TC-25.000MDD-T MEMS Oscillator Equivalent & Substitute Parts

Part Overview

The TC-25.000MDD-T is a 25 MHz MEMS-based XO (Standard) oscillator manufactured by TXC CORPORATION. This component operates at 1.8V supply voltage with CMOS output and integrated Enable/Disable functionality, housed in a compact 4-SMD, No Lead surface mount package. The device is currently classified as obsolete, necessitating identification of functionally equivalent active alternatives to maintain design continuity and ensure supply chain availability for new production and legacy system support.

Substiute Parts

TC-25.000MDD-T

TXC CORPORATIONIn Stock: 1062TC-25.000MDD-T Datasheet

Current PartRFQ

FK2500065Z

Diodes IncorporatedIn Stock: 9254FK2500065Z Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC-25.000MDD-T is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 25 MHz (exact match required)
• Output Configuration: CMOS
• Supply Voltage: 1.8V
• Function: Enable/Disable capability
• Frequency Stability: ±25ppm
• Operating Temperature Range: -40°C ~ 85°C
• Package Type: 4-SMD, No Lead
• Physical Footprint: 0.126" L x 0.098" W (3.20mm x 2.50mm)
• Mounting Type: Surface Mount
• Moisture Sensitivity: MSL 1 or better

The FK2500065Z from Diodes Incorporated satisfies all mandatory matching parameters. While the base resonator technology differs (Crystal-based versus MEMS-based), both devices deliver identical electrical performance and physical compatibility within the specified parameter set. The substitute maintains full functional equivalence for circuit-level integration.

Parameter Comparison

Engineering Selection Recommendations

The FK2500065Z (Diodes Incorporated) is the qualified substitute for the obsolete TC-25.000MDD-T. Selection is based on the following engineering criteria:

Product Status Alignment: The TC-25.000MDD-T is classified as obsolete. The FK2500065Z maintains active product status with confirmed inventory availability (9244 units in stock), ensuring long-term supply chain viability.

Electrical Equivalence: Both devices deliver identical electrical performance across all specified parameters: 25 MHz frequency, 1.8V supply, CMOS output, Enable/Disable function, and ±25ppm frequency stability across the -40°C to 85°C operating range.

Physical Compatibility: The FK2500065Z maintains identical footprint dimensions (0.126" L x 0.098" W / 3.20mm x 2.50mm) and package type (4-SMD, No Lead). The seated height difference (0.045" versus 0.031") remains within typical PCB assembly tolerances and does not impact circuit functionality.

Regulatory Compliance: The FK2500065Z carries ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements. Both devices share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Resonator Technology Difference: While the TC-25.000MDD-T uses MEMS-based resonators and the FK2500065Z uses crystal-based resonators, this distinction does not affect electrical compatibility or circuit performance within the specified parameter envelope.

Frequently Asked Questions (FAQ)

Q: Can the FK2500065Z directly replace the TC-25.000MDD-T in existing designs?

A: Yes. The FK2500065Z provides direct electrical and physical compatibility. Both devices share identical frequency (25 MHz), output type (CMOS), supply voltage (1.8V), function (Enable/Disable), frequency stability (±25ppm), operating temperature range (-40°C to 85°C), and package footprint (4-SMD, No Lead, 3.20mm x 2.50mm). No circuit modifications are required.

Q: What is the significance of the height difference between these parts?

A: The TC-25.000MDD-T has a maximum seated height of 0.031" (0.80mm), while the FK2500065Z measures 0.045" (1.15mm). This 0.014" (0.35mm) difference is within standard PCB assembly clearance specifications and does not impact component placement, soldering, or circuit operation. Verify clearance in designs with height-constrained applications.

Q: Why does the TC-25.000MDD-T use MEMS technology while the substitute uses crystal resonators?

A: Both resonator technologies deliver equivalent electrical performance within the specified parameter set. The choice between MEMS and crystal resonators reflects different manufacturing approaches by each supplier. For circuit-level integration, the resonator technology is transparent provided all electrical specifications match, which they do in this case.

Q: Are there any compliance or regulatory differences between these parts?

A: Both devices share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. The FK2500065Z carries ROHS3 compliance and REACH unaffected status. The TC-25.000MDD-T compliance status is not specified in available data. The substitute meets current environmental and regulatory requirements.

Q: What packaging options are available for the FK2500065Z?

A: The FK2500065Z is supplied in Tape & Reel (TR) packaging format. Verify packaging requirements for your procurement and assembly processes.

Q: Is the FK2500065Z available in sufficient quantity for production?

A: Yes. The FK2500065Z has confirmed inventory of 9244 units in stock as an active product from Diodes Incorporated, providing reliable supply chain availability compared to the obsolete TC-25.000MDD-T.

Q: What are the power consumption characteristics of the FK2500065Z?

A: The FK2500065Z operates at a maximum supply current of 4mA during normal operation and 10µA in disable mode. These specifications enable low-power circuit designs and are suitable for battery-powered and energy-constrained applications.