TC-7.3728MBD-T Equivalent & Substitute Parts

Part Overview

The TC-7.3728MBD-T is a 7.3728 MHz MEMS-based XO (Standard) oscillator manufactured by TXC CORPORATION. This component operates at 3.3V with CMOS output and integrated Enable/Disable functionality in a 4-SMD, No Lead surface mount package. The part is currently classified as Obsolete, making identification of compatible substitute components essential for ongoing production and maintenance applications.

Substiute Parts

TC-7.3728MBD-T

TXC CORPORATIONIn Stock: 716TC-7.3728MBD-T Datasheet

Current PartRFQ

7X-7.3728MBD-T

TXC CORPORATIONIn Stock: 9167X-7.3728MBD-T Datasheet

DirectRFQ

ASE-7.3728MHZ-LR-T

Abracon LLCIn Stock: 1013ASE-7.3728MHZ-LR-T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC-7.3728MBD-T is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Frequency: 7.3728 MHz (exact match required)
• Output Type: CMOS
• Supply Voltage: 3.3V
• Function: Enable/Disable capability
• Frequency Stability: ±25ppm
• Operating Temperature Range: -40°C ~ 85°C
• Package Type: 4-SMD, No Lead
• Physical Dimensions: 0.126" L x 0.098" W (3.20mm x 2.50mm)
• Moisture Sensitivity Level: 1 (Unlimited)

The two substitute parts identified—7X-7.3728MBD-T (TXC CORPORATION) and ASE-7.3728MHZ-LR-T (Abracon LLC)—meet all mandatory matching parameters. Both are Active status products, providing long-term availability advantages over the Obsolete TC-7.3728MBD-T.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 7X-7.3728MBD-T

The 7X-7.3728MBD-T from TXC CORPORATION is the primary substitute option. This part maintains manufacturer continuity with the original TC-7.3728MBD-T while offering Active product status. The 7X series uses a crystal-based resonator instead of MEMS technology. Current consumption is reduced to 15mA maximum compared to the original 25mA specification. RoHS Compliance and REACH Unaffected status provide regulatory alignment for modern supply chains.

Secondary Substitute: ASE-7.3728MHZ-LR-T

The ASE-7.3728MHZ-LR-T from Abracon LLC provides an alternative from a different manufacturer. This part offers the lowest maximum supply current at 7mA and includes specified disable-mode current of 10µA, supporting power-sensitive applications. ROHS3 Compliance and REACH Unaffected status confirm regulatory compliance. Height-seated dimension is 0.047" (1.20mm), representing the maximum among the three parts.

Compatibility Considerations:

Both substitute parts are electrically and mechanically compatible with the TC-7.3728MBD-T based on matching frequency, output type, supply voltage, function, frequency stability, operating temperature range, package type, and physical footprint dimensions. The primary difference between substitutes is the resonator technology (crystal vs. MEMS) and current consumption profiles. Height-seated dimensions differ across all three parts (0.031", 0.043", and 0.047" respectively), which may impact applications with strict vertical clearance constraints.

Frequently Asked Questions (FAQ)

Q: Can the 7X-7.3728MBD-T directly replace the TC-7.3728MBD-T in existing designs?

A: Yes. Both parts share identical frequency (7.3728 MHz), output type (CMOS), supply voltage (3.3V), Enable/Disable function, frequency stability (±25ppm), operating temperature range (-40°C ~ 85°C), package type (4-SMD, No Lead), and physical footprint dimensions (0.126" L x 0.098" W). The primary difference is resonator technology (MEMS vs. crystal) and current consumption (25mA vs. 15mA maximum).

Q: What is the difference between MEMS and crystal-based oscillators in this application?

A: The TC-7.3728MBD-T uses MEMS (Micro-Electro-Mechanical Systems) resonator technology, while both substitute parts use crystal-based resonators. Both technologies deliver the same frequency stability (±25ppm) and operating characteristics specified for this 7.3728 MHz oscillator. The substitutes offer reduced current consumption and Active product status.

Q: Are there height clearance differences between these parts?

A: Yes. The TC-7.3728MBD-T has a maximum seated height of 0.031" (0.80mm), the 7X-7.3728MBD-T measures 0.043" (1.10mm), and the ASE-7.3728MHZ-LR-T measures 0.047" (1.20mm). Applications with vertical space constraints must account for these differences during PCB layout and component placement.

Q: Which substitute offers the lowest power consumption?

A: The ASE-7.3728MHZ-LR-T from Abracon LLC provides the lowest maximum supply current at 7mA and includes a specified disable-mode current of 10µA. The 7X-7.3728MBD-T operates at 15mA maximum. The original TC-7.3728MBD-T specifies 25mA maximum.

Q: Are both substitutes RoHS and REACH compliant?

A: Yes. The 7X-7.3728MBD-T is RoHS Compliant and REACH Unaffected. The ASE-7.3728MHZ-LR-T is ROHS3 Compliant and REACH Unaffected. Both meet modern regulatory requirements for electronic components.

Q: What is the Moisture Sensitivity Level for all three parts?

A: All three parts—TC-7.3728MBD-T, 7X-7.3728MBD-T, and ASE-7.3728MHZ-LR-T—are classified as MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Can I use the ASE-7.3728MHZ-LR-T in applications requiring disable-mode current specification?

A: Yes. The ASE-7.3728MHZ-LR-T specifies a maximum disable-mode current of 10µA, making it suitable for applications requiring low standby power consumption. The other two parts do not provide disable-mode current specifications.