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Product Detailed Parameters
- Description：DIODE VARACTOR 30V 20MA SC79
- Series：-
- Mfr：Skyworks Solutions Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Capacitance @ Vr, F：2.89pF @ 28V, 1MHz
- Capacitance Ratio：22
- Capacitance Ratio Condition：C1/C28
- Voltage - Peak Reverse (Max)：30 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 SMV1801-079LF is a silicon hyperabrupt junction tuning varactor diode designed for battery-operated wireless systems. It operates within a reverse voltage range of 0 to 30 V and supports frequencies up to 2.5 GHz. Key electrical specifications include a maximum reverse current of 10 nA at 30 V, a series resistance of 1.2 Ω at 470 MHz, and a breakdown voltage of 32 V. The device provides a capacitance ratio of 22.0 (C1/C28) and features an ultra-small SC-79 package with an inductance of 0.7 nH.
Feature Summary
- Cross-compatible with NXP BB182
- Low series resistance for improved performance
- High capacitance ratio suitable for wide tuning ranges
- Ultra-small SC-79 surface mount package
Applications
- VHF TV tuners
- Voltage-controlled oscillators (VCOs)
- Low-noise UHF and VHF VCOs for GSM, PCS, CDMA, and analog phones
Procurement Notes
Verify the component status before procurement as availability may vary. Confirm that the ordering suffix matches the required lead-free RoHS compliance standard. Ensure proper ESD precautions are observed during handling and storage to prevent damage to the sensitive semiconductor junction.
Selection Notes
Select this component when a high capacitance ratio and low series resistance are required for low phase noise applications. Verify that the operating frequency does not exceed 2.5 GHz and that the reverse voltage requirements align with the 30 V maximum rating. Consider the SC-79 package dimensions for PCB layout constraints.
Part Context
This part belongs to Skyworks Solutions' hyperabrupt junction varactor diode family. It is specifically engineered for wireless communication systems requiring precise frequency tuning. The device utilizes a silicon substrate and is packaged in the compact SC-79 form factor to support miniaturized electronic designs.
Replacement Considerations
The datasheet explicitly states cross-compatibility with NXP's BB182. Verify pinout alignment and electrical parameter tolerances before substitution. No other substitute part numbers are documented in the provided source material.
FAQ
What is the maximum reverse voltage rating for the SMV1801-079LF?
The absolute maximum reverse voltage rating is 30 V.
What is the typical capacitance ratio specified for this varactor?
The typical capacitance ratio is 22.0, measured as C1/C28.
Is the SMV1801-079LF compatible with lead-free soldering processes?
Yes, the device is rated for lead-free soldering and meets Moisture Sensitivity Level 1 (MSL1) at 260 °C per JEDEC J-STD-020.
