TC-8.000MBD-T Equivalent & Substitute Parts

Part Overview

The TC-8.000MBD-T is an 8 MHz MEMS-based XO (Standard) CMOS oscillator manufactured by TXC CORPORATION. This component operates at 3.3V with Enable/Disable functionality in a 4-SMD, No Lead surface mount package. The part is classified as Obsolete, necessitating identification of equivalent substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

TC-8.000MBD-T

TXC CORPORATIONIn Stock: 933TC-8.000MBD-T Datasheet

Current PartRFQ

7X-8.000MBD-T

TXC CORPORATIONIn Stock: 10867X-8.000MBD-T Datasheet

DirectRFQ

ASE-8.000MHZ-L-R-T

Abracon LLCIn Stock: 1133ASE-8.000MHZ-L-R-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC-8.000MBD-T is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 8 MHz
• Output Type: CMOS
• Supply Voltage: 3.3V
• Function: Enable/Disable
• Package / Case: 4-SMD, No Lead
• Physical Dimensions: 0.126" L x 0.098" W (3.20mm x 2.50mm)
• Frequency Stability: ±25ppm
• Operating Temperature Range: -40°C ~ 85°C
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variations:

• Base Resonator Type: MEMS or Crystal technologies are functionally equivalent at the specified frequency and stability
• Current Supply (Max): Substitute parts with lower maximum supply current are acceptable
• Height - Seated (Max): Variations within PCB assembly tolerances are permissible
• Product Status: Active substitutes are preferred for Obsolete main parts
• Packaging Format: Tape & Reel (TR) is compatible with component-level applications

The two identified substitutes meet all mandatory parameters and are therefore direct functional equivalents.

Parameter Comparison

Engineering Selection Recommendations

7X-8.000MBD-T (TXC CORPORATION): This substitute maintains TXC CORPORATION as the original manufacturer, providing design continuity. The part is Active status with RoHS Compliance certification. Maximum supply current is reduced to 15mA compared to the main part's 25mA, resulting in lower power consumption. Height increase from 0.80mm to 1.10mm requires verification of PCB assembly clearance in confined spaces. This option is suitable for applications prioritizing manufacturer consistency and established supply chain relationships.

ASE-8.000MHZ-L-R-T (Abracon LLC): This substitute introduces Abracon LLC as an alternative manufacturer with Active product status and ROHS3 Compliance certification. Maximum supply current is significantly reduced to 7mA with specified disable current of 10µA, offering superior power efficiency for battery-operated or low-power applications. Height increase to 1.20mm requires PCB assembly clearance verification. REACH Unaffected status confirms regulatory compliance. This option is suitable for applications requiring lowest power consumption and multi-source supply chain resilience.

Both substitutes are electrically and mechanically compatible with the TC-8.000MBD-T. Selection between them depends on power budget requirements, PCB assembly constraints, and supply chain preferences.

Frequently Asked Questions (FAQ)

Q: Can the 7X-8.000MBD-T and ASE-8.000MHZ-L-R-T be used interchangeably with the TC-8.000MBD-T?

A: Yes. Both substitutes meet all mandatory electrical and mechanical parameters: 8 MHz frequency, CMOS output, 3.3V supply, Enable/Disable function, ±25ppm stability, -40°C to 85°C operating range, 4-SMD No Lead package, and identical footprint dimensions (3.20mm x 2.50mm). Direct pin-for-pin substitution is supported.

Q: What is the impact of increased height on PCB assembly?

A: The TC-8.000MBD-T has a maximum seated height of 0.80mm. The 7X-8.000MBD-T increases to 1.10mm and the ASE-8.000MHZ-L-R-T to 1.20mm. These increases must be evaluated against PCB assembly clearance requirements, including solder reflow profiles and component placement constraints. Verification with PCB design and assembly documentation is necessary.

Q: Which substitute offers the lowest power consumption?

A: The ASE-8.000MHZ-L-R-T provides the lowest maximum supply current at 7mA, compared to 15mA for the 7X-8.000MBD-T and 25mA for the main part. Additionally, the ASE part specifies a disable current of 10µA, enabling power-down functionality for battery-powered applications.

Q: Are there compliance differences between the substitutes?

A: The 7X-8.000MBD-T carries RoHS Compliance certification. The ASE-8.000MHZ-L-R-T carries ROHS3 Compliance certification, representing a more recent regulatory standard. Both parts are REACH Unaffected. Compliance requirements for your application determine which certification level is necessary.

Q: What is the difference between MEMS and Crystal base resonators?

A: The main part uses MEMS technology while both substitutes use Crystal technology. At the specified 8 MHz frequency and ±25ppm stability, both technologies deliver equivalent functional performance. MEMS typically offers smaller size and lower power; Crystal technology offers established manufacturing maturity and supply availability.

Q: Can I mix these parts in production?

A: Yes, provided your design accommodates the height variation (0.80mm to 1.20mm) and your application can tolerate the power consumption differences. Multi-source qualification requires validation of electrical performance, thermal behavior, and PCB assembly compatibility for each substitute.

Q: What packaging format is supplied?

A: The main part packaging format is not specified. Both substitutes are supplied in Tape & Reel (TR) format, standard for component-level procurement and automated assembly operations.