MMBV2109LT1

Overview

The MMBV2109LT1 is a silicon voltage variable capacitance diode designed for FM radio and TV tuning applications. It operates with a reverse voltage of 30 Vdc and forward current of 200 mAdc. The device features a standard capacitance tolerance of 10% and is available in SOT-23 packages. Electrical characteristics include a reverse breakdown voltage of 30 Vdc, maximum reverse leakage current of 0.1 µA at 25 Vdc, and a typical diode capacitance temperature coefficient of 280 ppm/°C. Power dissipation is rated at 225 mW at 25°C ambient temperature.

Feature Summary

• High Q figure of merit for efficient frequency control
• Controlled and uniform tuning ratio across operating range
• Standard 10% capacitance tolerance for predictable circuit behavior

Applications

• FM Radio tuning circuits
• TV tuning and AFC systems
• General frequency control applications

Procurement Notes

Verify the specific ordering suffix to confirm package type and shipping configuration. Confirm RoHS compliance status if required by assembly specifications. Check for lead-free packaging indicators on the component marking. Validate that the device code matches the intended capacitance value before procurement.

Selection Notes

Select this component when a higher capacitance value near 33 pF is required compared to lower-capacitance variants in the series. Ensure the application operates within the 30 Vdc reverse voltage limit. Verify that the SOT-23 package dimensions fit the PCB layout constraints. Consider the power dissipation rating relative to the thermal environment.

Part Context

This part belongs to the MMBV2101LT1 Series, which includes various capacitance values ranging from 6.8 pF to 33 pF. The series provides solid-state reliability as a replacement for mechanical tuning methods. Other members include MMBV2101, MMBV2105, and MMBV2107, offering different capacitance options within the same package and electrical framework.

Replacement Considerations

MMBV2109L is the bulk-pack equivalent without the tape and reel suffix. MV2109 serves as the through-hole TO-92 alternative within the same series.