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Product Detailed Parameters
- Description：DIODE TUNING SS 30V SOT-23
- Series：-
- Mfr：onsemi
- Package：Tape & Reel (TR)
- Capacitance @ Vr, F：32pF @ 3V, 1MHz
- Capacitance Ratio：6.5
- Capacitance Ratio Condition：C3/C25
- Voltage - Peak Reverse (Max)：30 V
- Diode Type：Single
- Q @ Vr, F：200 @ 3V, 50MHz
- Operating Temperature：125°C (TJ)
- Grade：-
- Qualification：-
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3 (TO-236)
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Overview
The MMBV109LT3 is a silicon varactor diode from onsemi, packaged in SOT-23. It serves as a solid-state replacement for mechanical tuning elements in VHF frequency control applications. Key electrical parameters include a reverse voltage rating of 30 Vdc and a forward current capacity of 200 mAdc. At 25°C, the device exhibits a capacitance range of 26 to 32 pF at 3.0 Vdc and 1.0 MHz. The figure of merit is guaranteed to be a minimum of 200 at 50 MHz. Power dissipation is rated at 200 mW at 25°C ambient temperature.
Feature Summary
- High Q factor with guaranteed minimum values at VHF frequencies
- Controlled and uniform tuning ratio for precise frequency control
- Designed for general frequency control and tuning applications
Applications
- General frequency control circuits
- Voltage-controlled tuning applications
- Solid-state replacement for mechanical tuning methods
Procurement Notes
Verify the specific ordering suffix against official documentation to confirm package type and shipping quantity. Confirm RoHS compliance status if required by design specifications. Ensure the selected variant matches the intended surface mount or through-hole manufacturing process requirements.
Selection Notes
Select based on required capacitance range and operating frequency. Verify that the maximum reverse voltage and power dissipation ratings accommodate the circuit's peak conditions. Consider thermal derating factors for high ambient temperature environments.
Part Context
This component belongs to the Silicon Epicap Diodes series designed for VHF applications. It is part of a family offering both surface mount (SOT-23) and through-hole (TO-92) packages to suit different assembly needs.
Replacement Considerations
The MV209 is a documented alternative within the same datasheet, utilizing a TO-92 package instead of SOT-23. Verify pinout compatibility and physical footprint constraints before substitution.
FAQ
What is the typical capacitance value of the MMBV109LT3?
The typical capacitance is 29 pF when measured at 3.0 Vdc and 1.0 MHz.
How does the capacitance ratio vary?
The capacitance ratio (C3/C25) typically ranges from 5.0 to 6.5 at 1.0 MHz.
What is the maximum forward current rating?
The maximum forward current (IF) is rated at 200 mAdc.
