TC-19.440MBE-T MEMS Oscillator Equivalent & Substitute Parts

Part Overview

The TC-19.440MBE-T is a 19.44 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 × 2.50mm. The TC-19.440MBE-T is classified as Obsolete, making identification of compatible substitute parts essential for ongoing production and maintenance applications.

Substiute Parts

TC-19.440MBE-T

TXC CORPORATIONIn Stock: 982TC-19.440MBE-T Datasheet

Current PartRFQ

7X-19.440MBE-T

TXC CORPORATIONIn Stock: 9637X-19.440MBE-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC-19.440MBE-T is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 19.44 MHz (exact match required)
• Output Type: CMOS
• Supply Voltage: 3.3V
• Function: Enable/Disable capability
• Frequency Stability: ±50ppm
• Operating Temperature Range: -40°C ~ 85°C
• Package Type: 4-SMD, No Lead
• Package Dimensions: 3.20mm × 2.50mm
• Mounting Type: Surface Mount

The 7X-19.440MBE-T qualifies as a direct substitute based on full alignment with all mandatory parameters. The primary distinction is the transition from MEMS-based resonator technology (TC series) to crystal-based resonator technology (7X series), with corresponding changes in product status from Obsolete to Active and modifications to supply current specifications and physical height.

Parameter Comparison

Engineering Selection Recommendations

The 7X-19.440MBE-T is the qualified substitute for the obsolete TC-19.440MBE-T based on the following engineering criteria:

Product Status Transition: The TC-19.440MBE-T is classified as Obsolete with 894 units in stock. The 7X-19.440MBE-T maintains Active product status with 865 units available, ensuring long-term supply chain viability and continued manufacturer support.

Electrical Equivalence: Both parts maintain identical frequency (19.44 MHz), output type (CMOS), supply voltage (3.3V), frequency stability (±50ppm), and operating temperature range (-40°C ~ 85°C). The 7X-19.440MBE-T exhibits lower maximum supply current (20mA versus 25mA), representing improved power efficiency.

Mechanical Compatibility: Both parts share identical package type (4-SMD, No Lead) and footprint dimensions (3.20mm × 2.50mm). The 7X-19.440MBE-T has a maximum seated height of 1.10mm compared to 0.80mm for the TC-19.440MBE-T. This 0.30mm height difference must be evaluated against specific PCB clearance requirements and 3D design constraints.

Compliance and Certifications: The 7X-19.440MBE-T is RoHS Compliant and REACH Unaffected, meeting modern regulatory requirements. Both parts carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Packaging Consideration: The TC-19.440MBE-T is supplied in bulk packaging, while the 7X-19.440MBE-T is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the 7X-19.440MBE-T directly replace the TC-19.440MBE-T on existing PCBs?

A: Yes, the 7X-19.440MBE-T is electrically and mechanically compatible with the TC-19.440MBE-T. Both parts use identical 4-SMD, No Lead packages with matching 3.20mm × 2.50mm footprints and surface mount mounting type. The 0.30mm difference in maximum seated height (1.10mm versus 0.80mm) must be verified against PCB clearance specifications and component placement constraints.

Q: What are the key differences between the TC and 7X series?

A: The primary difference is the resonator technology: TC-19.440MBE-T uses MEMS-based resonators, while 7X-19.440MBE-T uses crystal-based resonators. The 7X series part is Active (current production), whereas the TC series part is Obsolete. The 7X-19.440MBE-T also demonstrates lower maximum supply current (20mA versus 25mA) and includes RoHS Compliance certification.

Q: Are there any frequency or stability differences between these parts?

A: No. Both the TC-19.440MBE-T and 7X-19.440MBE-T operate at 19.44 MHz with identical frequency stability of ±50ppm. They maintain the same operating temperature range (-40°C ~ 85°C) and identical CMOS output characteristics.

Q: What is the impact of the height difference on PCB design?

A: The 7X-19.440MBE-T has a maximum seated height of 1.10mm compared to 0.80mm for the TC-19.440MBE-T. This 0.30mm increase must be evaluated against available PCB clearance, component stacking requirements, and enclosure constraints. If clearance is limited, this difference may require PCB layout modifications or component repositioning.

Q: Why is the 7X-19.440MBE-T supplied in Tape & Reel format?

A: Tape & Reel (TR) packaging is the standard format for automated surface mount assembly processes. This format enables high-speed pick-and-place machine compatibility and is preferred for production environments. The TC-19.440MBE-T bulk packaging is typical for obsolete or legacy components with lower production volumes.

Q: Are both parts compliant with current regulatory standards?

A: The 7X-19.440MBE-T is RoHS Compliant and REACH Unaffected, meeting current regulatory requirements. Both parts carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications for export control and tariff purposes.

Q: What is the Moisture Sensitivity Level for these parts?

A: Both the TC-19.440MBE-T and 7X-19.440MBE-T are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These parts do not require special moisture control during storage, handling, or assembly.