TC-40.000MBE-T Equivalent & Substitute Parts

Part Overview

The TC-40.000MBE-T is a 40 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 3.20mm x 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-40.000MBE-T

TXC CORPORATIONIn Stock: 982TC-40.000MBE-T Datasheet

Current PartRFQ

7X-40.000MBE-T

TXC CORPORATIONIn Stock: 8857X-40.000MBE-T Datasheet

DirectRFQ

ASE-40.000MHZ-L-C-T

Abracon LLCIn Stock: 748ASE-40.000MHZ-L-C-T Datasheet

DirectRFQ

LFSPXO025559

IQD Frequency ProductsIn Stock: 2465LFSPXO025559 Datasheet

DirectRFQ

SXO32C3A481-40.000M

Suntsu Electronics, Inc.In Stock: 1944SXO32C3A481-40.000M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC-40.000MBE-T is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 40 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
• Physical Dimensions: 3.20mm x 2.50mm
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: MSL 1

All four substitute parts listed below meet these mandatory parameters. Variations in current consumption, seated height, base resonator type (MEMS vs. Crystal), and product status are secondary considerations that do not preclude substitution when the primary electrical and mechanical specifications align.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection Criteria:

All four substitute parts are electrically and mechanically equivalent to the TC-40.000MBE-T based on matching frequency, output type, supply voltage, function, stability, temperature range, package configuration, and physical dimensions.

Active Product Status: The TC-40.000MBE-T is classified as Obsolete. All substitute parts (7X-40.000MBE-T, ASE-40.000MHZ-L-C-T, LFSPXO025559, SXO32C3A481-40.000M) maintain Active product status, ensuring long-term availability and continued manufacturing support.

Compliance Considerations:

• ASE-40.000MHZ-L-C-T (Abracon LLC): ROHS3 Compliant, REACH Unaffected
• LFSPXO025559 (IQD Frequency Products): ROHS3 Compliant, REACH Unaffected
• SXO32C3A481-40.000M (Suntsu Electronics, Inc.): ROHS3 Compliant

Current Consumption: The ASE-40.000MHZ-L-C-T offers the lowest maximum supply current at 13mA, compared to 25mA for the original TC-40.000MBE-T. This represents a potential power efficiency advantage in applications where supply current is a design constraint.

Packaging Availability:

• 7X-40.000MBE-T: Tape & Reel (TR) - 823 Pcs in stock
• ASE-40.000MHZ-L-C-T: Tape & Reel (TR) - 708 Pcs in stock
• LFSPXO025559: Tape & Reel (TR) - 2362 Pcs in stock (highest inventory)
• SXO32C3A481-40.000M: Bulk - 1865 Pcs in stock

Frequently Asked Questions (FAQ)

Q: Can the 7X-40.000MBE-T directly replace the TC-40.000MBE-T?

A: Yes. The 7X-40.000MBE-T is manufactured by the same supplier (TXC CORPORATION) and matches all critical electrical and mechanical parameters: 40 MHz frequency, CMOS output, 3.3V supply, Enable/Disable function, ±50ppm stability, -40°C to 85°C operating range, and 4-SMD No Lead package with 3.20mm x 2.50mm dimensions. The primary difference is product status (Active vs. Obsolete) and base resonator type (Crystal vs. MEMS).

Q: What is the significance of the base resonator difference (MEMS vs. Crystal)?

A: The TC-40.000MBE-T uses a MEMS resonator, while all substitute parts use Crystal resonators. Both technologies deliver the specified ±50ppm frequency stability and identical electrical performance within the defined operating parameters. The resonator type does not affect substitution eligibility when all electrical and mechanical specifications match.

Q: Are there height differences that could affect PCB layout?

A: Yes. The TC-40.000MBE-T has a maximum seated height of 0.80mm, while all substitute parts measure 1.10mm to 1.20mm. Verify that PCB clearance and component placement accommodate the taller profile. This is a mechanical consideration only and does not affect electrical compatibility.

Q: Which substitute part offers the best power efficiency?

A: The ASE-40.000MHZ-L-C-T (Abracon LLC) specifies a maximum supply current of 13mA, the lowest among all options. The original TC-40.000MBE-T draws up to 25mA. For power-sensitive applications, the ASE-40.000MHZ-L-C-T provides measurable current reduction while maintaining all electrical specifications.

Q: What packaging options are available?

A: Three parts are supplied in Tape & Reel (TR) format: 7X-40.000MBE-T, ASE-40.000MHZ-L-C-T, and LFSPXO025559. The SXO32C3A481-40.000M is supplied in Bulk packaging. Select based on production volume and assembly line requirements.

Q: Which substitute has the highest current inventory?

A: LFSPXO025559 (IQD Frequency Products) has 2362 Pcs in stock, the highest among all options. This part also carries ROHS3 compliance and REACH Unaffected status.

Q: Are all substitutes RoHS compliant?

A: The ASE-40.000MHZ-L-C-T, LFSPXO025559, and SXO32C3A481-40.000M are all ROHS3 Compliant. The 7X-40.000MBE-T RoHS status is not specified in the provided data.

Q: Can I use these parts interchangeably in existing designs?

A: Yes, provided that PCB layout accommodates the increased seated height (1.10mm to 1.20mm vs. 0.80mm for the original). All electrical parameters, pinout, package footprint, and functional characteristics are identical. No circuit modifications are required.