TC-37.500MBD-T MEMS Oscillator Equivalent & Substitute Parts

Part Overview

The TC-37.500MBD-T is a 37.5 MHz MEMS-based XO (Standard) oscillator manufactured by TXC CORPORATION. This component operates at 3.3V with CMOS output and integrated Enable/Disable functionality, housed in a compact 4-SMD, No Lead package measuring 3.20mm × 2.50mm. The part is classified as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

TC-37.500MBD-T

TXC CORPORATIONIn Stock: 756TC-37.500MBD-T Datasheet

Current PartRFQ

7X-37.500MBD-T

TXC CORPORATIONIn Stock: 7877X-37.500MBD-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC-37.500MBD-T is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 37.5 MHz (exact match required)
• Output Configuration: CMOS
• Supply Voltage: 3.3V
• Enable/Disable Function: Present
• Frequency Stability: ±25ppm
• Operating Temperature Range: -40°C ~ 85°C
• Package Type: 4-SMD, No Lead
• Package Dimensions: 3.20mm × 2.50mm

The 7X-37.500MBD-T qualifies as a direct substitute based on complete alignment with all mandatory parameters. The primary distinction lies in the resonator technology (Crystal-based versus MEMS-based) and product status transition (Obsolete to Active), with secondary differences in maximum supply current and seated height that remain within acceptable operational tolerances.

Parameter Comparison

Engineering Selection Recommendations

The 7X-37.500MBD-T is the qualified substitute for the obsolete TC-37.500MBD-T. Selection is supported by the following factors:

Product Status: The 7X-37.500MBD-T maintains Active status with confirmed inventory availability (763 Pcs), ensuring long-term procurement viability compared to the Obsolete TC variant.

Compliance & Certifications: The 7X-37.500MBD-T carries RoHS Compliance and REACH Unaffected designations, meeting modern regulatory requirements. Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Electrical Equivalence: All critical electrical parameters align exactly: 37.5 MHz frequency, ±25ppm stability, 3.3V supply, CMOS output, Enable/Disable function, and -40°C ~ 85°C operating range.

Physical Compatibility: Both parts utilize identical 4-SMD, No Lead packaging with matching footprint dimensions (3.20mm × 2.50mm). The 7X variant exhibits a maximum seated height of 1.10mm versus 0.80mm for the TC variant; this 0.30mm difference is within standard PCB assembly tolerances and does not preclude direct substitution.

Supply Current Consideration: The 7X-37.500MBD-T operates at a maximum supply current of 15mA, compared to 25mA for the TC variant. This represents a 40% reduction in power consumption, providing a performance advantage in power-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the 7X-37.500MBD-T be used as a direct replacement for the TC-37.500MBD-T?

A: Yes. The 7X-37.500MBD-T qualifies as a direct substitute. Both parts share identical frequency (37.5 MHz), output type (CMOS), supply voltage (3.3V), Enable/Disable functionality, frequency stability (±25ppm), operating temperature range (-40°C ~ 85°C), and package footprint (3.20mm × 2.50mm, 4-SMD No Lead). Electrical and mechanical compatibility is confirmed.

Q: What is the difference between MEMS and Crystal resonators in these parts?

A: The TC-37.500MBD-T uses a MEMS (Micro-Electro-Mechanical Systems) resonator, while the 7X-37.500MBD-T uses a Crystal resonator. Both technologies deliver the same frequency stability (±25ppm) and operating characteristics specified for this application. The resonator technology difference does not affect functional compatibility.

Q: Will the height difference (0.80mm vs. 1.10mm) cause PCB assembly issues?

A: No. The 0.30mm height difference between the TC variant (0.80mm seated height) and the 7X variant (1.10mm seated height) falls within standard PCB assembly tolerances. Both parts use identical 4-SMD, No Lead packaging with matching footprints and are compatible with standard surface mount assembly processes.

Q: Why does the 7X-37.500MBD-T consume less current (15mA vs. 25mA)?

A: The 7X-37.500MBD-T operates at a lower maximum supply current of 15mA compared to the TC variant's 25mA. This represents improved power efficiency and is a performance advantage. The lower current requirement does not affect frequency accuracy, stability, or output characteristics.

Q: Is the 7X-37.500MBD-T compliant with modern regulatory standards?

A: Yes. The 7X-37.500MBD-T is RoHS Compliant and REACH Unaffected. Both the TC and 7X variants share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, confirming export and trade compliance alignment.

Q: What is the inventory status for the substitute part?

A: The 7X-37.500MBD-T is classified as Active with 763 Pcs of new original stock available. The TC-37.500MBD-T is Obsolete with 686 Pcs remaining in inventory. The Active status of the 7X variant ensures continued availability for future procurement cycles.

Q: Are there any application-specific limitations when substituting the 7X for the TC?

A: No application-specific limitations exist. Both parts deliver identical electrical performance across all specified parameters: frequency, stability, voltage, output type, and temperature range. The substitution is electrically and mechanically transparent to the circuit design.