TC-133.330MBD-T MEMS Oscillator Equivalent & Substitute Parts

Part Overview

The TC-133.330MBD-T is a 133.33 MHz MEMS-based XO (Standard) oscillator manufactured by TXC CORPORATION. This component operates at 3.3V supply voltage with CMOS output and Enable/Disable function capability. The part is classified as Obsolete, making identification of equivalent and substitute components essential for ongoing system support and new design implementations.

The TC-133.330MBD-T is housed in a 4-SMD, No Lead surface mount package with compact dimensions of 3.20mm × 2.50mm and a seated height of 0.80mm. With 816 units currently in stock, this obsolete MEMS oscillator requires qualified substitutes for production continuity and long-term component availability.

Substiute Parts

TC-133.330MBD-T

TXC CORPORATIONIn Stock: 872TC-133.330MBD-T Datasheet

Current PartRFQ

7X-133.330MBD-T

TXC CORPORATIONIn Stock: 9887X-133.330MBD-T Datasheet

DirectRFQ

FKD330001

Diodes IncorporatedIn Stock: 1204FKD330001 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC-133.330MBD-T is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 133.33 MHz (exact match required)
• Output Type: CMOS
• Supply Voltage: 3.3V
• Function: Enable/Disable capability
• Package Type: 4-SMD, No Lead
• Package Dimensions: 3.20mm × 2.50mm footprint

Allowable Variation Parameters:

• Frequency Stability: ±25ppm (main part) to ±50ppm (substitute tolerance)
• Operating Temperature Range: -40°C to +85°C (main part) to -20°C to +70°C (reduced range acceptable for specific applications)
• Maximum Supply Current: 30mA (main part) to lower values (15mA, unspecified)
• Seated Height: 0.80mm (main part) to 1.10mm or 1.15mm (minor height variation acceptable within PCB assembly constraints)
• Base Resonator Type: MEMS (main part) to Crystal (functionally equivalent for this frequency and application)

Substitutes are classified into two categories: Direct Manufacturer Substitutes (same manufacturer, active product status) and Similar Manufacturer Substitutes (alternative manufacturers, active product status).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred):

The 7X-133.330MBD-T is the primary substitute for the obsolete TC-133.330MBD-T. Both components are manufactured by TXC CORPORATION and share identical electrical specifications (133.33 MHz, ±25ppm stability, -40°C to +85°C operating range, 3.3V CMOS output with Enable/Disable function). The 7X-133.330MBD-T is classified as Active product status, ensuring long-term availability and supply chain continuity. The primary difference is the base resonator type (Crystal vs. MEMS) and maximum supply current (15mA vs. 30mA). The seated height increases from 0.80mm to 1.10mm, which requires PCB layout verification for clearance compatibility. The 7X-133.330MBD-T carries RoHS Compliant certification, meeting modern environmental and regulatory requirements.

For Alternative Substitution:

The FKD330001 (Diodes Incorporated, SaRonix-eCera™ FK series) provides a functionally equivalent alternative when the 7X-133.330MBD-T is unavailable. This component maintains the same frequency (133.33 MHz), output type (CMOS), supply voltage (3.3V), function (Enable/Disable), and package footprint (3.20 × 2.50mm, 4-SMD No Lead). The FKD330001 is classified as Active product status with ROHS3 Compliant certification and REACH Unaffected status.

Critical Differences for FKD330001:

• Frequency stability is ±50ppm (wider tolerance than the main part's ±25ppm)
• Operating temperature range is reduced to -20°C to +70°C (narrower than the main part's -40°C to +85°C)
• Seated height is 1.15mm (0.35mm higher than the main part)
• Supply current specification is not provided in available documentation

The FKD330001 is suitable for applications where the reduced temperature range and wider frequency tolerance are acceptable. Applications requiring the full -40°C to +85°C operating range or ±25ppm frequency stability must use the 7X-133.330MBD-T.

Compliance and Certification: Both substitute parts meet MSL 1 (Unlimited) moisture sensitivity requirements. The 7X-133.330MBD-T and FKD330001 both carry RoHS compliance certifications (RoHS Compliant and ROHS3 Compliant, respectively), making them suitable for modern electronics manufacturing standards. Both parts are classified under ECCN EAR99 and HTSUS 8542.39.0001.

Frequently Asked Questions (FAQ)

Q1: Can the 7X-133.330MBD-T directly replace the TC-133.330MBD-T without PCB modifications?

The 7X-133.330MBD-T shares the same 4-SMD, No Lead package footprint (3.20 × 2.50mm) as the TC-133.330MBD-T, allowing direct pad-level compatibility. However, the seated height increases from 0.80mm to 1.10mm. PCB layout must be verified to ensure adequate clearance above the component. If the original design has minimal clearance (less than 0.30mm), mechanical interference may occur with overlying components or conformal coatings. In most standard PCB designs with typical component spacing, this height difference is accommodated without modification.

Q2: What is the significance of the base resonator type change from MEMS to Crystal?

The TC-133.330MBD-T uses a MEMS (Micro-Electro-Mechanical Systems) resonator, while the 7X-133.330MBD-T uses a Crystal resonator. Both technologies deliver the same electrical output (CMOS, 133.33 MHz, ±25ppm stability) and are functionally equivalent for this application. MEMS oscillators typically offer smaller size and lower power consumption in some designs, while crystal oscillators provide proven long-term reliability and stability. For the 133.33 MHz frequency and 3.3V supply voltage specified, both resonator types are equally suitable.

Q3: Why does the 7X-133.330MBD-T have lower maximum supply current (15mA vs. 30mA)?

The maximum supply current specification reflects the design characteristics of each oscillator. The 7X-133.330MBD-T's 15mA maximum is lower than the TC-133.330MBD-T's 30mA, indicating more efficient power consumption. This is a favorable characteristic for battery-powered or power-constrained applications. The lower current requirement does not indicate reduced performance; it reflects improved design efficiency. Applications designed for the TC-133.330MBD-T will operate correctly with the 7X-133.330MBD-T's lower current draw.

Q4: Is the FKD330001 suitable for all applications using the TC-133.330MBD-T?

The FKD330001 is suitable for applications where the operating temperature range of -20°C to +70°C is acceptable. Applications requiring operation at temperatures below -20°C or above +70°C must use the 7X-133.330MBD-T, which maintains the full -40°C to +85°C range. Additionally, applications with frequency stability requirements tighter than ±50ppm must use the 7X-133.330MBD-T (±25ppm). For applications within these parameter boundaries, the FKD330001 provides a qualified alternative with active product status and ROHS3 compliance.

Q5: What is the impact of ±50ppm frequency stability (FKD330001) versus ±25ppm (TC-133.330MBD-T)?

Frequency stability tolerance directly affects clock accuracy in digital systems. The ±25ppm specification of the TC-133.330MBD-T and 7X-133.330MBD-T allows maximum frequency deviation of ±3.33 kHz at 133.33 MHz. The ±50ppm specification of the FKD330001 allows maximum deviation of ±6.67 kHz. Applications with strict timing requirements (such as high-speed serial communications, precision data acquisition, or synchronization protocols) may require the tighter ±25ppm tolerance. Applications with relaxed timing tolerances can accommodate the ±50ppm specification.

Q6: Are there any supply chain or availability advantages to selecting one substitute over another?

The 7X-133.330MBD-T (925 units in stock) and FKD330001 (1182 units in stock) both show strong current inventory levels, indicating active market availability. The 7X-133.330MBD-T, being from the same manufacturer as the obsolete TC-133.330MBD-T, provides continuity with TXC CORPORATION's product ecosystem and support infrastructure. The FKD330001, from Diodes Incorporated, provides supply chain diversification and access to an alternative manufacturer's support and logistics network. For long-term production programs, qualifying both substitutes provides supply chain resilience.

Q7: Do the substitute parts require any firmware or software updates?

The TC-133.330MBD-T, 7X-133.330MBD-T, and FKD330001 are hardware oscillator components that provide clock signals to digital systems. They do not contain firmware or software and do not require updates. System firmware or software may require validation to confirm compatibility with the substitute oscillator's electrical characteristics (frequency, output type, enable/disable timing), but no updates to the oscillator component itself are applicable.

Q8: What is the MSL 1 (Unlimited) moisture sensitivity rating?

MSL (Moisture Sensitivity Level) 1 indicates the lowest moisture sensitivity classification. All three components (TC-133.330MBD-T, 7X-133.330MBD-T, and FKD330001) carry MSL 1 (Unlimited) ratings, meaning they can be stored indefinitely without moisture-controlled conditions and do not require special handling or baking procedures before soldering. This simplifies inventory management and reduces manufacturing process complexity.

Q9: Are the RoHS and REACH certifications important for component selection?

The 7X-133.330MBD-T (RoHS Compliant) and FKD330001 (ROHS3 Compliant) both meet Restriction of Hazardous Substances directives, ensuring compliance with environmental regulations in the European Union and other regions adopting similar standards. Both components are REACH Unaffected or carry REACH compliance status, confirming they meet chemical substance registration and authorization requirements. For applications subject to environmental or regulatory compliance mandates, these certifications are mandatory. For applications without such requirements, the certifications provide assurance of manufacturing quality and environmental responsibility.

Q10: Can the TC-133.330MBD-T be used alongside substitute parts in the same production batch?

The TC-133.330MBD-T (Obsolete status, 816 units in stock) can be used for current production runs while inventory is available. However, for long-term production continuity and new design implementations, the 7X-133.330MBD-T or FKD330001 should be qualified and used exclusively. Mixing obsolete and active components in the same production batch introduces supply chain risk and complicates inventory management. A planned transition to the 7X-133.330MBD-T is recommended as the primary long-term solution.