MMVL109T1G Equivalent & Substitute Parts

Part Overview

The MMVL109T1G is a varactor diode manufactured by onsemi, designed for tuning applications with a peak reverse voltage rating of 30 V. This component is packaged in SOD-323 surface mount configuration and operates across the temperature range of -55°C to 150°C. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing design support and procurement.

Substiute Parts

MMVL109T1G

onsemiIn Stock: 1052MMVL109T1G Datasheet

Current PartRFQ

BB131,135

NXP USA Inc.In Stock: 883BB131,135 Datasheet

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BB135,135

NXP USA Inc.In Stock: 1022BB135,135 Datasheet

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BB170X

NXP USA Inc.In Stock: 6269BB170X Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the MMVL109T1G is determined by the following critical parameters:

• Voltage Rating: All substitutes must maintain the 30 V peak reverse voltage specification
• Package Type: All substitutes must use SOD-323 surface mount packaging for mechanical and electrical compatibility
• Diode Configuration: All substitutes must be single varactor diodes
• Capacitance Characteristics: Substitutes must operate within acceptable capacitance ranges and ratios for tuning circuit applications
• Temperature Range: Operating temperature capability must support the application requirements
• Compliance Status: RoHS and REACH compliance status must be verified for regulatory requirements

Three active or recently active NXP USA Inc. varactor diodes meet these substitution criteria: BB131, BB135, and BB170X. Each maintains the 30 V voltage rating and SOD-323 package specification while offering different capacitance characteristics suitable for various tuning frequency ranges.

Parameter Comparison

Engineering Selection Recommendations

BB135 and BB170X are the preferred substitutes for new designs and ongoing procurement due to their active product status. Both components are ROHS3 compliant and maintain full regulatory compliance. BB135 offers a capacitance ratio of 12, while BB170X provides a ratio of 15, allowing selection based on specific tuning frequency requirements.

BB131 remains a valid electrical substitute with a capacitance ratio of 16, though its obsolete status may limit long-term availability. This part is suitable for legacy system maintenance where existing inventory exists.

All three substitutes maintain the 30 V voltage rating and SOD-323 package specification required for direct mechanical and electrical compatibility. The primary design consideration is capacitance value selection based on the target tuning frequency range of the application circuit.

Frequently Asked Questions (FAQ)

Q: Can BB135 or BB170X be used as direct replacements for MMVL109T1G?

A: Yes, both BB135 and BB170X are electrically and mechanically compatible substitutes. They share the same 30 V voltage rating, SOD-323 package, and single varactor diode configuration. Selection between them depends on the required capacitance ratio for your specific tuning circuit.

Q: What is the difference between BB135 and BB170X?

A: The primary difference is capacitance ratio: BB135 provides a ratio of 12 (C0.5/C28), while BB170X provides a ratio of 15 (C1/C28). BB170X also has higher inventory availability. Choose based on your circuit's tuning range requirements.

Q: Why is the operating temperature range different between MMVL109T1G and the substitutes?

A: MMVL109T1G operates to 150°C, while BB131, BB135, and BB170X operate to 125°C. If your application requires operation above 125°C, these substitutes may not be suitable. Verify your circuit's maximum junction temperature requirement.

Q: Are all substitutes RoHS compliant?

A: BB131, BB135, and BB170X are all ROHS3 compliant. MMVL109T1G's RoHS status is not specified in available documentation. All four parts maintain REACH Unaffected status.

Q: Which substitute has the best long-term availability?

A: BB135 and BB170X both have active product status, ensuring better long-term availability compared to the obsolete MMVL109T1G and BB131. BB170X currently has higher inventory levels (6200 pcs).