TC-40.000MDE-T MEMS Oscillator Equivalent & Substitute Parts

Part Overview

The TC-40.000MDE-T is a 40 MHz MEMS-based XO (Standard) oscillator manufactured by TXC CORPORATION. This component operates at 1.8V supply voltage with CMOS output and integrated Enable/Disable functionality, housed in a compact 4-SMD, No Lead package measuring 3.20mm x 2.50mm. The device is classified as Obsolete, necessitating identification of functionally equivalent active alternatives for new designs and ongoing production requirements.

Substiute Parts

TC-40.000MDE-T

TXC CORPORATIONIn Stock: 866TC-40.000MDE-T Datasheet

Current PartRFQ

AU-40.000MDE-T

TXC CORPORATIONIn Stock: 1113AU-40.000MDE-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC-40.000MDE-T is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 40 MHz
• Output Type: CMOS
• Supply Voltage: 1.8V
• Function: Enable/Disable capability
• Frequency Stability: ±50ppm
• Operating Temperature Range: -40°C ~ 85°C
• Package Type: 4-SMD, No Lead
• Package Dimensions: 3.20mm x 2.50mm

Substitution Basis: The AU-40.000MDE-T qualifies as a direct substitute despite differing in base resonator technology (Crystal vs. MEMS) because all electrical and mechanical parameters remain equivalent. Both components deliver identical functional performance within the specified operating envelope. The AU series represents an active product line from the same manufacturer, providing continuity for obsolete TC-series MEMS oscillators.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: AU-40.000MDE-T

The AU-40.000MDE-T is the direct substitute for the obsolete TC-40.000MDE-T. Selection rationale is based on the following engineering factors:

Product Status & Availability: The AU-40.000MDE-T maintains Active product status with confirmed inventory (1037 Pcs New Original In Stock), ensuring long-term supply chain continuity compared to the Obsolete TC-series.

Compliance & Certifications: The AU-40.000MDE-T carries AEC-Q100 automotive qualification and RoHS Compliance certification, providing enhanced reliability documentation suitable for regulated applications.

Electrical Equivalence: All critical electrical parameters match exactly: 40 MHz frequency, 1.8V supply, CMOS output, ±50ppm stability, and -40°C ~ 85°C operating range. Enable/Disable functionality is preserved.

Mechanical Compatibility: Both components share identical package type (4-SMD, No Lead) and footprint dimensions (3.20mm x 2.50mm). The AU-series exhibits a maximum seated height of 1.10mm versus 0.80mm for the TC-series; this 0.30mm difference must be evaluated against PCB assembly clearance specifications.

Resonator Technology Transition: The shift from MEMS to Crystal resonator technology does not impact functional performance within the specified parameter envelope. Both technologies deliver equivalent frequency stability and output characteristics for this application class.

Frequently Asked Questions (FAQ)

Q: Can the AU-40.000MDE-T directly replace the TC-40.000MDE-T without circuit modifications?

A: Yes. Both components are electrically and mechanically equivalent across all specified parameters. No circuit modifications are required. PCB layout must accommodate the AU-series maximum seated height of 1.10mm.

Q: What is the significance of the resonator technology change from MEMS to Crystal?

A: The base resonator technology differs, but this does not affect substitution validity. Both MEMS and Crystal resonators deliver identical electrical performance within the ±50ppm frequency stability specification and -40°C ~ 85°C operating range for this 40 MHz oscillator.

Q: Are there packaging differences between the TC and AU series?

A: Both use 4-SMD, No Lead packages with 3.20mm x 2.50mm footprints. The AU-40.000MDE-T is supplied in Tape & Reel (TR) format, while the TC-40.000MDE-T packaging format is not specified. Maximum seated height differs: TC-series 0.80mm, AU-series 1.10mm.

Q: Does the AU-40.000MDE-T meet automotive qualification requirements?

A: Yes. The AU-40.000MDE-T carries AEC-Q100 certification and RoHS Compliance status, providing automotive-grade reliability documentation not specified for the obsolete TC-series.

Q: What is the maximum supply current for the AU-40.000MDE-T?

A: Maximum supply current is 4mA. The TC-40.000MDE-T supply current specification is not provided in the available documentation.

Q: Is the AU-40.000MDE-T suitable for high-volume production?

A: Yes. The AU-40.000MDE-T is an Active product with confirmed inventory availability (1037 Pcs New Original In Stock) and Tape & Reel packaging suitable for automated assembly processes.