of hyperabrupt junction varactors. This series offers various capacitance ratios and values across different part numbers within the same SC-79, SOD-323, and SOT-23 packages. The '079' suffix specifically denotes the SC-79 Green™ package variant with defined marking codes.
Replacement Considerations
No direct public substitute part numbers are documented for the SMV1231-079LF in the provided datasheet or local source material. Designers should evaluate other members of the SMV123x series if capacitance adjustments are permissible.
