TC-14.7456MBE-T Equivalent & Substitute Parts

Part Overview

The TC-14.7456MBE-T is a 14.7456 MHz MEMS-based XO (Standard) CMOS oscillator manufactured by TXC CORPORATION. This surface mount oscillator operates at 3.3V with Enable/Disable functionality in a compact 4-SMD, No Lead package (3.20mm x 2.50mm). The part is 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-14.7456MBE-T

TXC CORPORATIONIn Stock: 1055TC-14.7456MBE-T Datasheet

Current PartRFQ

7X-14.7456MBE-T

TXC CORPORATIONIn Stock: 9567X-14.7456MBE-T Datasheet

DirectRFQ

AU-14.7456MBE-T

TXC CORPORATIONIn Stock: 1212AU-14.7456MBE-T Datasheet

DirectRFQ

ASE-14.7456MHZ-L-C-T

Abracon LLCIn Stock: 900ASE-14.7456MHZ-L-C-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC-14.7456MBE-T is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 14.7456 MHz (exact match required)
• Output: CMOS
• Supply Voltage: 3.3V
• Function: Enable/Disable
• Frequency Stability: ±50ppm
• Operating Temperature: -40°C ~ 85°C
• Package/Case: 4-SMD, No Lead
• Mounting Type: Surface Mount
• Package Dimensions: 3.20mm x 2.50mm (length x width)

All three substitute parts meet these mandatory criteria. Differences in base resonator technology (MEMS versus Crystal), supply current characteristics, and product status are secondary considerations that do not preclude substitution when electrical and mechanical parameters align.

Parameter Comparison

Engineering Selection Recommendations

For Active Production and New Designs:

The AU-14.7456MBE-T is the primary recommended substitute. This part carries AEC-Q100 automotive qualification, ensuring reliability across extended operational conditions. The AU series demonstrates the lowest supply current (6mA maximum), providing power efficiency advantages in battery-powered or power-constrained applications. Active product status guarantees long-term availability and supply chain stability.

For General Industrial Applications:

The 7X-14.7456MBE-T serves as a secondary option. Manufactured by TXC CORPORATION (same as the obsolete TC series), this part maintains design continuity while offering active product status. Supply current of 20mA remains within acceptable limits for most industrial oscillator applications.

For Cost-Sensitive Applications:

The ASE-14.7456MHZ-L-C-T from Abracon LLC provides an alternative from a different manufacturer. This part includes ROHS3 compliance and specifies Current - Supply (Disable) at 10µA, indicating defined low-power standby characteristics. Tape & Reel packaging supports high-volume production workflows.

Height Consideration:

All substitute parts exceed the seated height of the original TC-14.7456MBE-T (0.80mm). Substitute parts range from 1.10mm to 1.20mm maximum seated height. PCB layout and component clearance verification is required for applications with height-constrained designs.

Frequently Asked Questions (FAQ)

Q: Can the 7X-14.7456MBE-T directly replace the TC-14.7456MBE-T on existing PCBs?

A: Yes. Both parts share identical package dimensions (3.20mm x 2.50mm), 4-SMD No Lead configuration, and surface mount footprint. The 7X series uses crystal-based resonator technology versus the TC series MEMS technology, but electrical parameters (frequency, output type, supply voltage, function, stability) are equivalent. Height difference (1.10mm versus 0.80mm) must be verified against PCB clearance requirements.

Q: What is the difference between MEMS and Crystal-based oscillators in these parts?

A: The TC-14.7456MBE-T uses MEMS (Micro-Electro-Mechanical Systems) resonator technology, while substitute parts use crystal resonators. Both technologies deliver identical electrical performance at 14.7456 MHz with ±50ppm stability. MEMS technology typically offers improved shock/vibration resistance and lower phase noise, while crystal technology provides established reliability history. For this application, both are functionally equivalent.

Q: Why does the AU-14.7456MBE-T consume significantly less current (6mA) than the TC-14.7456MBE-T (25mA)?

A: Supply current differences reflect design optimization and manufacturing generation improvements. The AU series represents a more recent design iteration with enhanced power efficiency. Lower current consumption reduces thermal dissipation and extends battery life in portable applications. The 6mA specification is a guaranteed maximum value suitable for power-budget calculations.

Q: Is the AU-14.7456MBE-T suitable for automotive applications?

A: Yes. The AU-14.7456MBE-T carries AEC-Q100 qualification, which certifies compliance with automotive reliability and environmental stress testing standards. This certification is required for automotive-grade component selection and is not present on other substitute options.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 (Moisture Sensitivity Level 1) with Unlimited rating indicates the component requires no special moisture control during storage, handling, or assembly. These parts can be stored in standard industrial environments without desiccant packaging or humidity-controlled conditions. All listed parts share this MSL 1 rating.

Q: Can I use the ASE-14.7456MHZ-L-C-T as a drop-in replacement?

A: Yes, with height verification. The ASE part meets all electrical and mechanical compatibility requirements. It is supplied in Tape & Reel packaging, which is standard for high-volume production. The 1.20mm maximum seated height is the highest among substitutes and must be confirmed against PCB assembly clearance specifications.

Q: What is the significance of RoHS and REACH compliance on these parts?

A: RoHS (Restriction of Hazardous Substances) compliance certifies the part contains no lead, cadmium, mercury, or other restricted materials. REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) compliance indicates the part meets European chemical safety regulations. The 7X and AU series carry RoHS compliance; the ASE series carries ROHS3 compliance (updated standard). These certifications are required for products sold in regulated markets and for environmental compliance documentation.

Q: Are there any pin configuration differences between these parts?

A: All parts use identical 4-SMD, No Lead package configuration with the same pin assignments. No PCB layout modifications are required for substitution.