TC-24.576MBD-T Equivalent & Substitute Parts

Part Overview

The TC-24.576MBD-T is a MEMS-based XO (Standard) oscillator manufactured by TXC CORPORATION, operating at 24.576 MHz with CMOS output and 3.3V supply voltage. This component features Enable/Disable functionality in a compact 4-SMD, No Lead package measuring 3.20mm × 2.50mm. The part is currently classified as Obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and field replacement applications.

Substiute Parts

TC-24.576MBD-T

TXC CORPORATIONIn Stock: 2539TC-24.576MBD-T Datasheet

Current PartRFQ

7X-24.576MBD-T

TXC CORPORATIONIn Stock: 11817X-24.576MBD-T Datasheet

DirectRFQ

ASE-24.576MHZ-L-R-T

Abracon LLCIn Stock: 922ASE-24.576MHZ-L-R-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC-24.576MBD-T is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 24.576 MHz (exact match required)
• Output: CMOS
• Supply Voltage: 3.3V
• Function: Enable/Disable capability
• Frequency Stability: ±25ppm
• Operating Temperature: -40°C ~ 85°C
• Package: 4-SMD, No Lead
• Dimensions: 3.20mm × 2.50mm footprint
• Mounting: Surface Mount

Acceptable Variation Parameters:

• Base Resonator Type: MEMS or Crystal (both acceptable for functional equivalence)
• Current Supply (Max): Variation acceptable if within design margin
• Height (Seated): Variation acceptable within PCB assembly constraints
• Packaging Format: Cut Tape (CT) or Tape & Reel (TR) both acceptable for procurement

The identified substitute parts maintain full electrical and mechanical compatibility with the original TC-24.576MBD-T specification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 7X-24.576MBD-T

The 7X-24.576MBD-T is the preferred substitute for the obsolete TC-24.576MBD-T. Both parts are manufactured by TXC CORPORATION, ensuring design continuity and supply chain consistency. The 7X variant is currently Active in production status. The primary electrical difference is the reduced maximum supply current (15mA versus 25mA), which represents improved power efficiency. The 7X-24.576MBD-T is RoHS Compliant, meeting modern regulatory requirements. Height variation (1.10mm versus 0.80mm) is within acceptable PCB assembly tolerances for standard surface mount processes.

Secondary Substitute: ASE-24.576MHZ-L-R-T

The ASE-24.576MHZ-L-R-T manufactured by Abracon LLC provides an alternative from a different supplier, offering supply chain diversification. This part is Active in production status and provides the lowest maximum supply current (13mA) with documented disable-mode current specification (10µA). The ASE variant is ROHS3 Compliant and REACH Unaffected, satisfying stringent environmental compliance requirements. Height is 1.20mm, requiring verification within specific PCB assembly constraints. The Abracon part is suitable for applications where supplier redundancy and enhanced power efficiency are design objectives.

Substitution Validity:

Both substitute parts satisfy all mandatory electrical parameters: 24.576 MHz frequency, CMOS output, 3.3V supply, Enable/Disable function, ±25ppm stability, and -40°C to 85°C operating range. Package footprint (3.20mm × 2.50mm) and mounting type (Surface Mount, 4-SMD No Lead) are identical. Both substitutes are currently in active production, eliminating obsolescence risk associated with the original TC-24.576MBD-T.

Frequently Asked Questions (FAQ)

Q: Can the 7X-24.576MBD-T directly replace the TC-24.576MBD-T without circuit modification?

A: Yes. The 7X-24.576MBD-T maintains identical electrical specifications (frequency, output type, supply voltage, function, stability, and temperature range) and identical package footprint. The reduced maximum supply current (15mA versus 25mA) is a design improvement that does not require circuit changes. PCB layout remains compatible due to matching 3.20mm × 2.50mm dimensions.

Q: What is the significance of the height difference between the main part (0.80mm) and substitute parts (1.10mm and 1.20mm)?

A: Height variation affects PCB assembly clearance and solder reflow profile. The 0.30mm to 0.40mm increase in seated height must be evaluated against specific PCB design constraints, component density, and assembly equipment specifications. Standard surface mount assembly processes typically accommodate this variation without modification.

Q: Are both substitute parts suitable for new designs, or only for replacement of obsolete inventory?

A: Both substitute parts are currently Active in production status and are suitable for new designs. The 7X-24.576MBD-T is recommended for design continuity within the TXC CORPORATION product family. The ASE-24.576MHZ-L-R-T is recommended when supplier diversification or enhanced power efficiency specifications are design requirements.

Q: What is the difference between Cut Tape (CT) and Tape & Reel (TR) packaging?

A: Cut Tape packaging is supplied in individual tape segments, suitable for small-quantity procurement and manual assembly. Tape & Reel packaging is supplied on continuous reels, optimized for high-volume automated assembly. Both packaging formats contain identical components; selection depends on procurement volume and assembly process requirements.

Q: Does the ASE-24.576MHZ-L-R-T disable-mode current specification (10µA) provide operational advantage?

A: The documented disable-mode current specification (10µA) indicates measurable power consumption during Enable/Disable operation. This specification is relevant for applications with strict power budget requirements or extended battery-powered operation. The TC-24.576MBD-T and 7X-24.576MBD-T do not provide disable-mode current specifications, making the ASE variant preferable for power-critical applications.

Q: Are there compliance or certification differences between the three parts?

A: The TC-24.576MBD-T (Obsolete) does not specify RoHS or REACH status. The 7X-24.576MBD-T is RoHS Compliant. The ASE-24.576MHZ-L-R-T is ROHS3 Compliant and REACH Unaffected. For applications requiring modern environmental compliance documentation, the 7X or ASE variants are required.

Q: Can the ASE-24.576MHZ-L-R-T be used in applications originally designed for the TC-24.576MBD-T?

A: Yes. The ASE variant maintains all mandatory electrical parameters and package footprint compatibility. The 1.20mm seated height requires verification against specific PCB assembly constraints. The Abracon part is suitable for direct substitution in applications where supplier diversification is acceptable.