TD-68.000MBD-T MEMS Oscillator Equivalent & Substitute Parts

Part Overview

The TD-68.000MBD-T is a 68 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 measuring 2.50mm × 2.00mm. The part is classified as Obsolete, making identification of equivalent and substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

TD-68.000MBD-T

TXC CORPORATIONIn Stock: 1030TD-68.000MBD-T Datasheet

Current PartRFQ

8W-68.000MBD-T

TXC CORPORATIONIn Stock: 9698W-68.000MBD-T Datasheet

DirectRFQ

ASDMPC-68.000MHZ-LR-T3

Abracon LLCIn Stock: 966ASDMPC-68.000MHZ-LR-T3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TD-68.000MBD-T are identified based on strict parameter alignment within the oscillator component category. The following criteria determine substitution eligibility:

Primary Matching Criteria:

• Frequency: 68 MHz (exact match required)
• Output Type: CMOS
• Function: Enable/Disable capability
• Operating Temperature Range: -40°C ~ 85°C (minimum)
• Frequency Stability: ±25ppm
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: MSL 1

Secondary Compatibility Factors:

• Supply voltage compatibility (3.3V nominal or within acceptable range)
• Package footprint compatibility (2.50mm × 2.00mm base dimensions)
• Physical height constraints for PCB assembly

The TD-68.000MBD-T has two identified substitutes: the 8W-68.000MBD-T (direct equivalent from TXC CORPORATION with crystal-based resonator) and the ASDMPC-68.000MHZ-LR-T3 (MEMS-based alternative from Abracon LLC with expanded voltage range).

Parameter Comparison

Engineering Selection Recommendations

8W-68.000MBD-T (TXC CORPORATION):

This substitute is the primary equivalent for the TD-68.000MBD-T. Both components are manufactured by TXC CORPORATION and share identical electrical specifications: 68 MHz frequency, ±25ppm stability, 3.3V supply, CMOS output, Enable/Disable function, and -40°C ~ 85°C operating range. The 8W-68.000MBD-T is currently Active in product status, ensuring long-term availability and supply chain continuity.

The key difference is the resonator technology: the 8W-68.000MBD-T uses a crystal-based resonator versus the MEMS resonator in the TD-68.000MBD-T. Both technologies deliver the same frequency stability specification. The 8W-68.000MBD-T exhibits lower maximum supply current (10mA versus 30mA), providing improved power efficiency. Package dimensions and footprint are identical (2.50mm × 2.00mm, 4-SMD No Lead). The 8W-68.000MBD-T is ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements.

ASDMPC-68.000MHZ-LR-T3 (Abracon LLC):

This substitute provides an alternative from a different manufacturer while maintaining MEMS resonator technology. The ASDMPC-68.000MHZ-LR-T3 matches the TD-68.000MBD-T on frequency (68 MHz), stability (±25ppm), output type (CMOS), function (Enable/Disable), and operating temperature range (-40°C ~ 85°C).

Critical differences exist in package configuration and voltage range. The ASDMPC-68.000MHZ-LR-T3 uses a 6-SMD, No Lead package versus the 4-SMD configuration of the main part, requiring PCB layout verification for pad compatibility. The supply voltage range is expanded (2.25V ~ 3.6V) compared to the fixed 3.3V specification, providing flexibility for designs with variable supply conditions. Maximum supply current is 35mA (versus 30mA), and the part includes a specified disable current of 95µA. The ASDMPC-68.000MHZ-LR-T3 is ROHS3 Compliant and REACH Unaffected.

Selection Criteria:

• For direct replacement with minimal design changes: Select 8W-68.000MBD-T (identical package, same manufacturer, lower power consumption)
• For designs requiring voltage range flexibility or MEMS technology preference: Select ASDMPC-68.000MHZ-LR-T3 (requires package footprint verification)

Frequently Asked Questions (FAQ)

Q: Can the 8W-68.000MBD-T directly replace the TD-68.000MBD-T without PCB modifications?

A: Yes. Both parts share identical package dimensions (2.50mm × 2.00mm, 4-SMD No Lead), footprint, and pinout. The electrical specifications (68 MHz, ±25ppm, 3.3V, CMOS output, Enable/Disable) are identical. No PCB layout changes are required.

Q: What is the primary advantage of the 8W-68.000MBD-T over the TD-68.000MBD-T?

A: The 8W-68.000MBD-T is currently Active in product status (versus Obsolete), ensuring long-term availability. Additionally, it exhibits lower maximum supply current (10mA versus 30mA), reducing power consumption in the application circuit.

Q: Can the ASDMPC-68.000MHZ-LR-T3 be used as a direct replacement?

A: The ASDMPC-68.000MHZ-LR-T3 is electrically compatible but requires PCB layout verification. The package type differs (6-SMD No Lead versus 4-SMD No Lead), necessitating confirmation that the pad configuration matches the PCB design. Footprint compatibility must be verified before implementation.

Q: What is the difference between MEMS and crystal-based resonators in these oscillators?

A: Both MEMS and crystal resonators in these parts deliver the same frequency stability specification (±25ppm) and operating temperature range (-40°C ~ 85°C). The TD-68.000MBD-T and ASDMPC-68.000MHZ-LR-T3 use MEMS technology, while the 8W-68.000MBD-T uses crystal technology. Selection between these technologies depends on application-specific requirements not specified in the component parameters.

Q: Is the ASDMPC-68.000MHZ-LR-T3 suitable for designs with variable supply voltage?

A: Yes. The ASDMPC-68.000MHZ-LR-T3 operates across a 2.25V ~ 3.6V supply range, accommodating designs with variable or regulated supply conditions. The TD-68.000MBD-T and 8W-68.000MBD-T are specified for fixed 3.3V operation.

Q: Are all three parts compliant with current environmental regulations?

A: The 8W-68.000MBD-T and ASDMPC-68.000MHZ-LR-T3 are both ROHS3 Compliant and REACH Unaffected. Regulatory compliance status for the TD-68.000MBD-T is not specified in the provided data.

Q: What is the significance of MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 indicates the lowest moisture sensitivity level, meaning the component has unlimited shelf life under standard storage conditions without requiring special moisture control measures or baking procedures prior to assembly.