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

Part Overview

The TD-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, Enable/Disable function, and is housed in a 4-SMD, No Lead package. The part is classified as Obsolete, making identification of compatible substitute components essential for ongoing system support and procurement.

Substiute Parts

TD-37.500MBD-T

TXC CORPORATIONIn Stock: 1043TD-37.500MBD-T Datasheet

Current PartRFQ

8W-37.500MBD-T

TXC CORPORATIONIn Stock: 12478W-37.500MBD-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TD-37.500MBD-T is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 37.5 MHz
• Output Type: CMOS
• Supply Voltage: 3.3V
• Function: Enable/Disable
• Operating Temperature Range: -40°C ~ 85°C
• Frequency Stability: ±25ppm
• Package / Case: 4-SMD, No Lead
• Mounting Type: Surface Mount
• Physical Dimensions: 0.098" L x 0.079" W (2.50mm x 2.00mm)

Allowable Variation Parameters:

• Base Resonator: MEMS or Crystal (both acceptable for functional equivalence)
• Current - Supply (Max): Substitute may be lower than original (25mA maximum acceptable)
• Height - Seated (Max): Minor variation acceptable within SMD assembly constraints
• Product Status: Active status preferred for ongoing availability

The 8W-37.500MBD-T qualifies as a direct substitute based on matching all mandatory parameters while offering improved product status (Active vs. Obsolete) and reduced supply current consumption.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 8W-37.500MBD-T

The 8W-37.500MBD-T is the qualified substitute for the obsolete TD-37.500MBD-T. Selection is based on the following engineering factors:

Functional Equivalence: All critical electrical parameters match exactly, including frequency (37.5 MHz), output type (CMOS), supply voltage (3.3V), function (Enable/Disable), frequency stability (±25ppm), and operating temperature range (-40°C ~ 85°C).

Package Compatibility: Both parts use identical 4-SMD, No Lead packaging with matching footprints (0.098" L x 0.079" W / 2.50mm x 2.00mm). The height difference (0.031" vs. 0.035" / 0.80mm vs. 0.90mm) is within standard SMD assembly tolerances and does not affect PCB layout compatibility.

Compliance Status: The 8W-37.500MBD-T carries Active product status, ensuring long-term availability and supply chain continuity. Both parts share identical ECCN (EAR99), HTSUS (8542.39.0001), and MSL (1 - Unlimited) classifications.

Performance Advantage: The substitute part demonstrates reduced maximum supply current (10mA vs. 25mA), providing improved power efficiency in applications where current consumption is a design consideration.

Resonator Technology: The transition from MEMS to Crystal-based resonator technology does not affect functional compatibility, as both technologies deliver identical electrical performance within the specified parameters.

Frequently Asked Questions (FAQ)

Q: Can the 8W-37.500MBD-T directly replace the TD-37.500MBD-T without PCB modifications?

A: Yes. Both parts share identical package dimensions (0.098" L x 0.079" W / 2.50mm x 2.00mm), footprints, and pinout configurations. The height difference (0.031" vs. 0.035" / 0.80mm vs. 0.90mm) is within standard SMD assembly tolerances and does not require PCB layout changes.

Q: What is the difference between MEMS and Crystal-based oscillators in this application?

A: The TD-37.500MBD-T uses MEMS (Micro-Electro-Mechanical Systems) resonator technology, while the 8W-37.500MBD-T uses Crystal resonator technology. Both deliver identical electrical performance at 37.5 MHz with ±25ppm frequency stability. The substitute part is functionally equivalent for all circuit applications.

Q: Does the lower supply current of the 8W-37.500MBD-T (10mA vs. 25mA) affect circuit design?

A: No. The substitute part's reduced maximum supply current (10mA) is a performance advantage. Circuits designed for the original 25mA specification will operate correctly with the lower-current substitute. Power supply and decoupling requirements remain unchanged.

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

A: No. Both parts share identical ECCN (EAR99), HTSUS (8542.39.0001), and Moisture Sensitivity Level (MSL 1 - Unlimited) classifications. Regulatory and export compliance requirements are equivalent.

Q: Why is the TD-37.500MBD-T classified as Obsolete?

A: The TD-37.500MBD-T has reached end-of-life status. The 8W-37.500MBD-T is the active equivalent from the same manufacturer, offering identical functionality with improved availability and supply chain support.

Q: Can the 8W-37.500MBD-T be used in new designs?

A: Yes. The 8W-37.500MBD-T is classified as Active and is suitable for both replacement applications and new product designs. Its Active status ensures long-term component availability and manufacturer support.

Q: Are there any temperature or frequency stability differences?

A: No. Both parts operate across the identical temperature range (-40°C ~ 85°C) and maintain the same frequency stability specification (±25ppm). Thermal and frequency performance characteristics are equivalent.